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Journal articles on the topic 'Lanthannm'

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Published: 5 June 2025

Last updated: 1 August 2025

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1

B., D. KALE, and H. MHASKE T. "Stability Constants of Biligand Chelates of Lanthaum(II) and Neodymium(II) with NTA, HEDTA, EDTA, CYDTA and DTPA as Primary Ligands and Aromatic Dihydroxy Compounds as Secondary Ligand." Journal of Indian Chemical Society Vol. 64, Jun 1987 (1987): 365–66. https://doi.org/10.5281/zenodo.6222459.

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Department of Chemistry, Vidarbha Mahavidyalaya, Amravati-444 604 <em>Manuscript received 12 August 1986, revised 18 May 1987, </em><em>accepted 5 June 1987</em> Stability Constants of Biligand Chelates of Lanthaum(II) and Neodymium(II) with NTA, HEDTA, EDTA, CYDTA and DTPA as Primary Ligands and Aromatic Dihydroxy Compounds as Secondary Ligand.  

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2

Simbolon, Tua Raja, Muhammadin Hamid, Martha Rianna, et al. "Characteristic of microstructure and magnetic properties in LaFeO3 using co-precipitation method." Journal of Aceh Physics Society 11, no. 2 (2022): 49–51. http://dx.doi.org/10.24815/jacps.v11i2.23691.

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Abstrak. Perkembangan penelitian material ferit memiliki karakteristik mikrostruktur dan sifat magnetik yang berbeda-beda. Karakteristik mikrostruktur dan sifat magnetik dari Fe3O4 dan LaFeO3 telah berhasil dilakukan menggunakan metode ko-presipitasi lanthanum klorida dan pasir besi alam digunakan sebagai prekursor untuk preparasi sintesis nanopartikel Fe3O4 LaFeO3. Rasio molar antara lanthanum klorida dan pasir besi alam adalah 1:1, dan tanpa lanthanium. Karakterisasi sampel menggunakan XRD, SEM dan VSM. Hasil XRD menunjukkan bahwa kedua sampel telah memiliki fase tunggal tanpa pengotor krist

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3

Barhate, Viral, Khushabu Agrawal, Vilas Patil, Sumit Patil, and Ashok Mahajan. "Spectroscopic study of La2O3 thin films deposited by indigenously developed plasma-enhanced atomic layer deposition system." International Journal of Modern Physics B 32, no. 19 (2018): 1840074. http://dx.doi.org/10.1142/s021797921840074x.

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The spectroscopic study of La2O3 thin films deposited over Si and SiC at low RF power of 25 W by using indigenously developed plasma-enhanced atomic layer deposition (IDPEALD) system has been investigated. The tris (cyclopentadienyl) lanthanum (III) and O2 plasma were used as a source precursor of lanthanum and oxygen, respectively. The [Formula: see text]1.2 nm thick La2O3 over SiC and Si has been formed based on our recipe confirmed by means of cross-sectional transmission electron microscopy. The structural characterization of deposited films was performed by means of X-ray photoelectron Sp

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4

Jarligo, Maria Ophelia D., Y. S. Kang, and Akira Kawasaki. "Thermal Evolution of Single Phase Lanthanum Zirconate." Key Engineering Materials 317-318 (August 2006): 31–36. http://dx.doi.org/10.4028/www.scientific.net/kem.317-318.31.

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Lanthania (La2O3) and zirconia (ZrO2) powders in ethanol based suspension were mechanochemically treated in a planetary ball mill for 12 hours at 200 rpm, dried and sintered at various temperatures from 400 to 1500. Particles in nanometer sizes are produced after milling. X-ray diffractometry results show the formation of single phase lanthanum zirconate on subsequent heat treatment for 1h at 1500. Phase evolution based on the intensities of the XRD plots and BET surface area analysis indicates three stages of crystallization: below 800, between 800 and ~1100, and above 1100 where reflections

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5

Inman, Ronald, Steven A. Schuetz, Carter M. Silvernail, et al. "Atomic layer deposition of lanthana thin films using high-purity lanthanum amino precursors." Materials Chemistry and Physics 104, no. 2-3 (2007): 220–24. http://dx.doi.org/10.1016/j.matchemphys.2007.03.002.

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6

He, Anqi, Fengshan Zhou, Fang Ye, et al. "Preparation and Characterization of Lanthanum Carbonate Octahydrate for the Treatment of Hyperphosphatemia." Journal of Spectroscopy 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/593636.

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We proposed a new approach to prepare lanthanum carbonate via reactions between lanthanum chloride and NaHCO3. In the reaction, small amount of NaHCO3solution was firstly added to the acidic lanthanum chloride solution to generate lanthanum carbonate nuclei and then NaHCO3is added to the lanthanum chloride at a constant speed. This approach makes both precipitation reaction and neutralization reaction take place simultaneously. Consequently, lanthanum carbonate is produced at low pH environment (pH below 4.0) so that the risk of generating lanthanum carbonate hydroxide is reduced. The product

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7

Samin, Samin, Suyanti Suyanti, Susanna Tuning Sunanti, and Wisnu Ari Adi. "Synthesis and Certification of Lanthanum Oxide Extracted from Monazite Sand." Indonesian Journal of Chemistry 20, no. 6 (2020): 1213. http://dx.doi.org/10.22146/ijc.44327.

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Synthesis and certification of lanthanum oxide extracted from monazite sand have been carried out. This research aimed to increase the added value of monazite sand and obtain the lanthanum oxide in-house certified reference material (CRM). Synthesis of lanthanum oxide consists of several stages, namely: monazite sand digestion, rare-earth elements hydroxide [REE(OH)3] precipitation, Ce separation, Nd separation, lanthanum oxalate precipitation, and calcination. Certification of lanthanum oxide was carried out by determining the average concentration of the oxides and its uncertainty from the s

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8

Upolovnikova, A. G., A. A. Babenko та L. A. Smirnov. "Equilibrium content of lanthanum in metal under the slag of СаО – SiO₂ – La₂O₃ – 15 % Al₂O₃ – 8 % MgO system". Izvestiya. Ferrous Metallurgy 63, № 11-12 (2021): 946–51. http://dx.doi.org/10.17073/0368-0797-2020-11-12-946-951.

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Thermodynamic modeling results of lanthanum equilibrium content in metal under the slag of CaO – SiO2– La2О3– Al2O3– MgO system corresponding to chemical composition of 16 points of local simplex plan are presented using the HSC 8.03 Chemistry (Outokumpu) software package in combination with the simplex planning lattice method. In the work, slag is represented by CaO – SiO2– La2O3– – 15 % Al2O3– 8 % MgO oxide system in a wide range of chemical composition for temperatures of 1550 and 1650 °C, and metal contains 0.06 % C, 0.25 % Si, 0.05 % Al (in this expression and hereinafter in mass.%). The

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9

Upolovnikova, A. G., A. A. Babenko та L. A. Smirnov. "Equilibrium content of lanthanum in metal under the slag of СаО – SiO₂ – La₂O₃ – 15 % Al₂O₃ – 8 % MgO system". Izvestiya. Ferrous Metallurgy 63, № 11-12 (2021): 946–51. http://dx.doi.org/10.17073/0368-0797-2020-11-12-946-951.

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Thermodynamic modeling results of lanthanum equilibrium content in metal under the slag of CaO – SiO2 – La2О3 – Al2O3 – MgO system corresponding to chemical composition of 16 points of local simplex plan are presented using the HSC 8.03 Chemistry (Outokumpu) software package in combination with the simplex planning lattice method. In the work, slag is represented by CaO – SiO2 – La2O3 – – 15 % Al2O3 – 8 % MgO oxide system in a wide range of chemical composition for temperatures of 1550 and 1650 °C, and metal contains 0.06 % C, 0.25 % Si, 0.05 % Al (in this expression and hereinafter in mass.%)

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10

Choi, Jeonghee, and Yong Hee Chung. "Preparation of Lanthanum Oxide and Lanthanum Oxycarbonate Layers on Titanium by Electrodeposition with Organic Solution." Journal of Nanomaterials 2016 (2016): 1–13. http://dx.doi.org/10.1155/2016/5140219.

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Layers of lanthanum oxide and lanthanum oxycarbonate were prepared on titanium by electrodeposition with organic solution. Four voltages ranging from 200 to 1000 V were applied for the electrodeposition at three concentrations of lanthanum ions. The organic solution was isobutanol and titanium foils were used as anodes and cathodes. Currents were monitored during the electrodeposition. Deposition layers were calcined at 700 K for 30 min or at 900 K for 60 and 200 min. The morphology and composition of the deposition layers were examined by scanning electron microscopy (SEM), X-ray diffraction

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11

Hernández Muñoz, W., J. Zárate Medina, J. Serrato Rodríguez, and J. Muñoz Saldaña. "Synthesis and characterization of 50-50 wt. lanthanum aluminate-lanthanum zirconate composite dried by spray-drying." MRS Advances 5, no. 42 (2020): 2173–79. http://dx.doi.org/10.1557/adv.2020.270.

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AbstractLanthanum aluminate-lanthanum zirconate composite was synthesized by using coprecipitation and powders were dried by spray-drying. Pseudoboehmite was used as a precursor of lanthanum aluminate during the precipitation process. Highly crystalline phases were obtained. Lanthanum zirconate exhibits a pyrochlore structure at lower synthesis temperature (>1500°C). Due drying technique lanthanum aluminate particles appear surrounded by lanthanum zirconate. No other remaining phases were observed and the phase distribution in the composite was homogeneous.

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12

Karthikeyan.S and Selvapandiyan.M. "Facile synthesis of nanoplates and nanoflower shaped La2O3 nanostructures by Reflux Route." INTERNATIONAL JOURNAL OF SCIENCE TECHNOLOGY AND HUMANITIES 2, no. 2 (2015): 95–98. http://dx.doi.org/10.26524/ijsth64.

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Lanthanum Oxide (La2O3 ) nanoparticles are successfully synthesized by simple reflux method using starting materials Lanthanum Nitrate and Urea. Lanthanum Oxide (La2O3 ) have multiple applications such as gas sensors, catalyst, Hydrogen storage, catalysts, photocatalytic wet oxidation etc. This paper mainly focuses on the synthesis of Lanthanum Oxide (La2O3 ) nanoparticles at different precursor concentration at different reaction time on the properties of the synthesized Lanthanum Oxide (La2O3) nanoparticles can be explored. The synthesized samples were calcinated 500ºC for 1hr. The Lanthanum

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13

Karthikeyan.s, Divya.j, Selvapandiyan.M, and Arumugam.J. "Synthesis of Nickel Oxide Thin Films via Sol Gel Route." INTERNATIONAL JOURNAL OF SCIENCE TECHNOLOGY AND HUMANITIES 2, no. 2 (2015): 99–101. http://dx.doi.org/10.26524/ijsth65.

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Lanthanum Oxide (La2O3) nanoparticles are successfully synthesized by simple reflux method using starting materials Lanthanum Nitrate and Urea. Lanthanum Oxide (La2O3) have multiple applications such as gas sensors, catalyst, Hydrogen storage, catalysts, photocatalytic wet oxidation etc. This paper mainly focuses on the synthesis of Lanthanum Oxide (La2O3) nanoparticles at different precursor concentration at different reaction time on the properties of the synthesized Lanthanum Oxide (La2O3) nanoparticles can be explored. The synthesized samples were calcinated 500ºC for 1hr. The Lanthanum Ox

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14

Jumadilov, T. K., L. K. Yskak, B. Totkhuskyzy, N. O. Myrzakhmetova, and O. V. Suberlyak. "SYNTHESIS OF MOLECULAR IMPRINTED POLYMERS COMPLEMENTARY TO LANTHANUM AND SCANDIUM IONS." Chemical Journal of Kazakhstan 73, no. 1 (2021): 52–62. http://dx.doi.org/10.51580/2021-1/2710-1185.05.

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The effect of the solvent/monomer (S/M) ratio on the structure and adsorption properties of microporous polymer particles imprinted with lanthanum and scandium ions is studied. Microporous particles imprinted with lanthanum and scandium ions were obtained from two functional monomers-methacrylic acid (MAC) and vinylpyridine (4-VP) - by forming a complex with the template ion of lanthanum and scandium by ion interactions. The selfassembled lanthanum/monomer complex was polymerized in the presence of an ethylene glycol dimethacrylate (EGDMA) crosslayer by suspension polymerization. The chemical

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15

Nagarajan, Balaji, Radhakrishnan Haridharan, and Gunasekar Manoharan. "Determination of Lanthanum in Lanthanum Dioxycarbonate Drug Substance by Potentiometric Titration." Chemical Science International Journal 33, no. 5 (2024): 71–87. http://dx.doi.org/10.9734/csji/2024/v33i5917.

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This research focused on the determination of lanthanum (LAN) in Lanthanum Dioxycarbonate drug substance through potentiometric titration, a vital aspect in ensuring pharmaceutical drug substance and formulation quality and efficacy. Lanthanum Dioxycarbonate, employed in treating hyperphosphatemia linked to chronic kidney disease, demands precise analytical methods for quality control. The analytical approach involves titrating Lanthanum Dioxycarbonate samples with a known concentration of ethylenediaminetetraacetic acid (EDTA) solution, with the endpoint detected potentiometrically. The study

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16

Han, Hong Jing, Yan Guang Chen, Cong Hao Xie, Dan Dan Yuan, Ying Chen, and Bao Hui Wang. "Influence of La₂O₃ on NO_x Emission in Iron Ore Sintering." Advanced Materials Research 781-784 (September 2013): 2594–97. http://dx.doi.org/10.4028/www.scientific.net/amr.781-784.2594.

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NOx emission in coke combustion with and without La2O3 was investigated in a fixed bed quartz reactor. The effects of La2O3 loading and lanthanum oxide particle size on NOx emission were discussed. NOx emission was also studied by sintering pot tests with lanthanum oxide modified coke as sintering fuel. The results showed that lanthanum oxide was catalytically active in promoting not only coke combustion but also NOx reduction. In coke combustion experiments, NOx and CO emission decreased with increasing lanthanum oxide loading up to 2.0wt% and decreasing lanthanum oxide particle size (28~150μ

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17

Zhang, Qiu Li, Zhen Jiang Ji, Jun Zhou, Xi Cheng Zhao, and Xin Zhe Lan. "Preparation of Lanthanum Oxide Nanoparticles by Chemical Precipitation Method." Materials Science Forum 724 (June 2012): 233–36. http://dx.doi.org/10.4028/www.scientific.net/msf.724.233.

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This paper investigated synthesis of Lanthanum oxide nanoparticles by precipitation method. Effects of reactant concentration, precipitator and dispersant agent on properties of Lanthanum oxide particles were studied. Lanthanum oxide particles were characterized by XRD and SEM. Experimental results showed that ammonium bicarbonate and PEG20000 were appropriate precipitation and dispersant respectively. The optimum process conditions were as follows: concentration of Lanthanum nitrate was 0.18mol/L, concentration ammonium bicarbonate of was 0.6mol/L, reaction temperature was 30. The average par

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18

Bagde, G. D., C. T. Londhe, and A. G. Bagde. "Morphological Studies on Spray Deposited Lanthanum Sulphide (La₂S₃) Thin Films." Key Engineering Materials 705 (August 2016): 283–88. http://dx.doi.org/10.4028/www.scientific.net/kem.705.283.

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The spray pyrolysis was employed to prepare Lanthanum Sulphide (La2S3) thin films on silicon non conducting glass substrate using lanthanum chloride and thioacetamide from aqueous medium. The effect of preparative parameters on film properties was studied. Further thin films characterization was carried out by electrical resistivity, thermoemf, optical, XRD and SEM measurement techniques. The electrical resistivity was the order of 104 – 105 Ω cm and it shows semiconducting behavior. The Thermoemf studies reveal that Lanthanum Sulphide material is P-type. The direct band gap of Lanthanum Sulph

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McCright, Callie, Jenna McCoy, Natalie Robbins, and Steve Comfort. "Slow-Release Lanthanum Effectively Reduces Phosphate in Eutrophic Ponds without Accumulating in Fish." Environments 10, no. 2 (2023): 20. http://dx.doi.org/10.3390/environments10020020.

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Nutrient runoff is a major water quality issue affecting water resources. Excess nutrients such as nitrate (NO3−) and phosphate (PO43−) entering surface waters promote eutrophication. Recent research showed that floating treatment wetlands combined with slow-release lanthanum composites deployed through airlift pumps can reduce NO3− and PO43− concentrations, minimize algae and weeds, and increase dissolved oxygen concentrations. While water quality improves following this biological and chemical approach, questions remain about the toxicity and potential accumulation of lanthanum in lentic org

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20

S, Gayathri, and Chandar Shekar B. "CHARACTERIZATION OF LANTHANUM ALUMINATE NANOPARTICLES PREPARED BY SOL-GEL ROUTE." Kongunadu Research Journal 2, no. 2 (2015): 11–12. http://dx.doi.org/10.26524/krj87.

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Lanthanum aluminate was synthesised by simple sol-gel route to get a homogenously mixed powder. Hexahydrated Lanthanum Nitrate and Aluminium Nitrate were used as precursors, heat treated to obtain a fine grained powder of Lanthanum Aluminate. The powder was calcined at 800°C to get fine LanthanumAluminate powder and then characterised by XRD, SEM and EDAS to obtain the structure, morphology and composition. The XRD revealed the formation of a crystalline phase of lanthanum aluminate with a rhombohedral structure. The SEM revealed the agglomeration of lanthanum aluminate nanoparticles andenergy

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21

Rajput, Abhinay. "Non-Stoichiometric Synthesis of Lanthanum Zirconate by Glycine Nitrate Process with Lanthana as Excess Agent." International Journal for Research in Applied Science and Engineering Technology 7, no. 10 (2019): 599–605. http://dx.doi.org/10.22214/ijraset.2019.10090.

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22

Oeckler, Oliver, Hansjürgen Mattausch, and Arndt Simon. "Einige Phosphidhalogenide des Lanthans und verwandte Verbindungen/ Some Phosphide Halides of Lanthanum and Related Compounds." Zeitschrift für Naturforschung B 62, no. 11 (2007): 1377–82. http://dx.doi.org/10.1515/znb-2007-1105.

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The pnictide halides La2I2P, La2I2As, La2I2Sb, La2Br2P and Y2Br2P have been synthesized from lanthanum and yttrium, red phosphorus, arsenic, and antimony, respectively, and the corresponding metal trihalides. Their structures contain close-packed metal atom double layers with pnicogen atoms in the octahedral voids. These layers are sandwiched by halogen atom layers. The compounds crystallize in the trigonal 1T-type with one sandwich-like layer per unit cell, or in the rhombohedral 3R-type with three layers per unit cell. Polytypism and twinning have been observed. For 3R-La2I2P, conductivity m

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23

Aaseth, Jan, and Anne-Lise Bjorke-Monsen. "Lanthanum Carbonate - A New Phosphate Binding Drug in Advanced Renal Failure." Current Medicinal Chemistry 25, no. 1 (2018): 113–17. http://dx.doi.org/10.2174/0929867324666170509125840.

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Background: Lanthanum (La) is considered to be a non-essential element. La has been used for several decades in China to improve yield in plant production and has also been shown to have significant performance enhancing effects in feeding trials on animal husbandry. The estimated dietary intake of La in humans is below 150 µg, which is lower than 10% of the estimated limit of safe and acceptable daily intake. Methods: The present review is based on literature search in available databases. Results: Upon ingestion of La as carbonate, the lanthanum ion (La3+) is released in the stomach and trap

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Swales, L. S., and D. R. Gardner. "X-ray analysis of Lymnaea stagnalis muscle fibres does not suggest that the sarcolemma is permeable to lanthanum ions." Journal of Cell Science 75, no. 1 (1985): 181–94. http://dx.doi.org/10.1242/jcs.75.1.181.

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The cross-striated muscle from the heart ventricle and the smooth penis retractor muscle of the freshwater snail Lymnaea stagnalis have been investigated by X-ray microanalysis to establish whether lanthanum can cross the plasma membrane, as has been reported by other investigators. Tissues were incubated in 1 mM ionic lanthanum before fixation in phosphate- or cacodylate-buffered fixative. X-ray mapping for emissions in the lanthanum energy range indicates a concentration of emissions that coincided only with the network of sub-surface transverse tubules formed by the invagination of the plas

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25

Hao, Shi Ming, Hui Fang Wang, and Dong Hui Zhao. "The Preparation and Properties Research on Lanthanum-Rich Film Cathode." Advanced Materials Research 228-229 (April 2011): 755–58. http://dx.doi.org/10.4028/www.scientific.net/amr.228-229.755.

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The surface lanthanum element plays a key role in emission mechanism of Lanthanum-contained cathodes. In order to gain insight into the relation between cathode emission properties and the cathode surface La/O ratio, lanthanum-rich film cathodes were prepared in situ by using a set of equipment, specially designed to cathode research, which connected with an Auger electron spectrometer (AES) and pulse laser deposition system. Electron emission properties and surface compositions (lanthanum and oxygen) of the cathodes are investigated experimentally. Experiment results indicate that film cathod

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26

Zybert, Magdalena, Aleksandra Tarka, Bogusław Mierzwa, and Wioletta Raróg-Pilecka. "Cobalt-lanthanum catalyst precursors for ammonia synthesis: determination of calcination temperature and storage conditions." Polish Journal of Chemical Technology 19, no. 2 (2017): 61–66. http://dx.doi.org/10.1515/pjct-2017-0029.

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Abstract A thermal decomposition of a cobalt-lanthanum catalyst precursor containing a mixture of cobalt and lanthanum compounds obtained by co-precipitation were studied using thermal analysis coupled with mass spectrometry (TG-MS). Studies revealed that the calcination in air at 500°C is sufficient to transform the obtained cobalt precipitate into Co3O4, but it leads to only partial decomposition of lanthanum precipitate. In order to obtain Co/La catalyst precursor containing La2O3 the calcination in air at the temperature about 800°C is required. However, it is unfavorable from the point of

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Alcaraz, Lorena, Olga Rodríguez Largo, Francisco J. Alguacil, Margarita Álvarez Montes, Carmen Baudín, and Félix A. López. "Extraction of Lanthanum Oxide from Different Spent Fluid Catalytic Cracking Catalysts by Nitric Acid Leaching and Cyanex 923 Solvent Extraction Methods." Metals 12, no. 3 (2022): 378. http://dx.doi.org/10.3390/met12030378.

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A laboratory-scale procedure was developed to obtain lanthanum oxide from spent fluid catalytic cracking catalyst, commonly used in the heavy crude oil cracking process. Two different solids, consisting mainly of silica, alumina, and a certain amount of rare earth elements, were leached under several conditions to recover the rare earths. Nitric acid leaching lead to the highest recovery of lanthanum, reaching a recovery percentage greater than 95% when a 1.5 M concentration was used. Subsequently, liquid phases were subjected to a liquid–liquid extraction process using Cyanex 923 diluted in S

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Wan, Yong, Wei-qing Chen, and Shao-jie Wu. "Effects of Lanthanum and Boron on the Microstructure and Magnetic Properties of Non-oriented Electrical Steels." High Temperature Materials and Processes 33, no. 2 (2014): 115–21. http://dx.doi.org/10.1515/htmp-2013-0039.

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AbstractThe effects of lanthanum and boron on the inclusion size distribution, microstructure, texture and magnetic properties of three non-oriented electrical steels have been studied. After final annealing, lanthanum effectively inhibited the precipitation of MnS precipitates and promoted the growth of grains, an addition of 0.0041 wt.% boron led to the precipitation of Fe2B particles and inhibited grain growth. On the other hand, steel containing 0.0055 wt.% lanthanum had the strongest {100} and {111} fiber texture and the weakest {112}〈110〉 texture among the steels. Compared to steel witho

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Jiang, Min, Hengheng Zheng, Chengliang Xu, Ye Wang, and Tingxin Wan. "Meta-Analysis Treatment Hyperphosphatemia Chronic Renal Failure Based on Nano Lanthanum Hydroxide." Journal of Nanoscience and Nanotechnology 20, no. 10 (2020): 6555–60. http://dx.doi.org/10.1166/jnn.2020.18576.

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In this study, our aim is to investigate the effect of lanthanum carbonate in chronic treatment renal failure complicated with hyperphosphatemia. Using methods with lanthanum carbonate, hyperphosphatemia, placebos, calcium carbonate, end-stage renal disease as keywords, we searched the Chinese Journal Full-text Database, Chinese sci-tech journal database, Wanfang Data knowledge service platform, web of science, PubMed, and other databases for literature quality; meta analysis was carried out after a subsequent evaluation. The meta analysis results showed a significant difference in the control

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Yu, Y. C., S. H. Zhang, H. Li, and S. B. Wang. "Effects of Rare Earth Lanthanum on the Solidification Structure and Hot Ductility of Fe-43Ni Expansion Alloy." High Temperature Materials and Processes 37, no. 3 (2018): 261–69. http://dx.doi.org/10.1515/htmp-2016-0157.

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AbstractEffects of lanthanum content on the solidification structure and the hot ductility of Fe-43Ni expansion alloy were investigated, the corresponding mechanisms were also discussed. The results showed that the macrostructures of the alloys were first significantly refined with increasing lanthanum content in the range of 0~0.025 % and then became coarse again with lanthanum content up to 0.04 %. La2O2S inclusions can serve as the effective inclusions sites promoting the refinement of the macrostructures. The changes of the macrostructures were influenced by the quantity density and the si

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Avdin, Viacheslav V., Tatyana V. Mosunova, and Artem V. Bogdanov. "Influence of pH and Synthesis Duration on the Composition and Thermal Behavior of Hydrolysis Products of Lanthanum Nitrate." Materials Science Forum 946 (February 2019): 150–55. http://dx.doi.org/10.4028/www.scientific.net/msf.946.150.

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The study investigates the hydrolysis products of lanthanum nitrate, obtained at various pH values and times of the hydrolytic agent addition. It has been found that the structure formation of lanthanum oxyhydroxide is accompanied by capturing the admixture ions, namely, the anions of the reactant salt and carbonate ions. It has been shown that thermal decomposition of the hydrolysis products proceeds in four stages for faster hydrolysis. If hydrolysis is slow, the intervals merge together into three stages of thermal decomposition. The hydrolysis products of lanthanum nitrate, heated up to 50

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Awad, Christina, Karin Gilkison, and Erwin Shaw. "Lanthanum phosphate binder-induced iron deficiency anaemia." BMJ Case Reports 12, no. 3 (2019): e226157. http://dx.doi.org/10.1136/bcr-2018-226157.

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Lanthanum carbonate is a phosphate binder that is used to reduce serum phosphate levels in patients with end-stage renal disease (ESRD). Lanthanum forms insoluble lanthanum phosphate complexes that are supposed to pass through the gastrointestinal (GI) tract unabsorbed. Phosphate binders have been reported to deposit in the GI tract and can cause mucosal injury. There are few case reports of GI bleeding associated with phosphate binder deposits. This case report presents a patient with iron deficiency anaemia secondary to biopsy-proven lanthanum deposits in the upper GI tract. There were no ov

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Peláiz, Barranco Aimé, los Santos Guerra José de, Zaldívar Osmany García, et al. "Effects of lanthanum modification on dielectric properties of Pb(Zr0.90Ti0.10)O3 ceramics:Enhanced antiferroelectric stability." Journal of Material Science 43 (September 4, 2008): 6087–93. https://doi.org/10.5281/zenodo.14685491.

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Lanthanum modified lead zirconate titanate ceramics with lanthanum content changing from 2 to 6 at% La and a Zr/Ti ratio of 90/10 (PLZT x/90/10) have beenanalyzed by using X-ray diffraction, dielectric response, differential scanning calorimetry, and ferroelectric hysteresis. An antiferroelectric state was found to be stabilized,whereas the long-range ferroelectric state was disrupted by lanthanum substitution on the lead sites. A ferroelectric state is shown to be stable over an antiferroelectric state for low lanthanum contents in a wide temperature range, where both phases coexist. With the

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Taufiqu Rochman, Nurul, and Wisnu Ari Adi. "Analysis of Structural and Microstructure of Lanthanum Ferrite by Modifying Iron Sand for Microwave Absorber Material Application." Advanced Materials Research 896 (February 2014): 423–27. http://dx.doi.org/10.4028/www.scientific.net/amr.896.423.

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Analysis crystal structure of lanthanum ferrite by modifying iron sand has been carried out. Lanthanum ferrite included one of the functional materials which had composition of ABO3perovskite system. The lanthanum ferrite is prepared by iron sand and lanthanum oxide powders. The mixture was milled for 10h with the various composition of lanthanum content. The samples are sintered at a temperature of 1000 °C for 10h. The microstructure analyses showed that the particle shapes was polygonal with the varied particle sizes and uniform distribution on the surface of the sample. The phase compositio

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Castellanos Bernal, Cindy Vanessa, Jimmy Morales, Guillermo Alfonso, Claudia Patricia Granja, Andrés Dector, and Jairo Alberto Gómez Cuaspud. "(Digital Presentation) Perovskite-Type Lanthanum Ferrite Synthesis Using Industrial Sugarcane Molasse and Its Application in Electrochemical Detection of Acetaminophen." ECS Meeting Abstracts MA2023-02, no. 61 (2023): 3333. http://dx.doi.org/10.1149/ma2023-02613333mtgabs.

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Perovskite-type lanthanum ferrite nanoparticles were developed and used to detect acetaminophen. For this work, lanthanum ferrite nanoparticles were synthesized by the combustion technique using industrial sugar molasses with lanthanum nitrate and ferric nitrate. To verify the electrochemical properties of an electrode modified with these perovskites, cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques were used. During the experiment, phosphate buffer solution was used. Preliminary tests will show promising results on the electrocatalytic effect of lanthanum ferrrite o

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Protsenko, Vyacheslav, L. M. Pavlenko, L. S. Bobrova, S. A. Korniy, T. E. Butyrina, and F. I. Danilov. "Ni–La coatings as electrocatalysts for hydrogen evolution reaction deposited from electrolytes based on a deep eutectic solvent." Voprosy Khimii i Khimicheskoi Tekhnologii, no. 3 (June 2023): 103–9. http://dx.doi.org/10.32434/0321-4095-2023-148-3-103-109.

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Ni–La electrocatalytic coatings were electrodeposited from electrolytes based on a eutectic mixture of choline chloride and ethylene glycol (the so-called deep eutectic solvent "ethaline") containing dissolved NiCl2 and LaCl3 salts. It was shown that in this case, nickel alloys containing up to approximately 1.75 wt.% lanthanum were formed. An increase in the cathodic current density and the content of La(III) salt in the solution contributed to a higher content of lanthanum in the electrodeposits. The presence of a lanthanum(III) salt in the electrolyte led to a noticeable leveling of the sur

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Xue, Shou Feng, Wen Yuan Wu, Xue Bian, Zhen Feng Wang, and Zhi Ren Yang. "Synthesis of Lanthanum Oxide Using Lanthanum Chloride by Hydrogen-Oxygen Flame Pyrolysis Route." Applied Mechanics and Materials 633-634 (September 2014): 499–503. http://dx.doi.org/10.4028/www.scientific.net/amm.633-634.499.

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Nowadays, people should pay more attention on the environment problems that had advent along with the development of rare earth metallurgy industry. A large number of water pollutant, air pollutant and solid pollutant were discharged in the process of synthesis of rare earth compound by precipitation and roasting process. In order to solve the industry pollution problems, a new technology route was developed for the preparation of lanthanum oxide using lanthanum chloride as raw material by oxy-hydrogen flame route. The experiment results showed that lanthanum chloride could directly convert to

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Alho, Miriam Martins, Agustín Anghileri, and Valeria Pozzoli. "Synthesis and characterization of imprinted polymers for rare earth recovery." MOJ Ecology & Environmental Sciences 9, no. 4 (2024): 144–48. http://dx.doi.org/10.15406/mojes.2024.09.00318.

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This study aims to discover a novel material suitable for rare earth recycling. We explore the efficacy of a physically imprinted copolymer in sequestering cationic lanthanum from aqueous solutions. The copolymerization process with MMA, incorporating lanthanum complexes with an acrylic derivative of neocuproine, facilitates physical crosslinking. Our investigations demonstrate the copolymer's reversible lanthanum binding capability in both batch and column experiments. At laboratory scale, the copolymer achieves an impressive lanthanum retention of approximately 760 mg/g at an initial concent

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Durgo, Ksenija, Ivana Halec, Ivana Šola, and Jasna Franekić. "Cytotoxic and Genotoxic Effects of the Quercetin/Lanthanum Complex on Human Cervical Carcinoma Cells In Vitro." Archives of Industrial Hygiene and Toxicology 62, no. 3 (2011): 221–27. http://dx.doi.org/10.2478/10004-1254-62-2011-2122.

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Cytotoxic and Genotoxic Effects of the Quercetin/Lanthanum Complex on Human Cervical Carcinoma CellsIn VitroQuercetin is the main flavonoid in diet with a potential in the treatment of cancer, cardiovascular, and neurodegenerative diseases. Due to its specific planar chemical structure, quercetin readily forms chelates with metal ions. Complexes of bioactive compounds and metal ions such as lanthanum often show strong cytotoxic and antitumour properties. The aim of this study was to compare the genotoxic effects of the quercetin/lanthanum complex on human cervical carcinoma cells with compare

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Taylor, Thomas H., Sixbert P. Muhoza, and Michael D. Gross. "Lowering the Impedance of Lanthanum Strontium Manganite-Based Electrodes with Lanthanum Oxychloride and Lanthanum Scavenging Chloride Salts." Journal of The Electrochemical Society 168, no. 11 (2021): 114508. http://dx.doi.org/10.1149/1945-7111/ac359a.

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The impact of infiltrating chloride salts on the electrochemical behavior of lanthanum strontium manganite-yttria stabilized zirconia (LSM-YSZ) cathodes was investigated under solid oxide fuel cell operation. Infiltrating a lanthanum chloride solution resulted in the formation of a lanthanum oxychloride (LaOCl) phase. A LaOCl phase also formed by infiltrating an ammonium chloride solution; however, lanthanum was scavenged from the LSM phase to form LaOCl. The third infiltrating solution, a combination of zirconium chloride and yttrium nitrate, formed LaOCl by scavenging lanthanum from LSM and

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Sardjono, Priyo, and Wisnu Ari Adi. "Thermal Analysis and Magnetic Properties of Lanthanum Barium Manganite Perovskite." Advanced Materials Research 896 (February 2014): 381–84. http://dx.doi.org/10.4028/www.scientific.net/amr.896.381.

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The lanthanum manganite is the family of magnetic materials which had the magnetic properties are varied depend on the composition. This study has been carried out synthesis and characterization of thermal and magnetic properties of the lanthanum barium manganite perovskite. The perovskite material is prepared by oxides, namely La2O3, BaCO3, and MnCO3. The mixture was milled for 10h and then sintered at temperature of 1000 °C for 10h. Thermal analysis and magnetic properties are measured by differential thermal analysis (TG-DTA) and vibrating sample magnetometer (VSM), respectively. Decomposit

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Balusamy, Brabu, Burcu Ertit Taştan, Seyda Fikirdesici Ergen, Tamer Uyar, and Turgay Tekinay. "Toxicity of lanthanum oxide (La2O3) nanoparticles in aquatic environments." Environmental Science: Processes & Impacts 17, no. 7 (2015): 1265–70. http://dx.doi.org/10.1039/c5em00035a.

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The study demonstrated the ecotoxic potential of lanthanum oxide nanoparticles on fresh-water aquatic microalgae Chlorella sp. and the crustacean Daphnia magna. Lanthanum oxide nanoparticles showed no toxic effects on algae and severe toxic effects on the crustacean. Results may play a vital role in the risk assessment process for exposure of lanthanum oxide nanoparticles in aquatic environments.

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Li, Su Ning, and Jia Jun Fu. "Effect of Lanthanum Doping on Corrosion Protection Properties of TiO₂ Coatings." Advanced Materials Research 557-559 (July 2012): 1830–33. http://dx.doi.org/10.4028/www.scientific.net/amr.557-559.1830.

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A series of lanthanum ion-doped titanium dioxide coatings have been prepared on the surface of 304 stainless steel by using sol-gel and dip-coating technology. The corrosion protection properties of the coatings were investigated by electrochemical measurements. It is found that the photogenerated cathodic protection property of the TiO2 coating is enhanced under illumination by doping with an appropriate amount of lanthanum ions. The results also indicate that the presence of lanthanum ions improves the corrosion protection property of the TiO2 coating without the photo effect attributed to t

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Kim, Hee-Kwon, and Tien Tan Bui. "Lanthanum(III) Trifluoromethanesulfonate Catalyzed Direct Synthesis of Ureas from N-Benzyloxycarbonyl-, N-Allyloxycarbonyl-, and N-2,2,2-Trichloroethoxycarbonyl-Protected Amines." Synlett 31, no. 10 (2020): 997–1002. http://dx.doi.org/10.1055/s-0040-1707991.

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A novel lanthanum triflate mediated conversion of N-benzyloxycarbonyl-, N-allyloxycarbonyl-, and N-trichloroethoxycarbonyl-protected amines into nonsymmetric ureas was discovered. In this study, lanthanum triflate was found to be an effective catalyst for preparing various nonsymmetric ureas from protected amines. A variety of protected aromatic and aliphatic carbamates reacted readily with various amines in the presence of lanthanum triflate to generate the desired ureas in high yields. This result demonstrated that this novel lanthanum triflate catalyzed preparation of ureas from Cbz, Allo

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45

Suppiah, Durga Devi. "Synergistic effect of Promoter addition and Nickel Loading for Catalysed Dry Reforming of Methane." Malaysian Catalysis-An International Journal 1, no. 2 (2022): 31–41. http://dx.doi.org/10.22452/mcij.vol1no2.3.

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This paper investigates the synergistic influence of both catalyst active sites Lanthanum promoter and Nickel loading on supported Ni catalysts for Dry Reforming of Methane (DRM) reaction. Alumina-supported nanosized Ni-based catalysts were synthesized using the impregnation method with varying percentages of Lanthanum promoter. Structural analysis via XRD, SEM and PSD show Nickel and lanthanum were homogeneously dispersed on Al2O3 supported catalyst with a range of 40-90 nm were obtained. Lanthanum addition favours equilibrated reaction equivalent to DRM mechanism. Increasing the La percentag

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Mahmudov, F. T., M. A. Ragimli, Z. A. Jabbarova, et al. "SORPTION OF LANTHANUM(III) IONS IN MODIFIED CLINOPTILOLITE." Azerbaijan Chemical Journal, no. 1 (March 28, 2023): 135–40. http://dx.doi.org/10.32737/0005-2531-2023-1-135-140.

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Under static conditions, using the limited volume method, the equilibrium and sorption kinetics of lanthanum ions on H+ and Na+-clinoptilolite were studied. It is shown that the sorption of lanthanum ions from dilute solutions occurs in the micropores of clinoptilolite. It has been established that the main capacity of modified clinoptilolites is realized in the secondary porous structure, the sorption of lanthanum ions is limited by diffusion in the zeolite grain. It is concluded that lanthanum ions are uniformly distributed in the H+ and Na+ forms of clinoptilolite and interact with Brönsted

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Huang, Lirong, Minjie Huang, Junhua Du, Zhigang Liu, Wei Li, and Jiangbo Zhu. "Study on the Friction and Wear Properties of Multiple Rare-Earth-Oxide-Reinforced Resin-Based Friction Materials." Materials 17, no. 12 (2024): 2990. http://dx.doi.org/10.3390/ma17122990.

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Aiming to solve the problem of thermal decay of resin-based friction materials at high temperatures, rare-earth-lanthanum-oxide-/cerium-oxide-reinforced resin-based friction plates were prepared using a hot-pressing molding process. The effect of lanthanum/cerium oxide with different contents on the mechanical and tribological properties of the resin-based friction of materials was studied, and its mechanism was explored. The result shows that lanthanum/cerium oxide improves the mechanical and tribological properties of materials so that the coefficient of friction of the specimen is more stab

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Benedetto Mas, Alice, Silvia Fiore, Sonia Fiorilli, Federico Smeacetto, Massimo Santarelli, and Ilaria Schiavi. "Analysis of Lanthanum and Cobalt Leaching Aimed at Effective Recycling Strategies of Solid Oxide Cells." Sustainability 14, no. 6 (2022): 3335. http://dx.doi.org/10.3390/su14063335.

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Lanthanum and cobalt are Critical Raw Materials and components of Solid Oxide Cells—SOCs electrodes. This review analyses lanthanum and cobalt leaching from waste materials (e-waste, batteries, spent catalysts), aiming to provide a starting point for SOC recycling, not yet investigated. The literature was surveyed with a specific interest for leaching, the first phase of hydrometallurgy recycling. Most references (86%) were published after 2012, with an interest higher (85%) for cobalt. Inorganic acids were the prevailing (>80%) leaching agents, particularly for lanthanum, while leaching pr

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Wang, Xinjie, Fei Lu, and Jiahan Huang. "Closed-loop photovoltage control of lead lanthanum zirconate titanate ceramic for photovoltaic-electrostatic-driven servo system." Journal of Intelligent Material Systems and Structures 28, no. 18 (2017): 2572–78. http://dx.doi.org/10.1177/1045389x17692049.

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A photovoltage closed-loop servo control model of lead lanthanum zirconate titanate ceramic is proposed for a photovoltaic-electrostatic-driven system in this article. The control equations of the proposed servo control model are derived based on the mathematical model of lead lanthanum zirconate titanate with coupled multi-physics fields. The parameters of photovoltage of lead lanthanum zirconate titanate ceramic during the illumination phase and light-off phase are identified through the static experiment. Then, photovoltage response of lead lanthanum zirconate titanate ceramic with simple o

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Yu, Ho-Chieh, and Kuan-Zong Fung. "Role of Sr Addition on the Structure Stability and Electrical Conductivity of Sr-Doped Lanthanum Copper Oxide Perovskites." Journal of Materials Research 19, no. 3 (2004): 943–49. http://dx.doi.org/10.1557/jmr.2004.19.3.943.

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The structural and electrical properties of lanthanum copper oxide were examined as a function of Sr addition. It was observed that the lanthanum oxide and copper oxide formed La2CuO4 with K2NiF4 structure when the powder mixture was heated at 800 °C in ambient pressure. Interestingly, the samples of Sr-doped (15∼25%) lanthanum copper oxides showed single perovskite-based phase after being heated at 800 °C. Without Sr addition, a single-perovskite phase of lanthanum copper oxide was observed only under the oxygen pressure as high as 65 kbar. The stabilization of perovskite structure in lanthan

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