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Articoli di riviste sul tema "Bismuth trioxide"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 1 febbraio 2022

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1

Wang, Bing, Junhua Wang, Aimin Chang, and Jincheng Yao. "Bismuth trioxide-tailored sintering temperature, microstructure and NTCR characteristics of Mn1.1Co1.5Fe0.4O4 ceramics." RSC Advances 9, no. 44 (2019): 25488–95. http://dx.doi.org/10.1039/c9ra04676c.

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2

Leontie, L., M. Caraman, M. Delibaş, and G. I. Rusu. "Optical properties of bismuth trioxide thin films." Materials Research Bulletin 36, no. 9 (July 2001): 1629–37. http://dx.doi.org/10.1016/s0025-5408(01)00641-9.

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3

Condurache-Bota, Simona, Mirela Praisler, Raluca Gavrila, and Nicolae Tigau. "Sandwich heterostructures of antimony trioxide and bismuth trioxide films: Structural, morphological and optical analysis." Applied Surface Science 391 (January 2017): 59–65. http://dx.doi.org/10.1016/j.apsusc.2016.07.033.

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4

Kelly, Zack, and Funsho Ojebuoboh. "Producing bismuth trioxide and its application in fire assaying." JOM 54, no. 4 (April 2002): 42–45. http://dx.doi.org/10.1007/bf02701656.

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5

Primathena, Indra, Denny Nurdin, Hendra Hermawan, and Arief Cahyanto. "Synthesis, Characterization, and Antibacterial Evaluation of a Cost-Effective Endodontic Sealer Based on Tricalcium Silicate-White Portland Cement." Materials 14, no. 2 (January 15, 2021): 417. http://dx.doi.org/10.3390/ma14020417.

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Mineral trioxide aggregate (MTA) is an ideal yet costly endodontic sealer material. Tricalcium silicate-white Portland cement (TS-WPC) seems to have similar characteristics to those of MTA. This work aims to characterize a modified TS-WPC and evaluate its antibacterial properties as a potential endodontic sealer material. The modified TS-WPC was synthesized from a 4:1 mixture of sterilized Indocement TS-WPC and bismuth trioxide using a simple solution method with 99.9% isopropanol. The mixture was stirred until it was homogenous, centrifuged, and dried. The material was then characterized usin

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6

Ismail, Raid A. "Characteristics of Bismuth trioxide film prepared by rapid thermal oxidation." e-Journal of Surface Science and Nanotechnology 4 (2006): 563–65. http://dx.doi.org/10.1380/ejssnt.2006.563.

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7

Liang, Tao-tao, and Xiao-gang Guo. "Remarkably Facile Preparation of Superhydrophobic Functionalized Bismuth Trioxide (Bi2O3) Coatings." Applied Sciences 9, no. 13 (June 29, 2019): 2653. http://dx.doi.org/10.3390/app9132653.

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Herein, a novel superhydrophobic functionalized nano-Bi2O3 coating is designed and fabricated using electrophoretic assembly deposition (EAD) in the optimal suspension of polyethylene glycol, ethanol, acetylacetone, and surface functionalization. The small size (70 nm, nano-scale) of Bi2O3 particles and uniform distribution make the target film possessing a promising structure for realizing hydrophobic functionalization. Moreover, the hydrophobicity and stability results indicate that the product has a high-water contact angle (CA) of ca. 167° and is kept almost stable after 180 days exposure

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8

Puszynski, Jan A., Christopher J. Bulian, and Jacek J. Swiatkiewicz. "Processing and Ignition Characteristics of Aluminum-Bismuth Trioxide Nanothermite System." Journal of Propulsion and Power 23, no. 4 (July 2007): 698–706. http://dx.doi.org/10.2514/1.24915.

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9

Eberl, Joachim, та Horst Kisch. "Mineralization of Phenol and 4-Chlorophenol Induced by Visible Light and Assisted by Semiconducting β-Bi2O3". Zeitschrift für Naturforschung B 65, № 3 (1 березня 2010): 399–404. http://dx.doi.org/10.1515/znb-2010-0325.

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Intensely yellow β -bismuth trioxide in the form of about 41 nm large crystallites has been prepared by thermal decomposition of (BiO)2CO3 at 400 ◦C. From the band gap energy of 2.3 eV obtained under the assumption of an indirect band-to-band transition and the quasi-Fermi level of −0.28±0.02 V (vs. NHE) a valence band edge position of 2.02 V is calculated. This semiconducting oxide assists a Vis light (λ ≥455 nm) aerial mineralization of the aqueous model pollutants phenol and 4-chlorophenol exhibiting maximum rates at a bismuth oxide concentration of 2.0 g L−1. In the absence of oxygen no de

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10

Liu, Li Hua, Jun Wu, Xin Li, and Zhu Qing Gong. "Preparation of High-Purity Nanometer Bismuth Trioxide from Silver-Zinc Slag." Advanced Materials Research 156-157 (October 2010): 785–93. http://dx.doi.org/10.4028/www.scientific.net/amr.156-157.785.

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Silver-zinc slag, containing a lot of Bi, Ag, Cu, Zn, Pb and a little Au, has high comprehensive utilization value. This paper describes a preparation method of high-purity nanometer bismuth trioxide (Bi2O3) from silver-zinc slag by hydrometallurgical method. The results showed that Bi could be effectively leached out from silver-zinc slag using sodium chlorate, hydrochloric acid and sodium chloride as leaching agents, and the leaching rate of Bi was up to 99.03% under the optimum conditions. The contents of Pb2+ and Ag+ in BiCl3 solution could be reduced to about 1mg/L by using silver-zinc sl

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11

Xia, Nannan, Tianxiang Zhou, Shanshan Mo, Shuangli Zhou, Wujun Zou, and Dingsheng Yuan. "A Facile Method to Prepare Nanosheets Bismuth Trioxide for Electrochemical Capacitors." ECS Transactions 28, no. 17 (December 17, 2019): 121–25. http://dx.doi.org/10.1149/1.3503358.

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12

Felix, Taís, Orlando P. Pinto, Augusto Peres, João M. Costa, Claudia Sayer, Alexander B. Morgan, and Pedro HH Araújo. "Comparison of bismuth trioxide and antimony trioxide as synergists with decabromodiphenyl ether in flame retardancy of high-impact polystyrene." Journal of Fire Sciences 30, no. 6 (September 6, 2012): 566–74. http://dx.doi.org/10.1177/0734904112456004.

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13

Peng, Tzu-Yu, May-Show Chen, Ya-Yi Chen, Yao-Jui Chen, Chin-Yi Chen, Alex Fang, Bo-Jiun Shao, Min-Hua Chen, and Chung-Kwei Lin. "Impact of Zr-Doped Bi2O3 Radiopacifier by Spray Pyrolysis on Mineral Trioxide Aggregate." Materials 14, no. 2 (January 19, 2021): 453. http://dx.doi.org/10.3390/ma14020453.

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Mineral trioxide aggregates (MTA) have been developed as a dental root repair material for a range of endodontics procedures. They contain a small amount of bismuth oxide (Bi2O3) as a radiopacifier to differentiate adjacent bone tissue on radiographs for endodontic surgery. However, the addition of Bi2O3 to MTA will increase porosity and lead to the deterioration of MTA’s mechanical properties. Besides, Bi2O3 can also increase the setting time of MTA. To improve upon the undesirable effects caused by Bi2O3 additives, we used zirconium ions (Zr) to substitute the bismuth ions (Bi) in the Bi2O3

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14

Cho, J. H., M. S. Kim, and J. D. Rhim. "Comparison of radiation shielding ratios of nano-sized bismuth trioxide and molybdenum." Radiation Effects and Defects in Solids 170, no. 7-8 (July 3, 2015): 651–58. http://dx.doi.org/10.1080/10420150.2015.1080703.

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15

Öztürk, Esra, and Nilgun Ozpozan Kalaycioglu. "Synthesis and characterization of terbium oxide (III–IV) doped bismuth trioxide polymorphs." Journal of the Chinese Advanced Materials Society 1, no. 2 (June 2013): 90–96. http://dx.doi.org/10.1080/22243682.2013.792540.

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16

Cervino, Gabriele, Luigi Laino, Cesare D’Amico, Diana Russo, Ludovica Nucci, Giulia Amoroso, Francesca Gorassini, et al. "Mineral Trioxide Aggregate Applications in Endodontics: A Review." European Journal of Dentistry 14, no. 04 (July 29, 2020): 683–91. http://dx.doi.org/10.1055/s-0040-1713073.

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AbstractA current topic in dentistry concerns the biocompatibility of the materials, and in particular, conservative dentistry and endodontics ones. The mineral trioxide aggregate (MTA) is a dental material with biocompatibility properties to oral and dental tissues. MTA was developed for dental root repair in endodontic treatment and it is formulated from commercial Portland cement, combined with bismuth oxide powder for radiopacity. MTA is used for creating apical plugs during apexification, repairing root perforations during root canal therapy, treating internal root resorption, and pulp ca

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17

Yang, Tzu-Sen, May-Show Chen, Cheng-Jyun Huang, Chin-Yi Chen, Agnese Brangule, Aleksej Zarkov, Aivaras Kareiva, Chung-Kwei Lin, and Jen-Chang Yang. "A Novel Sol-Gel Bi2-xHfxO3+x/2 Radiopacifier for Mineral Trioxide Aggregates (MTA) as Dental Filling Materials." Applied Sciences 11, no. 16 (August 8, 2021): 7292. http://dx.doi.org/10.3390/app11167292.

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Mineral trioxide aggregate (MTA) is well known as an effective root canal filling material for endodontics therapy. Within MTA, bismuth oxide (Bi2O3) serving as the radiopacifier still has biocompatibility concerns due to its mild cytotoxicity. In the present study, we tried to modify the Bi2O3 radiopacifier by doping hafnium ions via the sol-gel process and investigated the effects of different doping ratios (Bi2-xHfxO3+x/2, x = 0–0.3) and calcination temperatures (400–800 °C). We mixed various precursor mixtures of bismuth nitrate (Bi(NO3)3·5H2O) and hafnium sulfate (Hf(SO4)2) and controlled

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18

Gómez-Torres, X., M. Esquivel-Gaón, D. J. López-Ventura, S. Treviño, L. M. Del Razo, O. Barbier, and A. De Vizcaya-Ruiz. "Subchronic exposure to bismuth trioxide nanoparticles induces mild nephrotoxicity in male Wistar rats." Toxicology Letters 259 (October 2016): S242—S243. http://dx.doi.org/10.1016/j.toxlet.2016.07.582.

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19

Sekkina, M. M. Abou, and E. El-Shereafy. "Spectral properties and temperature-dependence of semiconductivity of various doped bismuth trioxide polycrystals." Journal of Thermal Analysis 32, no. 4 (July 1987): 1209–18. http://dx.doi.org/10.1007/bf01905175.

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20

HU, Han-xiang, Ke-qiang QIU та Guo-fu XU. "Preparation of nanometer δ- and β-bismuth trioxide by vacuum vapor-phase oxidation". Transactions of Nonferrous Metals Society of China 16, № 1 (лютий 2006): 173–77. http://dx.doi.org/10.1016/s1003-6326(06)60031-9.

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21

Martirosyan, K. S., L. Wang, A. Vicent, and D. Luss. "Synthesis and performance of bismuth trioxide nanoparticles for high energy gas generator use." Nanotechnology 20, no. 40 (September 14, 2009): 405609. http://dx.doi.org/10.1088/0957-4484/20/40/405609.

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22

Wang, Yue, Yan-Jun Liu, Shao-Yang Li, Mao Ye, Yin-Hua Shao, Rong Wang, Li-Feng Guo, Cui-E. Zhao, and Ang Wei. "Low Temperature Synthesis of Tungsten Trioxide/Bismuth Tungstate Heterojunction with Enhanced Photocatalytic Activity." Journal of Nanoscience and Nanotechnology 17, no. 8 (August 1, 2017): 5520–24. http://dx.doi.org/10.1166/jnn.2017.13812.

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23

Al-Ghamdi, A. A., Yusuf Al-Turki, Nadia Abdel Aal, Fahrattin Yakuphanoglu, and Farid El-Tantawy. "Microwave—assisted hydrothermal synthesis of monoclinic bismuth trioxide nanorods: optical and photocatalytic properties." Journal of Materials Science: Materials in Electronics 28, no. 12 (March 3, 2017): 8684–93. http://dx.doi.org/10.1007/s10854-017-6593-3.

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24

Grazziotin-Soares, R., M. H. Nekoofar, T. E. Davies, A. Bafail, E. Alhaddar, R. Hübler, A. L. S. Busato, and P. M. H. Dummer. "Effect of bismuth oxide on white mineral trioxide aggregate: chemical characterization and physical properties." International Endodontic Journal 47, no. 6 (September 12, 2013): 520–33. http://dx.doi.org/10.1111/iej.12181.

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25

Cheng, Junfeng, Jun Zhou, Zhixiong Lin, Dun Wu, Chunlin Liu, Zheng Cao, Qingting Ni, and Ning Zhang. "Locally controllable laser patterning transfer of thermoplastic polyurethane induced by sustainable bismuth trioxide substrate." Applied Surface Science 550 (June 2021): 149299. http://dx.doi.org/10.1016/j.apsusc.2021.149299.

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26

BOUCHAREB, FATIMA ZOHRA, and NASR-EDDINE HAMDADOU. "ANNEALING EFFECT ON STRUCTURAL AND OPTICAL PROPERTIES OF COPPER-DOPED BISMUTH TRIOXIDE Cu:Bi2O3 THIN FILMS." Surface Review and Letters 27, no. 07 (November 25, 2019): 1950174. http://dx.doi.org/10.1142/s0218625x19501749.

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Abstract (sommario):

In this work, we have examined the effect of annealing temperature on Cu-doped Bi2O3 thin films at 1%, 3% and 5% doping rate successfully prepared by spray pyrolysis technique onto glass substrates. The obtained films were subsequently annealed at different temperature for 4[Formula: see text]h. GIXRD analysis reveals the polycrystalline nature of deposited films and shows the formation of mixed [Formula: see text]- and [Formula: see text]-Bi2O3 phases. With the increase of doping rate, [Formula: see text]-phase of Bi2O3 was identified at medium temperature. The average grain size of thin film

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27

MIURA, Yasuyuki, and Tomozo KOH. "Spectrophotometric determination of micro amounts of manganese(II) via its oxidation by sodium bismuth trioxide." Bunseki kagaku 35, no. 6 (1986): 524–29. http://dx.doi.org/10.2116/bunsekikagaku.35.6_524.

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28

Thiruvengadathan, Rajagopalan, Clay Staley, Jordan M. Geeson, Stephen Chung, Kristofer E. Raymond, Keshab Gangopadhyay, and Shubhra Gangopadhyay. "Enhanced Combustion Characteristics of Bismuth Trioxide-Aluminum Nanocomposites Prepared through Graphene Oxide Directed Self-Assembly." Propellants, Explosives, Pyrotechnics 40, no. 5 (April 16, 2015): 729–34. http://dx.doi.org/10.1002/prep.201400238.

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29

Li, Li, Xiandan Huang, Jianqi Zhang, Wenzhi Zhang, Fengyan Ma, Zhixin Xiao, Shuang Gai, Dandan Wang, and Na Li. "Multi-layer three-dimensionally ordered Bismuth trioxide/Titanium dioxide nanocomposite: Synthesis and enhanced photocatalytic activity." Journal of Colloid and Interface Science 443 (April 2015): 13–22. http://dx.doi.org/10.1016/j.jcis.2014.11.062.

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30

Bhutani, M. M., and Ramesh Kumari. "Adsorption of low level51Cr(VI) from aqueous solution by bismuth trioxide: Kinetic and IR study." Journal of Radioanalytical and Nuclear Chemistry Articles 180, no. 1 (May 1994): 145–53. http://dx.doi.org/10.1007/bf02039913.

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Mandai, Shinya, Kazushi Kinugasa, and Takashi Ohmoto. "Direct thrombosis of aneurysms with cellulose acetate polymer." Journal of Neurosurgery 77, no. 4 (October 1992): 497–500. http://dx.doi.org/10.3171/jns.1992.77.4.0497.

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✓ The authors have developed a liquid material for thrombosing aneurysms. This material is a mixture of cellulose acetate polymer and bismuth trioxide dissolved in dimethyl sulfoxide. On contact with blood, the dimethyl sulfoxide diffuses and cellulose acetate polymer forms, which balloons when slowly injected into the blood. The polymer solidifies from surface to core in 5 minutes. Cellulose acetate polymer was injected directly into experimental aneurysms created in 10 dogs; it rapidly hardened in the shape of the aneurysms, completely obliterating them but preserving the parent vessels in a

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32

Fa'izzah, Maulidia, Widjijono Widjijono, Yuichi Kamiya, and Nuryono Nuryono. "Synthesis and Characterization of White Mineral Trioxide Aggregate Using Precipitated Calcium Carbonate Extracted from Limestone." Key Engineering Materials 840 (April 2020): 330–35. http://dx.doi.org/10.4028/www.scientific.net/kem.840.330.

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White Mineral Trioxide Aggregate (WMTA) using precipitated CaCO3 (PCC) from limestone has been synthesized. PCC in calcite structure was extracted from limestone by calcination at 900 °C for 3 h, dissolved in 0.8 M nitric acid solution and followed with carbonation for 60 minutes. PCC was used for the synthesis of WMTA by mixing with tetraethoxyorthosilicate, bismuth oxide, aluminum oxide, catalyst of with HNO3 and NH3 solution and thermally treated at 1100 °C for 3 h. The products were characterized with Thermal Gravimetric Analysis-Differential Thermal Analysis (TGA-DTG), X-ray Diffraction (

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33

Oliveira, Marília Gerhardt de, Cristina Braga Xavier, Flávio Fernando Demarco, Antônio Luis Barbosa Pinheiro, Aline Tempel Costa, and Daniel Humberto Pozza. "Comparative chemical study of MTA and portland cements." Brazilian Dental Journal 18, no. 1 (2007): 3–7. http://dx.doi.org/10.1590/s0103-64402007000100002.

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Portland cement has been analyzed and compared to mineral trioxide aggregate (MTA) because of their chemical similarity. The possibility of using this material as a less expensive alternative to MTA in dental practice should be considered. In view of this, the present study compared the components of a Portland cement (Votoran®) to two commercial brands of MTA (Pro-Root™ and MTA-Angelus®). Twelve specimens of each material were fabricated and examined by scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS) to obtain their percentage of chemical elements. The means of th

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34

Sayed, Mostafa Saad, Debananda Mohapatra, Marjorie Lara Baynosa, and Jae‐Jin Shim. "Three-dimensional core-shell heterostructure of tungsten trioxide/bismuth molybdate/cobalt phosphate for enhanced photoelectrochemical water splitting." Journal of Colloid and Interface Science 598 (September 2021): 348–57. http://dx.doi.org/10.1016/j.jcis.2021.03.105.

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Chen, May-Show, Hsiu-Na Lin, Yu-Chun Cheng, Alex Fang, Chin-Yi Chen, Pee-Yew Lee, and Chung-Kwei Lin. "Effects of Milling Time, Zirconia Addition, and Storage Environment on the Radiopacity Performance of Mechanically Milled Bi2O3/ZrO2 Composite Powders." Materials 13, no. 3 (January 24, 2020): 563. http://dx.doi.org/10.3390/ma13030563.

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Mineral trioxide aggregate (MTA) typically consists of Portland cement (75 wt.%), bismuth oxide (20 wt.%), and gypsum (5 wt.%) and is commonly used as endodontic cement. Bismuth oxide serving as the radiopacifying material reveals the canal filling effect after clinical treatment. In the present study, bismuth/zirconium oxide composite powder was prepared by high energy ball milling of (Bi2O3)100−x (ZrO2)x (x = 5, 10, 15, and 20 wt.%) powder mixture and used as the radiopacifiers within MTA. The crystalline phases of the as-milled powders were examined by the X-ray diffraction technique. The r

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Jenkins, R. O., T.-A. Morris, P. J. Craig, W. Goessler, N. Ostah, and K. M. Wills. "Evaluation of cot mattress inner foam as a potential site for microbial generation of toxic gases." Human & Experimental Toxicology 19, no. 12 (December 2000): 693–702. http://dx.doi.org/10.1191/096032700670028460.

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Recent reports of biovolatilisation of phosphorus and antimony by anaerobic bacteria and of leaching of phosphorus and antimony fire-retardant additives from PVC cot mattress covers, indicate that the polyurethane inner-foam of cot mattresses could be a site for generation of toxic gases of group 15 elements. A toxic gas hypothesis for sudden infant death syndrome (SIDS) involving polyurethane foam of cot mattresses was proposed and tested experimentally. Levels of antimony, phosphorus, arsenic and bismuth were determined at four sites for 44 SIDS and 50 control (no death) cot mattress foams.

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Caliskan, Secil, Nuray Tuloglu, and Sule Bayrak. "Clinical applications of BioAggregate in pediatric dentistry: Case reports." Srpski arhiv za celokupno lekarstvo 147, no. 11-12 (2019): 746–50. http://dx.doi.org/10.2298/sarh190509124c.

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Introduction. Calcium-silicate-based, nanoparticle-sized BioAggregate is produced as an alternative version of mineral trioxide aggregate (MTA). It contains additives such as calcium phosphate and silicon dioxide but does not contain aluminium oxide and bismuth oxide. Studies have shown that BioAggregate?s calcium-ion release is better than these qualities in MTA concerning fracture and acid resistance, biocompatibility and sealing ability. Case outline. In this paper, we examine eight case reports. These reports describe the long-term results of using BioAggregate in areas such as pulpotomy a

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Den, Rethy, Rini Dharmastiti, Nuryono Nuryono, Leny Yuliatun, and Widjijono Widjijono. "Effect of Varying Water-to-Powder Ratios on Compressive Strength and Porosity of Mineral Trioxide Aggregate." Key Engineering Materials 840 (April 2020): 345–50. http://dx.doi.org/10.4028/www.scientific.net/kem.840.345.

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The proportion of MTA powder and water is a common factor impacted on the properties of the material in clinical application. The purpose of this research was to determine the compressive strength and porosity of Mineral Trioxide Aggregate (MTA) mixed with varying water-to-powder (WP) ratios. ROOTDENT MTA was investigated. One gram of cement was mixed with 0.28, 0.33 or 0.40 grams of distilled water and was submerged either for 1, 7, or 28 days in the water. The chemical composition of un-hydrated MTA was characterized by X-ray fluorescence. Samples were carried out for compression and porosit

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Marciano, Marina Angélica, Reginaldo Mendonça Costa, Josette Camilleri, Rafael Francisco Lia Mondelli, Bruno Martini Guimarães, and Marco Antonio Hungaro Duarte. "Assessment of Color Stability of White Mineral Trioxide Aggregate Angelus and Bismuth Oxide in Contact with Tooth Structure." Journal of Endodontics 40, no. 8 (August 2014): 1235–40. http://dx.doi.org/10.1016/j.joen.2014.01.044.

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Fuku, Kojiro, and Kazuhiro Sayama. "Efficient oxidative hydrogen peroxide production and accumulation in photoelectrochemical water splitting using a tungsten trioxide/bismuth vanadate photoanode." Chemical Communications 52, no. 31 (2016): 5406–9. http://dx.doi.org/10.1039/c6cc01605g.

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Güngör, A., İ. K. Akbay, D. Yaşar, and T. Özdemir. "Flexible X/Gamma ray shielding composite material of EPDM rubber with bismuth trioxide: Mechanical, thermal investigations and attenuation tests." Progress in Nuclear Energy 106 (July 2018): 262–69. http://dx.doi.org/10.1016/j.pnucene.2018.03.021.

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Zhang, Mengmeng, Youyi Zhu, Wenjun Li, Fangzhi Wang, Hongda Li, Xintong Liu, Weiwei Zhang, and Chaojun Ren. "Double Z-scheme system of silver bromide@bismuth tungstate/tungsten trioxide ternary heterojunction with enhanced visible-light photocatalytic activity." Journal of Colloid and Interface Science 509 (January 2018): 18–24. http://dx.doi.org/10.1016/j.jcis.2017.08.095.

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Ploska, Ute, Georg Berger, and Manfred Willfahrt. "Dense Sintered Long-Term Stable Ceramics in the System CaO-P₂O₅-ZrO₂-F." Key Engineering Materials 309-311 (May 2006): 267–70. http://dx.doi.org/10.4028/www.scientific.net/kem.309-311.267.

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Abstract (sommario):

The influence of several sinter additives (three glasses, magnesium acetate, bismuth trioxide) on the compressive strength and also on the solubility of a sintered ceramics, which is composed of 57.6Mol% CaO, 26.2Mol% P2O5, 10.4Mol% ZrO2 and 5.8Mol% CaF2 was tested. The amount of sinter additives, pre-mixing of the powders, pressure power, sintering temperature and sintering time were varied. The most dense samples were produced with the finest powders (D50 ~ 1/m) and the highest sintering temperatures (1200°C). The mechanical stability of the samples was more influenced by the particle size o

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Yuan, Ying, Baoqun Geng, Tao Sun, Qingbo Yu, and Haifu Wang. "Impact-Induced Reaction Characteristic and the Enhanced Sensitivity of PTFE/Al/Bi2O3 Composites." Polymers 11, no. 12 (December 10, 2019): 2049. http://dx.doi.org/10.3390/polym11122049.

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In this paper, the reaction characteristic of a novel reactive material, which introduced bismuth trioxide (Bi2O3) into traditional polytetrafluoroethylene/aluminum (PTFE/Al), is studied. The effect of Bi2O3 with different content and particle size on the reaction behaviors of PTFE/Al/Bi2O3 are investigated by drop-weight test and X-ray diffractometer (XRD), including impact sensitivity, energy release performance under a certain impact, and reaction mechanism. The experimental results show that the content of Bi2O3 increased from 0% to 35.616%, the characteristic drop height of impact sensiti

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45

Nie, Yuhan, Yadong Xie, Ying Zheng, Yao Luo, Jianguo Zhang, Zao Yi, Fusheng Zheng, et al. "Preparation of ZnO/Bi2O3 Composites as Heterogeneous Thin Film Materials with High Photoelectric Performance on FTO Base." Coatings 11, no. 9 (September 20, 2021): 1140. http://dx.doi.org/10.3390/coatings11091140.

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In recent years, ZnO nanomaterials have achieved great performance in solar energy applications. How to synthesize a ZnO nanocomposite structure with high photoelectric conversion efficiency has become an urgent problem to solved. In this paper, a narrow band gap bismuth trioxide (Bi2O3) coated on a ZnO nanoarray by magnetron sputtering was used to prepare a composite heterojunction ZnO/Bi2O3. Studies have found that ZnO/Bi2O3 exhibits excellent photoelectric conversion performance. By preparing a composite heterostructure of ZnO/Bi2O3, it can effectively compensate for the insufficient absorp

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46

Coomaraswamy, K. S., P. J. Lumley, R. M. Shelton, and M. P. Hofmann. "Evaluation of Different Radiopacifiers for an MTA-Like Dental Cement." Key Engineering Materials 361-363 (November 2007): 885–88. http://dx.doi.org/10.4028/www.scientific.net/kem.361-363.885.

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The present study evaluated the influence of different radiopacifiers on an established mineral trioxide aggregate (MTA)-like Portland cement system. Commercial MTA contains bismuth oxide (Bi2O3) as the radiopacifier and inert alternatives tested were barium sulphate (BaSO4), lanthanum oxide (La2O3) and tantalum pentoxide (Ta2O5). The radiopacity of the different formulations was measured with densitometry, whilst relative porosity was determined using helium pycnometry and compressive strength was measured as an indicator for the potential longevity of the alternative cement formulations. At

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47

Ke, Jun, Hong-Ru Zhou, Yuan-Yuan Peng, and Di-Yong Tang. "In Situ Construction of a Two-Dimensional Heterojunction by Stacking Bismuth Trioxide Nanoplates with Reduced Graphene Oxide for Enhanced Water Oxidation Performance." Journal of Nanoscience and Nanotechnology 19, no. 9 (September 1, 2019): 5554–61. http://dx.doi.org/10.1166/jnn.2019.16568.

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48

Tokunaga, K., K. Kinugasa, T. Meguro, S. Kawada, K. Sugiu, H. Nakashima, T. Furuta, et al. "Embolization of Cerebral Arteriovenous Malformations with Cellulose Acetate Polymer." Interventional Neuroradiology 4, no. 1_suppl (November 1998): 117–20. http://dx.doi.org/10.1177/15910199980040s125.

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To test the usefulness of a cellulose acetate polymer(CAP) solution for brain arteriovenous malformations (AVMs), we analyzed the clinical and histological results of patients with AVMs embolized using CAP solution. We reviewed the cases of six patients with cerebral AVMs treated by embolization prior to surgical resection. We used two types of CAP solutions, CAP-M and CAP-L, which are mixtures of 250 mg of solid CAP and 1800 or 2250 mg of bismuth trioxide dissolved in 5.5 or 7.0 ml of dimethyl sulfoxide, respectively. All patients underwent surgical resection 1 to 37 days after the embolizati

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49

Uemura, Yohei, Toshihiko Yokoyama, Tetsuo Katayama, Shunsuke Nozawa, and Kiyotaka Asakura. "Tracking the Local Structure Change during the Photoabsorption Processes of Photocatalysts by the Ultrafast Pump-Probe XAFS Method." Applied Sciences 10, no. 21 (November 4, 2020): 7818. http://dx.doi.org/10.3390/app10217818.

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The birth of synchrotron radiation (SR) facilities and X-ray free electron lasers (XFELs) has led to the development of new characterization tools that use X-rays and opened frontiers in science and technology. Ultrafast X-ray absorption fine structure (XAFS) spectroscopy for photocatalysts is one such significant research technique. Although carrier behavior in photocatalysts has been discussed in terms of the band theory and their energy levels in reciprocal space (k-space) based on optical spectroscopic results, it has rarely been discussed where photocarriers are located in real-space (r-s

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50

Nunes, Teresa G. "Influence of Grain Size on the Setting of Portland Cement: A Stray-Field Magnetic Resonance Imaging Study." Materials Science Forum 514-516 (May 2006): 1633–37. http://dx.doi.org/10.4028/www.scientific.net/msf.514-516.1633.

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Abstract (sommario):

A number of failures of large concrete structures during construction have been reported in the last decades [1]. The overestimation of concrete strength at early ages was one of the reasons for the failures. Consequently, reliable information about early age properties of the material is essential to guarantee life-time performance of structures. Portland cement is a complex heterogeneous particulate material and a full knowledge of kinetics of the hydration reactions, for example, is still missing. Gel constitutes the major phase in the hardening cement paste and the corresponding structure

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