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Journal articles on the topic 'Cobalt – Minerais – Ferrites de cobalt'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Lazdovica, Kristīne, and Valdis Kampars. "Influence of Crystallite Size of Nickel and Cobalt Ferrites on the Catalytic Pyrolysis of Buckwheat Straw by Using TGA-FTIR Method." Key Engineering Materials 903 (November 10, 2021): 69–74. http://dx.doi.org/10.4028/www.scientific.net/kem.903.69.

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Pyrolysis of buckwheat straw with or without catalysts was investigated using the TGA-FTIR method to determine the influence of nickel and cobalt ferrites on the distribution of pyrolysis products. According to the obtained results, the overall shape of the thermogravimetric and derivative thermogravimetric curves is unchanged in the presence of nickel and cobalt ferrites but different weight losses were observed. All catalysts contribute to the formation of solid residue from BWS pyrolysis. The presence of cobalt ferrites exhibited the highest bio-oil yields, whereas the highest non-condensab

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2

Gupta, Priyanka, and Dr Ravi Kumar Vijai. "Synthesis, Characterization and Dielectric properties of Nanoparticles of Cobalt Doped Ferrite (Cox Fe1-x Fe2 O4)." International Journal of Chemistry, Mathematics and Physics 7, no. 4 (2023): 1–8. http://dx.doi.org/10.22161/ijcmp.7.4.1.

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Ferrites, a recently uncovered category of materials, have found extensive application in various critical domains. Among them, cobalt ferrites stand out as hard magnetic materials with exceptional coercivity.. We successfully prepared cobalt ferrites by using nanocrystalline powers by Sol gel method. In our study Crystalline, Magnetic nanoparticles of Cobalt ferrites (Cox Fe1-x Fe2 O4) (x = 0.4, 0.5, 0.6, 0.8) were synthesized by Sol Gel Method using ferric chloride and cobalt nitrate with NaOH as a reactant. Structural characteristics of samples were determined by X-Ray diffraction and TEM.

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3

de la Torre, Ernesto, Ana Lozada, Maricarmen Adatty, and Sebastián Gámez. "Activated Carbon-Spinels Composites for Waste Water Treatment." Metals 8, no. 12 (2018): 1070. http://dx.doi.org/10.3390/met8121070.

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Nowadays, mining effluents have several contaminants that produce great damage to the environment, cyanide chief among them. Ferrites synthesized from transition metals have oxidative properties that can be used for cyanide oxidation due to their low solubility. In this study, cobalt and copper ferrites were synthesized via the precipitation method, using cobalt nitrate, copper nitrate, and iron nitrate as precursors in a molar ratio of Co or Cu:Fe = 1:2 and NaOH as the precipitating agent. The synthesized ferrites were impregnated in specific areas on active carbon. These composites were char

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4

Boss, Alan F. N., Antonio C. C. Migliano, and Ingrid Wilke. "The Influence of Stoichiometry on the Index of Refraction of Cobalt Ferrite Samples at Terahertz Frequencies." MRS Advances 2, no. 58-59 (2017): 3663–66. http://dx.doi.org/10.1557/adv.2017.355.

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ABSTRACT We report an experimental study on the terahertz frequency dielectric properties of manganese cobalt ferrites (MnxCo1−xFe2O4) and nickel cobalt ferrites (NixCo1-xFe2O4) with three different stoichiometry each, x=0.3, x=0.5 and 0.7. Particularly, we present a comparison and discussion of the terahertz frequency indices of refraction of these two ferrites compositions. MnxCo1−xFe2O4 and NixCo1-xFe2O4 pellets with different Mn/Co and Ni/Co ratios (x=0.3, x=0.5 and x=0.7) were prepared by state-of-the-art ceramic processing. The morphology and chemical homogeneity of these ferrites were c

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5

Martin Cabañas, B., S. Leclercq, P. Barboux, M. Fédoroff, and G. Lefèvre. "Sorption of nickel and cobalt ions onto cobalt and nickel ferrites." Journal of Colloid and Interface Science 360, no. 2 (2011): 695–700. http://dx.doi.org/10.1016/j.jcis.2011.04.082.

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6

Assem, E. E., A. M. Abden, and O. M. Hemada. "Thermal Properties of Cobalt Cadmium Ferrites." Key Engineering Materials 224-226 (June 2002): 831–34. http://dx.doi.org/10.4028/www.scientific.net/kem.224-226.831.

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7

Kale, G. M., and T. Asokan. "Electrical properties of cobalt‐zinc ferrites." Applied Physics Letters 62, no. 19 (1993): 2324–25. http://dx.doi.org/10.1063/1.109405.

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8

Lenglet, M., F. Hochu, and J. Dürr. "Optical Properties of Mixed Cobalt Ferrites." Le Journal de Physique IV 07, no. C1 (1997): C1–259—C1–260. http://dx.doi.org/10.1051/jp4:19971100.

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9

Caltun, Ovidiu, Ioan Dumitru, Marcel Feder, Nicoleta Lupu, and Horia Chiriac. "Substituted cobalt ferrites for sensors applications." Journal of Magnetism and Magnetic Materials 320, no. 20 (2008): e869-e873. http://dx.doi.org/10.1016/j.jmmm.2008.04.067.

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10

Haiduk, Yu S., E. G. Petrova, J. A. Fedotova, et al. "Ferrites of cobalt and cobalt-zinc for magnetorheological materials: Preparation and properties." Next Materials 8 (July 2025): 100652. https://doi.org/10.1016/j.nxmate.2025.100652.

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11

Nandiyanto, Asep Bayu Dani, Yustika Desti Yolanda, Mia Widyaningsih, et al. "Techno-Economic Evaluation of the Production of Dysprosium-Doped Cobalt Ferrites Nanoparticles by Sol-Gel Auto-Combustion Method." Mathematical Modelling of Engineering Problems 9, no. 4 (2022): 1152–59. http://dx.doi.org/10.18280/mmep.090435.

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The purpose of this study was to examine two models of the economic feasibility of producing nanoparticle of dysprosium-doped cobalt ferrites by sol-gel auto-combustion method, from a laboratory scale to an industrial scale, including technical analysis and economic evaluation. Various economic evaluation parameters were analyzed to report the fabrication potential of dysprosium-doped cobalt ferrites nanoparticles in the case of the time required for a speculation to recover its total initial expenditure (PBP), the conditions of a generating project in the production function in years (CNPV),

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12

Othéro de Brito, Vera Lúcia, Stéphanie Alá Cunha, Ana Paula Ribeiro Uchoas, Fabiana Faria de Araújo, Cristina Bormio Nunes, and Luis Antonio Genova. "Evaluation of the Sinterability of Copper-Substituted Ferrites by Means of Dilatometric Thermal Analysis." Materials Science Forum 805 (September 2014): 254–59. http://dx.doi.org/10.4028/www.scientific.net/msf.805.254.

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Cobalt and cobalt-manganese spinel ferrites have magnetostrictive properties suitable for application in magneto-electric and magneto-mechanical transducers. In this work, copper-substituted ferrites of these compositions were processed by means of the ceramic method and their sinterabilities were evaluated by dilatometric thermal analyses. The results obtained suggest that copper affects the solid-state reactions for the spinel formation and lowers the required sintering temperature for the ferrites. However, the densification obtained with sintering of the copper-substituted ferrites at 950o

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13

Velinov, Nikolay, Kremena Koleva, Tanya Tsoncheva, et al. "Copper-cobalt ferrites as catalysts for methanol decomposition." Open Chemistry 12, no. 2 (2014): 250–59. http://dx.doi.org/10.2478/s11532-013-0371-8.

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AbstractCopper-cobalt ferrites with composition Cu1−xCoxFe2O4, where x= 0.2 and 0.8 were prepared by thermal treatment of co-precipitated precursor. The obtained materials were characterized by TG-DSC, XRD, Transmission and Conversion Electron Mössbauer spectroscopy and temperature programmed reduction with hydrogen. The catalytic properties of ferrites were tested in methanol decomposition to CO and hydrogen.

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14

Bushkova, V. S., I. P. Yaremiy, B. K. Ostafiychuk, V. V. Moklyak, and A. B. Hrubiak. "Mössbauer Study of Nickel-Substituted Cobalt Ferrites." Journal of Nano- and Electronic Physics 10, no. 3 (2018): 03013–1. http://dx.doi.org/10.21272/jnep.10(3).03013.

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15

Blesa, Miguel A., Alberto J. G. Maroto, and Pedro J. Morando. "Dissolution of cobalt ferrites by thioglycolic acid." Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases 82, no. 8 (1986): 2345. http://dx.doi.org/10.1039/f19868202345.

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16

Corral-Flores, Veronica, Dario Bueno-Baques, Anatoliy V. Glushchenko, et al. "Magnetic Properties of Spinel Cobalt–Manganese Ferrites." IEEE Transactions on Magnetics 51, no. 4 (2015): 1–4. http://dx.doi.org/10.1109/tmag.2014.2357172.

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17

Noor, Saroaut, M. A. Hakim, S. S. Sikder, S. Manjura Hoque, Kazi Hanium Maria, and Per Nordblad. "Magnetic behavior of Cd2+ substituted cobalt ferrites." Journal of Physics and Chemistry of Solids 73, no. 2 (2012): 227–31. http://dx.doi.org/10.1016/j.jpcs.2011.10.038.

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18

Venudhar, Y. C., and K. Satya Mohan. "Dielectric behaviour of lithium–cobalt mixed ferrites." Materials Letters 54, no. 2-3 (2002): 135–39. http://dx.doi.org/10.1016/s0167-577x(01)00551-1.

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19

Venudhar, Y. C., and K. Satya Mohan. "Elastic behaviour of lithium–cobalt mixed ferrites." Materials Letters 55, no. 3 (2002): 196–99. http://dx.doi.org/10.1016/s0167-577x(01)00645-0.

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20

Song, J. M., and J. G. Koh. "Studies of polycrystalline cobalt-substituted lithium ferrites." IEEE Transactions on Magnetics 32, no. 2 (1996): 411–15. http://dx.doi.org/10.1109/20.486525.

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21

Pannaparayil, T., and S. Komarneni. "Synthesis and characterization of ultrafine cobalt ferrites." IEEE Transactions on Magnetics 25, no. 5 (1989): 4233–35. http://dx.doi.org/10.1109/20.42579.

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22

Rao, K. Srinivasa, A. Mahesh Kumar, M. Chaitanya Varma, G. S. V. R. K. Choudary, and K. H. Rao. "Cation distribution of titanium substituted cobalt ferrites." Journal of Alloys and Compounds 488, no. 1 (2009): L6—L9. http://dx.doi.org/10.1016/j.jallcom.2009.08.086.

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23

Hochu, F., and M. Lenglet. "Co(II) Optical Absorption in Spinels: Infrared and Ligand-Field Spectroscopic Study of the Ionicity of the bond. Magnetic Structure and Co2+→Fe3+MMCT in Ferrites. Correlation with the Magneto-Optical Properties." Active and Passive Electronic Components 20, no. 3 (1998): 169–87. http://dx.doi.org/10.1155/1998/16871.

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The analysis of the infrared and ligand field spectra of COM2O4spinels reveals that the ionicity of these compounds varies in the following order aluminate > gallate > ferrite and chromite > rhodite and cobaltite. A linear relation has been established between the Δ(LO-TO)1splitting, Racah parameter and the ionic-covalent parameterSSp=ΣICP+tetra∑ICPocta. The influence of strong superexchange interactions on the optical spectrum of cobalt ferrites has been studied. The cation distribution has been established by EXAFS and XANES measurements. The cluster (CoFeO10)15–is characterized by

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24

Hsiang, Hsing-I., Jui-Huan Tu, Wen-Chin Kuo, Chi-Yao Tsai, and Li-Then Mei. "Cobalt oxide addition effects on the microstructure and electronic properties of CuZn ferrites." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2015, CICMT (2015): 000131–38. http://dx.doi.org/10.4071/cicmt-tp46.

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The effects of cobalt oxide addition on the microstructure and electrical properties of CuZn ferrites were investigated. CuZn ferrites with compositions of (CuO)0.2(ZnO)0.8(Co3O4)x/3 (Fe2O3) 0.986-2x; x = 0 , 0.02, 0.04, 0.08, 0.1 were synthesized using a solid state reaction. It was observed that the addition of cobalt will change the amounts and distribution of Cu2+, Cu+, Fe2+, and Fe3+ in the grain and grain boundary. The segregation of copper ions at the grain boundary was observed as the substitution of cobalt was increased. Moreover, as the x value was increased above 0.04, second phases

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25

Pussi, Katariina, Keying Ding, Bernardo Barbiellini, et al. "Atomic Structure of Mn-Doped CoFe2O4 Nanoparticles for Metal–Air Battery Applications." Condensed Matter 8, no. 2 (2023): 49. http://dx.doi.org/10.3390/condmat8020049.

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We discuss the atomic structure of cobalt ferrite nanoparticles doped with Mn via an analysis based on combining atomic pair distribution functions with high energy X-ray diffraction and high-resolution transmission electron microscopy measurements. Cobalt ferrite nanoparticles are promising materials for metal–air battery applications. Cobalt ferrites, however, generally show poor electronic conductivity at ambient temperatures, which limits their bifunctional catalytic performance in oxygen electrocatalysis. Our study reveals how the introduction of Mn ions promotes the conductivity of the c

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26

Gupta, Priyanka, Dr Ravi Kumar Vijai, and Subhash Chander. "Synthesis, Characterization and Magnetic properties of Nanoparticles of Cobalt Doped Ferrite." International Journal of Chemistry, Mathematics and Physics 6, no. 5 (2022): 06–11. http://dx.doi.org/10.22161/ijcmp.6.5.2.

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Ferrites are ceramic like material having magnetic properties which are being utilized for several applications. Cobalt ferrites are hard magnetic material with high coercivity. In our study Crystalline, Magnetic nanoparticles of Cobalt ferrite Co0.8Fe2.2O4 were synthesized by Sol Gel Method using ferric chloride and cobalt nitrate with NaOH as a reactant. Structural characteristics of samples were determined by X-Ray diffraction, FESEM and TEM. Particle size found 14.26nm by using Debye Scherrer method. Scanning electron microscopic (SEM) studies revealed nano-crystalline nature of the sample

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27

Frolova, Liliya A. "Investigation of Magnetic and Photocatalytic Properties of CoFe₂O₄ Doped La³⁺, Nd³⁺, I³⁺." ECS Meeting Abstracts MA2022-01, no. 30 (2022): 2496. http://dx.doi.org/10.1149/ma2022-01302496mtgabs.

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Cobalt ferrites are widely used for permanent magnets, magnetic fluids, microwave devices, high density information storage and environmental technologies. The properties of nanosized magnetic materials strongly depend on the shape, size, and phase composition of the particles. The great interest of researchers in nanosized materials in recent years is associated with the possibility of changing the properties of magnetic materials by controlling the particle size and distribution of cations over sublattices in ferrite [1]. Nanoparticles of doped cobalt ferrite showed improved physicochemical

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28

Venkateshwarlu, Ch, M. Ramesh, G. Vinod, et al. "The Structural and Electrical Studies on Cu-Co Ferrites." IOP Conference Series: Materials Science and Engineering 1221, no. 1 (2022): 012014. http://dx.doi.org/10.1088/1757-899x/1221/1/012014.

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Abstract The system Cobalt substituted copperferritesampleswere synthesized by a conventional double sintering ceramic method.A series of doped Copper ferrites withcomposithion Cu1-xCoxFe2O4 (x = 0.2, 0.4, and 0.6 ) are synthesized. The X-raydiffraction pattern at room temperature show that the sample exists in single phase with a spinel structure.Copper-Cobalt ferrites seriesaretakenand their electrical conductivityproperty are studied with a variation of composition and temperature. Log (σT) vs 103/T is almost linear with a variation close to the temperature of Curie.In general, the paramagn

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29

Liu, Binghai, Jun Ding, Jiabao Yi, Jianhua Yin, and Zhili Dong. "Magnetic Anisotropies in Cobalt-Nickel Ferrites (NixCo1-xFe2O4)." Journal of the Korean Physical Society 52, no. 5 (2008): 1483–86. http://dx.doi.org/10.3938/jkps.52.1483.

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30

Gingasu, Dana, Lucian Diamandescu, Ioana Mindru, et al. "Chromium Substituted Cobalt Ferrites by Glycine-Nitrates Process." Croatica Chemica Acta 88, no. 4 (2015): 445–51. http://dx.doi.org/10.5562/cca2743.

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31

Franco, A., F. L. A. Machado, V. S. Zapf, and F. Wolff-Fabris. "Enhanced magnetic properties of Bi-substituted cobalt ferrites." Journal of Applied Physics 109, no. 7 (2011): 07A745. http://dx.doi.org/10.1063/1.3565406.

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32

Ardizzone, Silvia, Alba Chittofrati, and Leonardo Formaro. "Iron(II) cobalt ferrites. Preparation and interfacial behaviour." Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases 83, no. 4 (1987): 1159. http://dx.doi.org/10.1039/f19878301159.

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33

Blasco, J., G. Subías, J. García, C. Popescu, and V. Cuartero. "High-pressure transformation in the cobalt spinel ferrites." Journal of Solid State Chemistry 221 (January 2015): 173–77. http://dx.doi.org/10.1016/j.jssc.2014.09.028.

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34

El-Saadawy, M., and M. M. Barakat. "Electrical conductivity of cobalt-doped BaZn hexagonal ferrites." Journal of Magnetism and Magnetic Materials 205, no. 2-3 (1999): 319–22. http://dx.doi.org/10.1016/s0304-8853(99)00447-3.

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35

Tourinho, Francisco Augusto, Raymonde Franck, and Ren� Massart. "Aqueous ferrofluids based on manganese and cobalt ferrites." Journal of Materials Science 25, no. 7 (1990): 3249–54. http://dx.doi.org/10.1007/bf00587682.

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36

Ardizzone, Silvia, and Leonardo Formaro. "Surface defectivity and pHp.z.c. of cobalt ferrous ferrites." Colloids and Surfaces 34, no. 3 (1988): 247–54. http://dx.doi.org/10.1016/0166-6622(88)80103-3.

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37

Ramana Reddy, A. V., G. Ranga Mohan, B. S. Boyanov, and D. Ravinder. "Electrical transport properties of zinc-substituted cobalt ferrites." Materials Letters 39, no. 3 (1999): 153–65. http://dx.doi.org/10.1016/s0167-577x(98)00234-1.

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38

Arean, C. Otero, J. L. Rodriguez Blanco, J. M. Rubio Gonzalez, and M. C. Trobajo Fernandez. "Structural characterization of polycrystalline gallium-substituted cobalt ferrites." Journal of Materials Science Letters 9, no. 2 (1990): 229–30. http://dx.doi.org/10.1007/bf00727726.

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39

Abellän, J., and M. Ortuño. "The Verwey Transition in Polycrystalline Cobalt-Iron Ferrites." physica status solidi (a) 96, no. 2 (1986): 581–86. http://dx.doi.org/10.1002/pssa.2210960226.

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40

Al-Kadhi, Nada S., Ghadah M. Al-Senani, Rasmiah S. Almufarij, Omar H. Abd-Elkader, and Nasrallah M. Deraz. "Green Synthesis of Nanomagnetic Copper and Cobalt Ferrites Using Corchorus Olitorius." Crystals 13, no. 5 (2023): 758. http://dx.doi.org/10.3390/cryst13050758.

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This study aims to develop a self-combustion method for use in the preparation of copper and cobalt ferrites. This development was based on the full use of dry leaves of Corchorus olitorius plant in order to stimulate the preparation of the studied ferrites by making full use of the small amount of carbon produced from the combustion process. The fabrication of CuFe2O4 and CoFe2O4 with spinel-type structures and the Fd3m space group is confirmed by XRD and FTIR investigations. Two major vibration bands occur laterally at 400 cm−1 and 600 cm−1. We were able to understand the existence of two st

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41

Islam, M. A., A. K. M. Akther Hossain, M. Z. Ahsan, et al. "Structural characteristics, cation distribution, and elastic properties of Cr³⁺ substituted stoichiometric and non-stoichiometric cobalt ferrites." RSC Advances 12, no. 14 (2022): 8502–19. http://dx.doi.org/10.1039/d1ra09090a.

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42

Zhang, Chang Sen, Lei Yang, and Feng Zhou. "Preparation and Microstructure of Co-Ferrite Fine Powder." Advanced Materials Research 328-330 (September 2011): 1365–68. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.1365.

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Cobalt ferrites were prepared by citrate sol-gel method, chemical co-precipitation, mechanical grinding, respectively. The grain size, morphology, and the size of crystal particles were studied by x-ray diffraction (XRD) and scanning electron microscope (SEM). Cobalt ferrite showed different morphologys when prepared by different methods, It was tapered corners which prepared by sol-gel method; It was tetrahedral which prepared by mechanical grinding method; It was sphere which prepared by chemical co-precipitation method. The average grain size of cobalt ferrite was less than 100nm, while par

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43

Torquato, Mattheus, Magno de Assis Verly Heringer, Eliel Gomes da Silva Neto, Emilson Ribeiro Viana Junior, and Ronaldo Sergio de Biasi. "Influence of cerium doping on the magnetic properties of a nanometric cobalt-zinc mixed ferrite." OBSERVATÓRIO DE LA ECONOMÍA LATINOAMERICANA 22, no. 7 (2024): e5723. http://dx.doi.org/10.55905/oelv22n7-109.

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This study investigates the influence of cerium doping on the magnetic properties of nanometric-sized particles of a cobalt-zinc mixed ferrite with stoichiometric formula Co0.6Zn0.4Fe2O4. The effect of cerium doping was studied by producing a ferrite with the stoichiometric formula Co0.6Zn0.4Fe1.95Ce0.05O4 and comparing its magnetic properties with those of undoped cobalt-zinc ferrite and other ferrites. The samples were synthesized by sol-gel combustion and characterized by X-ray diffraction (XRD), vibrating-sample magnetometry (VSM) and ferromagnetic resonance (FMR). The XRD results confirm

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44

El-Salam, Asmaa Reda Abd, K. E. Rady, Ezzat A. ELFadaly, and Mobarak Hassan Aly. "Enhanced Structural and Morphological Properties of Doped Cobalt Zinc Ferrite." Journal of Nanotechnology and Nanomaterials 4, no. 2 (2023): 89–93. http://dx.doi.org/10.33696/nanotechnol.4.046.

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In this study, Mn2+ substituted Co0.8−x Mnx Zn0.2 (where x = 0.0, 0.1, 0.2, and 0.3) ferrites are prepared by a coprecipitation method to study the effect of Mn2+ions on the structural and morphological properties. These ferrites are characterized by X-ray powder diffraction (XRD), and Fourier transform infrared. X-ray diffraction patterns of the prepared samples confirm partial substitution of Mn2+ ions that does not change the basic structure of Co0.8 Zn0.2 Fe2O4. It also provides information about the formation of a single-phase spinel structure without any secondary phase. It is concluded

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45

Majid, Farzana, Amarah Nazir, Sadia Ata, et al. "Effect of Hydrothermal Reaction Time on Electrical, Structural and Magnetic Properties of Cobalt Ferrite." Zeitschrift für Physikalische Chemie 234, no. 2 (2020): 323–53. http://dx.doi.org/10.1515/zpch-2019-1423.

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AbstractCobalt ferrite was synthesized by hydrothermal route in order to investigate the effect of hydrothermal reaction time on structural, magnetic and dielectric properties. The synthesized cobalt ferrite was characterized by X-ray diffraction, Fourier transform infrared and Vibrating-Sample Magnetometer (VMS). XRD data analysis confirmed the formation of cubic inverse spinel ferrite for complete time series as the high intensity peak corresponds to cubic normal spinel structure. The ionic radii, cation distribution among tetrahedral and octahedral sites, lattice parameters, X-ray density,

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46

Amaro, Luís, Daniela Correia, Teresa Marques-Almeida, et al. "Tailored Biodegradable and Electroactive Poly(Hydroxybutyrate-Co-Hydroxyvalerate) Based Morphologies for Tissue Engineering Applications." International Journal of Molecular Sciences 19, no. 8 (2018): 2149. http://dx.doi.org/10.3390/ijms19082149.

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Polymer-based piezoelectric biomaterials have already proven their relevance for tissue engineering applications. Furthermore, the morphology of the scaffolds plays also an important role in cell proliferation and differentiation. The present work reports on poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV), a biocompatible, biodegradable, and piezoelectric biopolymer that has been processed in different morphologies, including films, fibers, microspheres, and 3D scaffolds. The corresponding magnetically active PHBV-based composites were also produced. The effect of the morphology on physico-che

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47

Mujahid, Muhammad, Hasan M. Khan, Zartasha Sarwar, et al. "Synthesis and Characterization of Aluminium and Cobalt substituted W type Hexagonal Ferrites." JOURNAL OF NANOSCOPE (JN) 1, no. 2 (2020): 65–72. http://dx.doi.org/10.52700/jn.v1i2.15.

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Our work utilized sol-gel auto combustion method for M-type ferrites synthesis with hexagonal orientation having chemical composition Ca (1-X) AlXCo2Fe16O22. Annealing of the samples was performed for 8 hours at 1200oC. Structural properties and grain morphology of the synthesized samples included X-ray diffraction (XRD), Fourier transforming infrared spectroscopy (FTIR), Ultraviolet visible spectroscopy techniques and scanning electron microscope (SEM). The XRD analysis verified that all samples exhibited single-phase crystalline hexagonal w-type structure at a temperature range of 1200oC wit

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48

Rana, Rahul, Ranjeet Kaur, Vaseem Raja, and Ajay Kumar. "Exploring the Potential of Cobalt ferrites in the Supercapacitors Applications." E3S Web of Conferences 509 (2024): 03005. http://dx.doi.org/10.1051/e3sconf/202450903005.

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Abstract:

Supercapacitors have emerged as efficient energy storage devices for future autonomous gadgets due to their exorbitant power density, quick charging/discharging abilities, with prolonged cycle life. However, to meet demands such as high energy density and superior electrochemical performance, it is imperative to investigate different electrode materials. Primarily, electrode materials with a catholic potential range, low cost, and high specific capacitance are highly sought-after for supercapacitor applications. The cobalt ferrites (CoFe2O4) have emerged as materials with extraordinary specifi

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49

Khan, Amrita, Mahabub Alam Bhuiyan, Golam Dastegir Al Quaderi, et al. "Dielectric and transport properties of Zn-substituted cobalt ferrites." Journal of Bangladesh Academy of Sciences 37, no. 1 (2013): 73–82. http://dx.doi.org/10.3329/jbas.v37i1.15683.

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Effect of Zn content on the dielectric and transport properties of CoZnxFe2-xO4 (x = 0.0, 0.1, 0.2, 0.3 and 0.4), prepared by standard double sintering ceramic technique, sintered at 1000°C for 4 hours were investigated. The X-ray diffraction (XRD) pattern of the prepared samples showed single phase inverse-spinel structure without any detectable impurity. Lattice constant of the samples increased with the increasing Zn concentration which follows Vegards law. The theoretical densities of these samples remained almost constant whereas the bulk density decreased with Zn content up to x = 0.2.

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50

Ullah, Muhammad Samir, Kaniz Fatama, Md Firoz Uddin, and Mohammad Mizanur Rahman. "Magnetic Properties of Cobalt Substituted Nickel-Zinc Mixed Ferrites." Journal of Magnetics 26, no. 2 (2021): 216–20. http://dx.doi.org/10.4283/jmag.2021.26.2.216.

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