Bulletin of Materials Science | |
Preparation of nanocrystalline Mg4Nb2O9 by citrate gel method | |
关键词: Ceramics; oxides; electron microscopy; X-ray methods; magnesium niobate.; | |
学科分类:材料工程 | |
来源: Indian Academy of Sciences | |
【 摘 要 】
A gel was formed when a aqueous solution of Mg(NO3)2, NbF5 and citric acid in stoichiometric ratio was heated on a water bath. No precipitation was observed at acidic pH and gellation was complete with evaporation of the solvent. This gel on decomposition at 750°C produced nanocrystallites of ternary oxide, Mg4Nb2O9 (M4N2). The phase contents and lattice parameters were studied by powder X-ray diffraction (XRD) at various temperatures. Particle size and morphology were studied by transmission electron spectroscopy (TEM). For comparison, M4N2 powders were also prepared by conventional ceramic route at 900°C.
【 授权许可】
CC BY
【 预 览 】
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RO201902183635953ZK.pdf | 48KB | download |