Modification of the Cationic Composition of LiNbO3 and LiTaO3 Nanopowders in Calcium-Containing Chloride Melts
Authors:
- 1 February 2020
- journal article
- research article
- Published by Pleiades Publishing Ltd in Russian Metallurgy (Metally)
- Vol. 2020 (2) , 144-149
Abstract
The ionic compositions of lithium metaniobate and metatantalate nanopowders are modified in calcium-containing chloride melts. The reaction products are studied by X-ray diffraction, Raman spectroscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, and elemental chemical analysis. The results of the studies show that the surface layer of the modified small-size particles of the lithium niobate or lithium tantalate powders is enriched in calcium metaniobate or metatantalate (CaNb2O6 or CaTa2O6) formed due to the isomorphic heterovalent substitution of calcium ions for lithium ions in molten LiCl–CaCl2 and KCl–CaCl2 mixtures at 700 and 750°C.Keywords
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