Modifying chemical composition of the fine Ni4Nb2O9 powders using chloride melts as reaction medium. (December 2019)

• Record Type: Journal Article
• Authors: Khokhlov, V.; Zakir'yanova, I.; Dokutovich, V.; Shekhtman, G.; Antonov, B.; Korzun, I.; Korotkov, S.; Pankratov, A.; Moskalenko, N.
• Is Part Of: MRS communications. Volume 9:Number 4(2019)
• Page Start: 1300
• Page End: 1305
• Publication Date: 2019-12
• Subjects: Materials -- Periodicals; 620.11
• DOI: 10.1557/mrc.2019.123
• Languages: English
• ISSNs: 2159-6859

Abstract

Abstract: Abstract : Thermal stable chloride melts were used as the reaction medium for modifying the chemical composition of complex oxides ensuring a marked improvement of their working properties. This paper discusses the original results of the direct effect of molten KCl–CoCl2 mixtures on the fine Ni4 Nb2 O9 powders under argon- and oxygen-containing gaseous atmospheres at 500 °C. The initial Ni4 Nb2 O9 powder and the reaction products were studied in detail using the differential scanning calorimetry, thermogravimetry, x-ray diffractometry, Raman and IR spectroscopies, scanning electron microscopy, energy-dispersive x-ray spectroscopy, chemical analysis, and conductometry which demonstrated clearly the formation of the thermal stable single-phase Ni–Co niobates.