Features of Phase Formation of Pyrochlore-type Ceramics Bi₂Mg(Zn)_1-x Ni _x Ta₂O₉.

ABSTRACT: The phase formation of complex pyrochlores (space group Fd-3m) Bi₂Mg(Zn)_1-x Ni _x Ta₂O₉ was investigated during solid-phase synthesis. It was found that the pyrochlore phase precursor in all cases was α-BiTaO₄. The pyrochlore phase synthesis reaction proceeds mainly at temperatures above 850-900 °C and consists in the interaction of bismuth orthotantalate with a transition element oxide. The influence of magnesium and zinc on the course of pyrochlore synthesis was revealed. The reaction temperatures of magnesium and nickel (800 and 750 °C, respectively) were determined. The change in the pyrochlore unit cell parameter depending on the synthesis temperature was analyzed for both systems. Nickel-magn

SUBMITTER: Zhuk NA 

PROVIDER: S-EPMC10061534 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature