Relationship Between the Structures and Reaction Activity for Hydrothermal Synthesis of MZrO3(M=Ba,Sr,Ca)

Abstract

Abstract: For hydrothermal synthesis of MZrO₃(M=Ba,Sr,Ca),the synthetic regularitiesand hydrothermal conditions were investigated, and the reaction process was analyzed on thebasis of the structures and properties of ZrO₂·xH₂O gelate and MZrO₃(M=Ba,Sr,Ca).We proposed that the structure unit formed in the reaction process, in which alkali-earth ioncombined with[Zr₄(OH)₈(H₂O)₁₆]⁸⁺ion.When the structure unit continually grew, the reactive activation energy increased with the decreasing of M²⁺(M=Ba,Sr,Ca)ionic radius,because the incorporation of a smaller A-ion in the perovskite-type structure is accompaniedby rotation of the ZrO₆ octahedra.

Key words: Hydrothermal synthesis, MZrO₃(M=Ba, Sr, Ca), Structure, Reaction activity

TrendMD:

ZHENG Wen-Jun, PANG Wen-Qin. Relationship Between the Structures and Reaction Activity for Hydrothermal Synthesis of MZrO₃(M=Ba,Sr,Ca)[J]. Chem. J. Chinese Universities, 1996, 17(4): 523.

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Relationship Between the Structures and Reaction Activity for Hydrothermal Synthesis of MZrO₃(M=Ba,Sr,Ca)

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