Influence of Liquid Phase on Grain Growth of Ba_0.998La_0.002TiO₃ Ceramics

Abstract:

The influence of liquid phase on grain growth of Ba0.998La0.002TiO3+xmol%TiO2 (x=0~5.0) ceramics sintered at 1350°C was investigated. The result showed that the liquid phase must present during grain growth; on the other hand, BaTiO3 grains must be dissolved, and then, precipitated from the liquid phase during the process of dissolution-precipitation. Otherwise, the grain growth was inhibited. The liquid phases of Ba6Ti17O4 and Ba2TiSi2O8 promoted grain growth due to high solution of BaTiO3 grains in the liquid phases. Ba2Ti2SiP2O13 liquid phase inhibited grain growth since BaTiO3 grains cannot dissolve into the phase, consequently the samples showed insulating behaviour.

• Periodical: Key Engineering Materials (Volumes 368-372)
• Pages: 461-464
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.368-372.461
• Online since: February 2008
• Authors: Yong Ping Pu, Gong An Yang, Yun He Liang, Wen Hu Yang, Jin Fei Wang
• Keywords: Ba_0.998La_0.002TiO₃ Ceramics, Grain Growth, Liquid Phase, TiO₂-Excess Additive

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