The effects of soaking time on the grain growth, dielectric and ferroelectric properties of BaTi0.95Zr0.05O3 ceramics prepared by microwave sintering
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- 作者：Zixiong Sun ; Yongping Pu ; Zijing Dong ; Yao Hu ; Xiaoyan Liu ; Peikui Wang
- 关键词：Soaking time ; Grain growth ; Dielectric properties ; Ferroelectric properties ; Microwave sintering
- 刊名：Vacuum
- 出版年：March, 2014
- 年：2014
- 卷：101
- 期：Complete
- 页码：228-232
- 全文大小：1440 K
文摘
Dense ceramics of BaTi1鈭?em>xZrxO3 with x聽=聽0.05 have been prepared by microwave sintering, and the powders were synthetized by conventional hydrothermal method. Microwave sintering was conducted at 1260-1300聽掳C for different soaking times (0.5聽h, 1聽h, 1.5聽h and 2聽h) in air and the hydrothermal processing was conducted at 180聽掳C for 10聽h. The effects of soaking time on the grain growth, dielectric and ferroelectric properties were investigated. The XRD analysis revealed that the synthesized compound was formed with no secondary phases. The ceramics showed a maximum density at soaking time聽=聽1聽h聽30聽min and the SEM micrographs indicated the grain growth of ceramics with increasing soaking time. The model of grain growth was also investigated. The dielectric constant as a function of temperature showed a聽maximum value in permittivity at soaking time聽=聽1聽h聽30聽min on increasing the soaking time. The Pr decreased from 10.27聽渭C/cm2 to 8.44聽渭C/cm2 with increasing soaking time, which can be observed in the P-E loops.