Effects of ceramic processing parameters on the microstructure and dielectric properties of (Ba1-xCax)(Ti0.99-y, ZryMn0.01)O3 sintered in a reducing atmosphere

W. H. Lee*, Tseung-Yuen Tseng, D. Hennings

*此作品的通信作者

    研究成果: Article同行評審

    17 引文 斯高帕斯(Scopus)

    摘要

    The effect of A/B ratio, sintering temperature, and oxygen partial pressure on microstructure and ceramic dielectric properties of 1 mol% MnO2 doped (Ba,Ca)(Ti,Zr,)O3 sintered in a reducing atmosphere were investigated. Microstructure is found to be closely related to processing parameters. With decreasing A/B ratio, decreasing oxygen partial pressure and increasing sintering temperature, grain growth is enhanced. Concurrent with the grain size reduction, the crystal structure transformed from tetragonal to pseudocubic at room temperature and the dielectric constant, the dissipation factor and Curie point all decreased. However, the effects of grain size give a marked discrepancy on breakdown. The effect of A/B ratio and sintering temperature both suggest that breakdown voltage is decreased with increasing grain size. However, the breakdown voltage in relation to grain size by changing the oxygen partial pressure seems to show no significant difference.

    原文English
    頁(從 - 到)123-130
    頁數8
    期刊Journal of Materials Science: Materials in Electronics
    12
    發行號2
    DOIs
    出版狀態Published - 2月 2001

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