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J. Korean Ceram. Soc. > Volume 41(5); 2004 > Article
Journal of the Korean Ceramic Society 2004;41(5): 401.
doi: https://doi.org/10.4191/kcers.2004.41.5.401
Ti와 W이 첨가된 SBT 세라믹스의 강유전 특성
천채일, 김정석
호서대학교 신소재공학과
Ferroelectric Properties of Ti-Doped and W-Doped SBT Ceramics
Undoped SrB $i_2$T $a_2$O$_{9}$, donor-doped Sr$_{0.99}$B $i_2$(Ta$_{0.99}$W$_{0.01}$)$_2$O$_{9}$ and acceptor-doped SrB $i_2$(Ta$_{0.99}$Ti$_{0.01}$)$_2$O$_{8.99$ ceramics were prepared and their microstructure, ferroelectric P-E hysteresis and Curie temperature were investigated. Grain size did not influence P-E hysteresis curve in undoped SrB $i_2$T $a_2$O$_{9}$ ceramics. Donor-Doped Sr$_{0.99}$B $i_2$(Ta$_{0.99}$W$_{0.01}$)$_2$O$_{9}$ ceramics showed more saturated P-E hysteresis curve with larger remanent polarization (P$_{r}$) than undoped SrB $i_2$T $a_2$O$_{9}$ ceramics while acceptor-doped SrB $i_2$(Ta$_{0.99}$Ti$_{0.01}$)$_2$O$_{8.99}$ ceramics led to a pinched P-E hysteresis loop. Larger polarization in donor-doped Sr$_{0.99}$B $i_2$(Ta$_{0.99}$W$_{0.01}$)$_2$O$_{9}$ ceramics resulted from easier domain wall motion by Sr-vacancies.
Key words: SBT ceramics, Doping, Nonstoichiomety, Ferroelectric property, P-E hysteresis, Polarization
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