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J. Korean Ceram. Soc. > Volume 38(11); 2001 > Article
Journal of the Korean Ceramic Society 2001;38(11): 1042.
BZN-SZN계 세라믹스의 마이크로파 유전 특성에 미치는 $ZrO_2$의 영향
윤석규, 박우정, 양우석, 윤대호
성균관대학교 신소재공학과
Effect of $ZrO_2$Addition on the Microwave Dielectric Properties of BZN-SZN System Ceramics
ABSTRACT
Microwave dielectric properties of Ba(Zn$_{1}$3/Nb$_{2}$3/) $O_3$-Sr(Zn$_{1}$3/Nb$_{2}$3/) $O_3$(BZN-SZN) system were investigated as a function of sintering temperature and Zr $O_2$content. Density was increased and the temperature coefficient of resonant frequency (TCF, $tau$$_{f}$) decreased with increasing sintering temperature. However dielectric constant (K) and Q$times$f value did not change markedly with the sintering temperature. For the samples sintered at the same temperature, density, dielectric constant, and Q$times$f value were increased and TCF was decreased with increasing Zr $O_2$concentration. Especially, the dielectric constant of the sample increased with x and exhibited the maximum value ($varepsilon$$_{r}$=41) when x=0.6 at 1575$^{circ}C$ sintered. TCF decreased with x and exhibited the minimum value ($tau$$_{f}$=+0.8ppm/$^{circ}C$) when x=1.0..0.
Key words: BZN-SZN, $ZrO_2$, Microwave, Dielectric properties, TCF
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