Effects of <TEX>$B_2O_3$</TEX> Addition on the Sintering Behavior and the Microwave Dielectric Properties of <TEX>$(Mg_{0.93}Ca_{0.07})TiO_3$</TEX> Ceramics

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J. Korean Ceram. Soc. > Volume 35(3); 1998 > Article

Journal of the Korean Ceramic Society 1998;35(3): 287.

$(Mg_{0.93}Ca_{0.07})TiO_3$ 세라믹스의 소결 및 마이크로파 유전특성에 미치는 $B_2O_3$의 영향

이득우, 박재환¹, 김인태¹, 박재관¹, 김윤호¹, 최덕균

한양대학교 무기재료공학과
¹한국과학기술연구원 복합기능세라믹스연구센터

Effects of $B_2O_3$ Addition on the Sintering Behavior and the Microwave Dielectric Properties of $(Mg_{0.93}Ca_{0.07})TiO_3$ Ceramics

ABSTRACT

The effects of B2O3 addition on the sintering behavior and th microwave dielectric properties of $(Mg_{0.93}Ca_{0.07})TiO_3$ ceramics were investigated. By addition of $B_2O_3$, increases the density of the ceramics increases and grain growth enhances, It was densified to over 94% of $(Mg_{0.93}Ca_{0.07})TiO_3$ theoretical density by the addition of 0.15-1.0wt% B2O3 and stable microwave dielectric properties observed by the addition of 0.2-0.4wt% $B_2O_3.;(Mg_{0.93}Ca_{0.07})TiO_3$ ceramics sintered at $1200^{circ}C$ exhibits maximum dielectric constants of 24-25 quality factor($Q{times}f$) of more than 70000 and temperature coefficient of resonant frequency of $0;ppm/^{circ}C$ by adding of 0.15-0.4wt% $B_2O_3$.

Key words: Microwave ceramics, $(Mg_{0.93}Ca_{0.07})TiO_3$, Quality factor, Low temperature sintering