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http://dx.doi.org/10.4191/KCERS.2003.40.1.081

Microwave Dielectric Properties of (1-x)CaTiO3-xYAIO3 and its Low Temperature Densification by CaB2O4 Addition  

강보경 (고려대학교 재료공학과)
김경용 (한국과학기술연구원 나노재료연구센터)
김범수 (㈜한원마이크로웨이브)
김주선 (한국과학기술연구원 나노재료연구센터)
김병호 (고려대학교 재료공학과)
Publication Information
Journal of the Korean Ceramic Society / v.40, no.1, 2003 , pp. 81-86 More about this Journal
Abstract
Microwave dielectric properties have been investigated in the$(1-x)CaTiO_3-xYAlO_3$ (x=0.1~1.0) solid solution system. The mixtures of $CaTiO_3$ and $YalO_3$using solid state method were sintered at various temperatures. Their dielectric constants and related temperature coefficients were strongly depend on the composition of the solid solution. The optimum properties were recorded as for ${\varepsilon}_r=47,$ $Q{\times}f_0$=35000 and ${\tau}_f=+11ppm/^{\circ}C$ without sintering agent. Even at $1200^{\circ}C$ full densification has been achieved with addition of $CaB_2O_4$ in the $0.75CaTiO_3-0.25YalO_3$ composition. The sample of $0.3 wt%-CaB_2O_4$ added $ 0.75CaTiO_3-0.25YalO_3$ sintered at $1300^{\circ}C$ for 3 h showed optimum microwave dielectric properties of ${\varepsilon}_r=47$, $Q{\time}f_0=37000$ and ${\tau}_f=+17ppm/^{\circ}C$, which demonstrates the promising candidates for microwave dielectric materials covering 5~7 GHz range.
Keywords
Microwave dielectrics; $CaTiO_3$; $YAlO_3$; ${CaB_2}{O_4}$;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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