| $WO_3$ 첨가량 변화에 따른 $BaTiO_3-3{(1-x)TiO_2-xWO_3}$ 계의 고주파 유전특성 |
| 박찬식, 변재동, 김왕섭1, 김경용1 |
고려대학교 재료공학과
1한국과학기술연구원 세라믹스연구부 |
| The Effect of $WO_3$ Addition on Microwave Dielectric Properties in $BaTiO_3-3{(1-x)TiO_2-xWO_3}$ System |
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| ABSTRACT |
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The effect of WO3 addition on microwave dielectric properties of BaTiO3-3{(1-x)TiO2-xWO3} system was studied. Addition of WO3 to this system resulted in the formation of BaWO4 and Ba2Ti9O20 phases. Both the dielectric constant (K) and the temperature coefficientof resonant frequency (Tf) were decreased with the amount of WO3 addition. The value of Q$times$f0 was increased as the amount of WO3 was increased up to x=0.0275, and then decreased when x exceeded 0.03. At x=0.0275, this ceramic showed excellent microwave proprties of K=34-35, Q$times$f0=50,000-53,000, and near zero ppm/$^{circ}C$ of Tf. |
| Key words:
$BaTiO_3-3{(1-x)TiO_2-xWO_3}$, Microwave dielectric properties |
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