| (1-x)CaTiO3-xYAIO3계의 마이크로파 유전특성과 CaB2O4첨가제의 영향 |
| 강보경, 김경용1, 김범수2, 김주선1, 김병호 |
고려대학교 재료공학과
1한국과학기술연구원 나노재료연구센터
2㈜한원마이크로웨이브 |
| Microwave Dielectric Properties of (1-x)CaTiO3-xYAIO3 and its Low Temperature Densification by CaB2O4 Addition |
|
|
|
|
|
|
|
| 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 ${epsilon}_r=47,;Q$times$f_0/=35000;and;{ au}_f=+11;ppm/^{circ}C$ 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 130$0^{circ}C$ for 3 h showed optimum microwave dielectric properties of ${epsilon}_r=47,;Q{ ime}f_0=37000;and;{ au}_f=+17;ppm/^{circ}C,$ which demonstrates the promising candidates for microwave dielectric materials covering 5~7 GHz range. |
| Key words:
Microwave dielectrics, $CaTiO_3$, $YAlO_3$, ${CaB_2}{O_4}$ |
|
|
|
PDF Links
Full text via DOI
Download Citation 
