| Ba5Nb4O15 세라믹스의 저온소결 및 마이크로파 유전특성 |
| 김종대, 김응수 |
| 경기대학교 재료공학과 |
| Low Temperature Sintering and Microwave Dielectric Properties of Ba5Nb4O15 Ceramics |
| Jong-Dae Kim, Eung Soo Kim |
| Department of Materials Engineering, Kyonggi University |
|
|
|
|
|
| ABSTRACT |
|
Microwave dielectric properties and the microstructure of $Ba_5Nb_4O_{15}$ ceramics with $PbO-B_2O_3-SiO_2$ glass frit were investigated to reduce the sintering temperature of $Ba_5Nb_4O_{15}$ ceramics as a function of the amount of glass frit from $0.5wt%$ to $10wt%$ and the sintering condition. The sintered density and the microwave dielectric properties of $Ba_5Nb_4O_{15}$ ceramics were remarkably changed with the amount of glass fit which existed as a liquid phase and assisted the densification. $Ba_5Nb_4O_{15}$ with $3wt%$ $PbO-B_2O_3-SiO_2$ glass frit sintered at $900^{circ}C$ for 2 h showed dielectric constant (K) of 41.4, a quality factor (Q $times$f) of 13,485 GHz, and a Temperature Coefficient of resonant Frequency (TCF) of 9 ppm/$^{circ}C$. Due to no trace of physical and chemical reaction between this composition and Ag electrode cofired at $900^{circ}C$ for 2 h, this ceramics can be a good candidate for the multilayer dielectric filter. |
| Key words:
Low temperature sintering, Microwave dielectric property |
|
|
|
PDF Links 
Full text via DOI
Download Citation 
