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J. Korean Ceram. Soc. > Volume 43(2); 2006 > Article
Journal of the Korean Ceramic Society 2006;43(2): 92.
doi: https://doi.org/10.4191/kcers.2006.43.2.092
BaSn(BO3)2세라믹스의 저온소결 및 유전특성
남명화, 김효태1, 황준철, 남중희1, 여동훈1, 김종희1, 남산
고려대학교 재료공학부
1요업기술원 시스템모듈사업단
Low-Temperature Sintering and Dielectric Properties of BaSn(BO3)2 Ceramics
Myung-Hwa Nam, Hyo-Tae Kim1, June-Cheol Hwang, Joong-Hee Nam1, Dong-Hoon Yeo1, Jong-Hee Kim1, Sahn Nahm
Department of Materials Science and Engineering, Korea University
1Korea Institute of Ceramic Engineering and technology
ABSTRACT
Dolomite type $BaSn(BO_3)_2$ ceramics with rhombohedral crystal structure has been synthesized via solid state reaction route. Dielectric properties were measured for the samples sintered at $1050~1200^{circ}C$ for 2 h in air. Dielectric constant, loss tangent, and temperature coefficient were increased with sintering temperature due to the evolution of $BaSnO_3$, secondary, phase. Optimum dielectric properties were obtained at the $BaSn(BO_3)_2$ ceramics sintered at $1100^{circ}C.;CuO/Bi_2O_3$ was added to $BaSn(BO_3)_2$ ceramics to lower the sintering temperature for LTCC application, then Co and Fe-based coloring agents were added for colorizing the LTCC tape. Typical dielectric properties of $BaSn(BO_3)_2$ ceramics with $5 wt%;CuO/Bi_2O_3;and;3wt%$ Co-coloring agent that sintered at $900^{circ}C$ were $varepsilon_r=9.89,;tan{delta}=0.92times10^{-3},;and;TCC=112ppm/^{circ}C$. Thus obtained LTCC tape was co-fired with Ag paste for compatibility test and revealed no sign of Ag reaction with the ceramics.
Key words: LTCC, Dielectric properties, Co-fire, Compatibility
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