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J. Korean Ceram. Soc. > Volume 46(2); 2009 > Article
Journal of the Korean Ceramic Society 2009;46(2): 200.
doi: https://doi.org/10.4191/kcers.2009.46.2.200
Milling 조건에 따른 BaTiO3의 저온 소결성 및 전기적 특성 변화
홍민희, 손성범, 김영태, 허강헌1
삼성전기 LCR 사업부 재료개발그룹
1삼성전기 LCR 사업부 LCR개발팀
Effect of Milling Condition on Low-temperature Sinterability and Electrical Properties of BaTiO3 Ceramics
Min-Hee Hong, Sung-Bum Sohn, Young-Tae Kim, Kang-Heon Hur1
Material Development Group, LCR Division, Samsung Electro-Mechanics
1LCR Development Team, LCR Division, Samsung Electro-Mechanics
ABSTRACT
It is necessary to minimize the mismatch of sintering shrinkage between dielectric ceramic and Ni inner electrode layers for the purpose of developing the ultra high-capacity multi layered ceramic condenser(MLCC). Thus, low temperature sintering of dielectric $BaTiO_3$ ceramic should be precedently investigated. In this work, the influence of the milling condition on sintering behavior and electrical properties of $BaTiO_3$ ceramics was investigated in the $BaTiO_3$(BT)-Mg-Dy-Mn-Ba system with borosilicate glass as a sintering agent. As milling time increased, specific surface area(SSA) of the powder increased linearly, while both sinterability and dielectric property were found to be drastically decreased with an increasing SSA. It was also revealed that the sinterability of the excessively milled $BaTiO_3$ ceramics could be recovered by increasing Ba content, rather than increasing glass addition. These results suggest that the sintering behavior of $BaTiO_3$ ceramics under the high SSA was more strongly dependent on the transient liquid phase caused by Ba addition, than the liquid phase from additional glass.
Key words: MLCC, $BaTiO_3$, Low temperature sintering, Milling
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