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J. Korean Ceram. Soc. > Volume 44(2); 2007 > Article
Journal of the Korean Ceramic Society 2007;44(2): 110.
doi: https://doi.org/10.4191/kcers.2007.44.2.110
BaO-B2O3-SiO2-K2O-xTiO2 Glass의 첨가에 의한BaNd2Ti5O14-Glass 복합체의 마이크로파 유전특성
김동은, 이성민, 김형태, 김형순1
요업(세라믹)기술원 기능소재팀
1인하대학교 세라믹공학부
Microwave Dielectric Properties of BaNd2Ti5O14−BaO−B2O3-K2O-SiO2-xTiO2 Glass Composites
Dong-Eun Kim, Sung-Min Lee, Hyung-Tae Kim, Hyung-Sun Kim1
Korea Institute of Ceramic Engineering and Technology
1School of Materials Engineering, Inha University
The effects of $TiO_2$ in the glasses on the shrinkage and dielectric properties of BNT-glass composites have been investigated. Without $TiO_2$ addition, BNT-glass composite showed two humps in the shrinkage curve, which are related with crystallization of $BaTi(BO_3)_2;and;Bi_4Ti_3O_{12}$. However, the increase of $TiO_2$ addition resulted in the decrease of 2nd hump in the shrinkage. The increased dielectric constant with $TiO_2$ addition might be due to the reduced crystallization of $Bi_4Ti_3O_{12}$. A dielectric constant of 52, a quality factor of 5088 GHz, and a temperature coefficient of resonant frequency of $-0.16ppm/^{circ}C$ were obtained for a specimen containing $TiO_2$-added glasses, without sacrificing the benefits of high ${varepsilon}_r$ and low TCF of BNT ceramics.
Key words: LTCC, Microwave, Dielectric properties, Glass, $TiO_2$
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