| Glass 첨가에 의한 BaTi4O9계 중유전율 LTCC 유전체의 저온소결 및 상변화 거동 |
| 최영진, 박재환1, 남산2, 박재관1 |
한국과학기술연구원 복합기능세라믹스연구센터, 고려대학교 재료공학과
1한국과학기술연구원 복합기능세라믹스연구센터
2고려대학교 재료공학과 |
| Low-Temperature Sintering and Phase Change of BaTi4O9-Based Ceramics Middle-k LTCC Dielectric Compositions by Glass Addition |
| Young-Jin Choi, Jae-Hwan Park1, Sahn Nahm2, Jae-Gwan Park1 |
Multifunctional Ceramics Research Center, Korea Institute of Science and Technology, Department of Materials Science and Engineering, Korea University
1Multifunctional Ceramics Research Center, Korea Institute of Science and Technology
2Department of Materials Science and Engineering, Korea University |
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| ABSTRACT |
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The main phase of $BaTi_{4}O_9$-based ceramics was transformed to $BaTi_{5}O_{11}$ caused by the sintering with borosilicate glass, which was analyzed by using XRD and TEM. We considered that the phase change from $BaTi_{4}O_9$-based ceramics to the Ti-rich $BaTi_{5}O_{11}$ phase resulted from borosilicate glass selective absorbing of Ba ions from the $BaTi_{4}O_9$. In these results, we found a dependence on the amounts of the glass frits and the annealing temperature, and the phase change is also dependent of the main phases of $Ba_{4}Ti_{13}O_{30},;and;Ba_{2}Ti_{9}O_{20}$, which are involved in the $BaO-TiO_2-based$ Ti-rich region. In the case of sintering of middle- and high- permittivity material with additional glass frits for middle- and high- dielectric coefficients LTCC composition, control of weight fraction of the glass frits accompanying low-temperature sintering property with appropriate phase change is required. |
| Key words:
LTCC, Glass frit |
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