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http://dx.doi.org/10.4191/KCERS.2004.41.12.915

Low-Temperature Sintering and Phase Change of BaTi4O9-Based Ceramics Middle-k LTCC Dielectric Compositions by Glass Addition  

Choi, Young-Jin (Multifunctional Ceramics Research Center, Korea Institute of Science and Technology, Department of Materials Science and Engineering, Korea University)
Park, Jae-Hwan (Multifunctional Ceramics Research Center, Korea Institute of Science and Technology)
Nahm, Sahn (Department of Materials Science and Engineering, Korea University)
Park, Jae-Gwan (Multifunctional Ceramics Research Center, Korea Institute of Science and Technology)
Publication Information
Journal of the Korean Ceramic Society / v.41, no.12, 2004 , pp. 915-920 More about this Journal
Abstract
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.
Keywords
LTCC; Glass frit;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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