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J. Korean Ceram. Soc. > Volume 50(1); 2013 > Article
Journal of the Korean Ceramic Society 2013;50(1): 57.
doi: https://doi.org/10.4191/kcers.2013.50.1.57
Sheath Heater 모듈 실링용 B2O3-ZnO-Bi2O3계 유리소재 및 첨가제에 따른 물성 변화
최진삼, 신동우, 배원태
경상대학교 세라믹공학전공
Effect of an Additive on the Physical and Electrical Properties of the B2O3-ZnO-Bi2O3 Glass System for a Sheath Heater Module
Jinsam Choi, Dong Woo Shin, Won Tae Bae
Department of Ceramic Engineering, Gyeongsang National University
We investigated the thermal and electrical properties of the $B_2O_3-ZnO-Bi_2O_3$ glass system as a sealing material in sheath heater modules. A composition with over 90 wt% $Bi_2O_3$ in the $B_2O_3-ZnO-Bi_2O_3$ system was glassified by controlling the cooling rate. The glass transition temperature and thermal expansion coefficient in bismate glass could be controlled by the minor ingredients of ZnO, $SiO_2$, $BaO_2$, and $K_2O$. The $B_2O_3-ZnO-Bi_2O_3$ glass system bonded well to metal, and bismate glass insulating properties were comparable to those of bismate glass $B_2O_3-ZnO-PbO$ glass system in a sheath heater module.
Key words: Pb-free glass, $B_2O_3-ZnO-Bi_2O_3$ system, Sheath heater, Hermetic sealing, Insulation
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