Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of an Additive on the Physical and Electrical Properties of the B2O3-ZnO-Bi2O3 Glass System for a Sheath Heater Module

Sheath Heater 모듈 실링용 B2O3-ZnO-Bi2O3계 유리소재 및 첨가제에 따른 물성 변화

  • Choi, Jinsam (Department of Ceramic Engineering, Gyeongsang National University) ;
  • Shin, Dong Woo (Department of Ceramic Engineering, Gyeongsang National University) ;
  • Bae, Won Tae (Department of Ceramic Engineering, Gyeongsang National University)
  • 최진삼 (경상대학교 세라믹공학전공) ;
  • 신동우 (경상대학교 세라믹공학전공) ;
  • 배원태 (경상대학교 세라믹공학전공)
  • Received : 2012.09.14
  • Accepted : 2012.12.03
  • Published : 2013.01.31
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Abstract

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.

Keywords

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