Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of Al2O3 Filler Addition on Sintering Behavior and Physical Characteristics of BaO-B2O3-ZnO Glass Ceramic System

BaO-B2O3-ZnO 결정화 유리계에서 Al2O3 Filler의 첨가에 따른 소결거동 및 물성변화

  • Kim, Byung-Sook (Department of Inorganic Materials Engineering, Kyungpook National University) ;
  • Kim, Young-Nam (LG Micron Ltd.) ;
  • Lim, Eun-Sub (Department of Inorganic Materials Engineering, Kyungpook National University) ;
  • Lee, Joon-Hyung (Department of Inorganic Materials Engineering, Kyungpook National University) ;
  • Kim, Jeong-Joo (Department of Inorganic Materials Engineering, Kyungpook National University)
  • 김빙숙 (경북대학교 무기재료공학과) ;
  • 김영남 (LG마이크론(주)) ;
  • 임은섭 (경북대학교 무기재료공학과) ;
  • 이준형 (경북대학교 무기재료공학과) ;
  • 김정주 (경북대학교 무기재료공학과)
  • Published : 2005.02.01
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Abstract

Suitable compositions which are sinterable at low temperature in the $BaO-B_{2}O_{3}-ZnO$ glass system were investigated as a function of the ratio between BaO and ZnO. The effect of $Al_{2}O_3$ filler on densification and physical characteristics of the glass was also examined. When the amount of $Al_{2}O_3$ filler increased, the densification rate and the values of dielectric constant, thermal expansion coefficient and hardness in the glass-filler composites decreased gradually. The decreasing rate of the physical properties accelerated when fine $Al_{2}O_3$ filler was used. However, the fracture toughness of the composite rather increased due to the existence of filler particles and pores which effectively suppressed crack propagation with addition of fine $Al_{2}O_3$ filler.

본 연구는 $BaO-B_{2}O_3-ZnO$계에서 저온소성이 가능한 조성을 탐색하고, 여기에 $Al_{2}O_3$를 filler로 첨가하여 복합체를 제조할 경우의 소결거동과 물성에 미치는 영향을 조사하였다. 이때 첨가하는 알루미나 분체는 입자크기가 서로 다른 두 종류를 이용함으로서 알루미나 입자 크기의 효과도 동시에 조사하였다. 알루미나 첨가량이 증가하는 경우 복합체의 치밀화정도, 유전상수, 열팽창계수, 그리고 경도 값이 감소하였다. 또한 첨가되는 알루미나 입자의 크기가 미세할 경우 그 감소율은 증가되었다. 한편 파괴인성값은 알루비나 첨가량이 많을수록, 알루미나 입자 크기가 작을수록 오히려 증가하였는데 이는 기공과 filler의 crack전파 억제 효과에 의한 것으로 해석하였다.

Keywords

References

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