Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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The properties of glass ceramic of LAS system with Y2O3 and Fe2O3

Y2O3와 Fe2O3가 포함된 LAS 계 결정화 유리 특성

  • Lee, Ji-Sun (Optic & Electric Components Materials Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Lim, Tae-Young (Optic & Electric Components Materials Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Hwang, Jonghee (Optic & Electric Components Materials Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Lee, Youngjin (Optic & Electric Components Materials Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Jeon, Dae-Woo (Optic & Electric Components Materials Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Sun-Woog (Optic & Electric Components Materials Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Ra, Yong-Ho (Optic & Electric Components Materials Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Jin-Ho (Optic & Electric Components Materials Center, Korea Institute of Ceramic Engineering and Technology)
  • 이지선 (한국세라믹기술원 광전자부품소재센터) ;
  • 임태영 (한국세라믹기술원 광전자부품소재센터) ;
  • 황종희 (한국세라믹기술원 광전자부품소재센터) ;
  • 이영진 (한국세라믹기술원 광전자부품소재센터) ;
  • 전대우 (한국세라믹기술원 광전자부품소재센터) ;
  • 김선욱 (한국세라믹기술원 광전자부품소재센터) ;
  • 라용호 (한국세라믹기술원 광전자부품소재센터) ;
  • 김진호 (한국세라믹기술원 광전자부품소재센터)
  • Received : 2019.07.31
  • Accepted : 2019.08.13
  • Published : 2019.08.31
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Abstract

The glass-ceramic of $Li_2O-Al_2O_3-SiO_2$ system was fabricated by using yttrium oxide and iron oxide that it can reduce the melting temperature and affect the homogenization. Zirconium sulfate was used as a nucleation agent. Calcium phosphate was used to improve the flow the glass so as reduce the viscosity of the glass. The glass-ceramics met a thermal shock test of more than $750^{\circ}C$ and the temperature at which the coefficient of thermal expansion rapidly increased at over $800^{\circ}C$ was shifted by about the above $30^{\circ}C$. Therefore, it is concluded that the glass-ceramic of $Li_2O-Al_2O_3-SiO_2$ system with yttrium oxide and iron oxide was founded to have good melting conditions and excellent thermal expansion resistance at high temperature such as special field for kitchen utensils.

용융 온도를 낮추고 균질화에 영향을 줄 수 있는 yttrium oxide(산화 이트륨)과 iron oxide(산화철)를 사용하여 $LI_2O-Al_2O_3-SiO_2$ 계 결정화 유리를 제조하였다. 조핵제는 Zirconium sulfate(황산지르코늄)을 사용했고, 유리 점도를 낮추기 위해 calcium phosphate(인산칼슘)을 사용해 유리 유동성을 원활하게 하였다. 결정화 유리는 열충격 $750^{\circ}C$ 이상을 만족했고, $800^{\circ}C$ 이상에서 열팽창계수가 급격하게 상승하는 온도를 약 $30^{\circ}C$ 이상 시프트 하였다. 따라서 yttrium oxide와 iron oxide 포함하는 LAS 계 유리는 고온에서 양호한 용융 상태와 우수한 열팽창 저항성을 확인하였고 특수 주방용 재료 분야에 충분히 활용이 가능하리라 판단되었다.

Keywords

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