The Study of Sintering Characteristics in LAS(Li2O.Al2O3.SiO2) System

LAS($Li_2O.Al_2O_3.SiO_2$)계 소지의 소결특성에 관한 연구

  • Lee, Eung-Sang (Dept. of Inorganic Mat. Eng., Hanyang Univ) ;
  • Park, Hyun (Dept. of Inorganic Mat. Eng., Hanyang Univ) ;
  • Kim, Dong-Hwan (Dept. of Inorganic Mat. Eng., Hanyang Univ)
  • 이응상 (한양대학교 무기재료공학과) ;
  • 박현 (한양대학교 무기재료공학과) ;
  • 김동환 (한양대학교 무기재료공학과)
  • Published : 1992.02.01


It has been reported that natural petalite showed a low negative thermal coefficient and wide coefficient and wide coexisting region with liquid phase in Li2O-Al2O3-SiO2 system. Therefore, we investigated variation of microstructure and thermal and mechanical properties when the amount of SiO2 content in petalite compound and MgO addition to it compound were changed. As SiO2 content exceeded 80 wt%, crystal phases of $\beta$-cristobalite and $\beta$-spondumene solid solution were formed. Generally, the densification and bending strength were increased by the addition of MgO, but the positive thermal coefficient was found in the case of MgO 10 wt% addition because of second phase and glassy phase.



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