Crystallization Kinetics of $PbO-TiO_2-SiO_2-B_2O_3$ Glasses by DSC

DSC에 의한 $PbO-TiO_2-SiO_2-B_2O_3$계 유리의 결정화 속도

  • 손명모 (대구공업전문대학 요업과) ;
  • 이승호 (경북지방 공업기술원) ;
  • 이헌수 (대구공업전문대학 요업과) ;
  • 박희찬 (부산대학교 무기재료공학과)
  • Published : 1995.12.01

Abstract

The glass-ceramics for ferro-electric were made from compositions of 70PbO.16TiO2.8SiO2.4B2O3.2AlPO4 (wt%) and 67.5PbO.20TiO2.8.5SiO2.2B2O3.2AlPO4 (wt%). The crystallization kinetics for PbTiO3 crystalline phase formation from glass was studied using non-isothermal DSC techniques. The values of activation energy, ΔE using variables of heating rate and temperature were calculated at various reaction fractions obtained from peak area over DSC. The results indicated that activation energy was lowest at 60% reaction fractions and the activation energy of glass containing 20.0 wt% TiO2 is higher than that of glass containing 16.0 wt% TiO2. The crystallization mechanism was three dimensional growth (n=4).

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