Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Crystal Growth and Phase Transition of Piezoelectric $KAlSiO_4$

압전성 $KAlSiO_4$ 단결정 육성 및 상변화

  • 오광석 (서울대학교 무기재료공학과) ;
  • 박봉모 (서울대학교 무기재료공학과) ;
  • 정수진 (서울대학교 무기재료공학) ;
  • 이태근 (서울산업대학교 재료공학과) ;
  • 박병규 (서울산업대학교 재료공학과) ;
  • 김호성 (전남대학교 무기재료공학과)
  • Published : 1996.03.01
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Abstract

Kalsilite (KAlSiO4) system undergoes a displacive phase transition from hexagonal phase with p63 space group to the phase with P63mc at 886$^{\circ}C$. The flux composition having kalsilite :K2O:B2O3=1:2:2 has enabled the growth of hexagonal kalsilite with the size of 0.5~1 mm at a slow cooling rate (0.3$^{\circ}C$/hr). On decreasing the cooling rate the size has increased and pyramidal (1011) faces are newly developed with the shape of (0001) and (1010) faces. Upon stirring (1011) faces are degraded. The space group of O1 and O2 are P21221 and C2221 respectively. Their orthorombic modification O1 and O2 are synthesized at relatively low and high temperature respectively.

Keywords

References

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