Crystal chemistry and growth of$La_3Ga_5SiO_{14}$ for the applications of filter and resonator

필터와 레죠네이터 응용을 위한 $La_3Ga_5SiO_{14}$ 의 결정화학 및 성장

  • Jung, Il-Hyoung (Department of Ceramic Engineering, Hanyang University) ;
  • Joo, Kyung (Ceramic Processing Research Center(CPRC), Hanyang University) ;
  • Shim, Kwang-Bo (Ceramic Processing Research Center(CPRC), Hanyang University) ;
  • Auh, Keun-Ho (Ceramic Processing Research Center(CPRC), Hanyang University)
  • 정일형 (한양대학교 세라믹공학과) ;
  • 주경 (한양대학교 세라믹공정연구센터) ;
  • 심광보 (한양대학교 세라믹공정연구센터) ;
  • 오근호 (한양대학교 세라믹공정연구센터)
  • Published : 1999.02.01

Abstract

Langasite($La_3Ga_5SiO_14$) is a new piezoelectric material which is similar to quartz, LN($LiNbO_3$) and LT($LiTaO_3$) in its acoustic behavior. In this study, pure Langasite and Lagnasite family groups were synthesized by the solid state reactions in air. The diffusion species for synthesis were investigated and the sintered body was studied on dielectric property to comparison of characteristics. Also, Langasite single crystals were grown by self-designed Czochralski system and characterized.

Langasite($La_3Ga_5SiO_14$)는 acoustic 특성에서 quartz, $LiTaO_3$$LiNbO_3$에 비교되는 새로운 압전재료이다. 본 연구에서는 새로운 Langasite 계열의 물질을 공기 중에서 고상반응법에 의해 합성하였고, 합성공정에서의 주요 확산종 을 조사하였다. 이때 합성된 물질의 소결체를 제조하여 각각의 유전적 성질을 비교평가하였다. 또한, Langasite 단결정 을 자체제작한 Czochralski 시스댐을 사용하여 성장시키는데 성공하였고, 성장된 결정의 물성을 평가하였다

Keywords

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