CAJ | 학술논문

采用Bridgman法生长了二氧化碲(TeO2)晶体,运用光学显微镜、电子衍射光谱、化学腐蚀等方法分析了该方法生长TeO2晶体内部的缺陷.初步讨论了散射点、微裂纹、气泡和黑点、条纹以及腐蚀坑等微缺陷的形成机理.结果表明:晶体内部的散射点来自于原料中杂质,条纹主要是由于晶体内应力引起,晶体内的气泡和黑点和晶体生长的温度密切相关,并就如何减少这些微缺陷进行了初步探讨.
채용Bridgman법생장료이양화제(TeO2)정체,운용광학현미경、전자연사광보、화학부식등방법분석료해방법생장TeO2정체내부적결함.초보토론료산사점、미렬문、기포화흑점、조문이급부식갱등미결함적형성궤리.결과표명:정체내부적산사점래자우원료중잡질,조문주요시유우정체내응력인기,정체내적기포화흑점화정체생장적온도밀절상관,병취여하감소저사미결함진행료초보탐토.
TeO2 crystals were grown by Bridgman method. Optical microscopy, electronic diffraction spectrum, and chemical etching were used to investigate the crystal defects. The formation mechanism of different defects such as scatter-point, cleavage, bubble and black inclusion, striation and etch pit was discussed. The results indicated that scatter-points were resulted from impurities of starting materials. Cleavages are mainly caused by crystal stress. Formations of black inclusions and bubbles were mainly related to the growth temperatures. Furthermore, some suggestions to decrease the defects were put forward.