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本文用反射高能电子衍射(RHEED)以及金相显微镜和扫描电子显微镜等分别对碲镉汞晶体表面的沾污相和偏析物进行了观察和分析。得出表面沾污相是氧化镁,来源于机械抛光过程中MgO粉的残留。对碲镉汞中偏析物和周围基体的对比分析表明,该偏析物是碲和碲镉汞的复杂混和物。其产生原因在于熔融物的结构过冷。
In this paper, the contaminated phases and segregants on the surface of HgCdTe crystals were observed and analyzed by reflection high energy electron diffraction (RHEED), metallographic microscope and scanning electron microscope. Obtained surface contamination phase is magnesium oxide, MgO powder from the mechanical polishing process residues. A comparative analysis of the segregates in mercury cadmium telluride and the surrounding matrix indicates that the segregate is a complex mixture of tellurium and cadmium telluride. The reason for this is that the structure of the melt is too cold.