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用温度梯度法 (TGT)生长出了高质量的a面 (11 2 0 )白宝石单晶。通过化学腐蚀和光学显微镜研究了晶体内部的位错分布及其密度的大小 ,同时应用高分辨X射线四圆衍射法测定了晶体内部的完整性
High-quality a-face (1120) white crystals were grown by temperature gradient method (TGT). The distribution of dislocations inside the crystal and its density were studied by chemical etching and optical microscopy. At the same time, the internal integrity of the crystal was measured by high resolution X-ray four-circle diffraction