采用化学腐蚀法研究Nd∶YAG晶体位错.研究发现,腐蚀剂、腐蚀温度以及腐蚀时间对位错的显示都有影响.浓磷酸腐蚀剂在220 ℃下腐蚀20 min时,显示的位错最为清晰.蚀坑形状为菱形,经过计算,位错密度大约为10~3 cm~(-2).同一种腐蚀剂在不同的腐蚀时间所形成的位错蚀坑大小和形貌是不同的.同时发现在样品的边缘有位错塞积群.
The dislocation of Nd∶YAG crystal was studied by chemical etching method. The results indicate that the exhibition of the dislocation would be affected by corrosion temperature, corrosion time and corrosive agents. The exhibition of the dislocation was distinctive when the crystal was corroded by the concentrated phosphate acid at 220 ℃ for 20 min,and the pattern of etch pits was rhombus.By calculation, the dislocation density is about 10~3 cm~(-2). It was shown that the etch pit sizes and shapes of dislocation was different when the sample was corroded by the same corrosive under various etching time. At the same time , the dislocation pile-up groups was found on the edge of samples.
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