国内在用高频引上法生长YAG、YAP晶体的工作中,通常使用ZrO_2作为制作保温罩的材料。但ZrO_2保温罩很容易开裂,而且ZrO_2颗粒和粉末极易落入坩埚内,严重影响晶体的质量。我们采用Y_2O_3(纯度99.9％,熔点2450℃)代替ZrO_2做保温罩,并改进了保温罩的抗裂性能,减少了外界杂 Domestic use of high-frequency lead method of growth YAG, YAP crystal work, the usual use of ZrO2 as the material making insulation cover. But the ZrO 2 insulation cover is easy to crack, and ZrO 2 particles and powder easily fall into the crucible, seriously affecting the quality of the crystal. We use Y_2O_3 (purity 99.9%, melting point 2450 ℃) instead of ZrO_2 do insulation cover, and improve the thermal insulation cover crack resistance, reducing the outside miscellaneous