Abstract
Chemical vapor deposition (CVD) zinc selenide crystal samples were subjected to hot isostatic pressing (HIP) in argon. It was characterized by X-ray diffraction (XRD), metallographic analysis and spectral analysis. The influence of HIP on macrostructure and microstructure was studied. The results show that ZnSe recrystallization occurs during HIP, and the grain size increases with the increase of the temperature. HIP can eliminate the impurity in the material and the uneven grain size defect caused by the change of deposition environment, make the elements evenly distributed, and thus improve the transmittance significantly. After HIP, the average bending strength and hardness of ZnSe decreased by 29.8% and 23% respectively. HIP can also improve the optical uniformity of ZnSe and reduce the absorption coefficient, especially the absorption in short wave range.
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