The fabrication of Gd₂O₃‐MgO nanocomposite optical ceramics via hot‐pressing using sol‐gel derived cubic‐Gd₂O₃ and MgO nanopowders was investigated. The precursor powder calcined at 600°C had an average particle size of 12 nm. The effects of hot‐pressing temperature on constituent phases, microstructure, mid‐infrared transmittance, and microhardness were studied. The crystallographic modifications of Gd₂O₃ phase varied with the increase in sintering temperature from 1250 to 1350°C. The monoclinic‐Gd₂O₃ phase was retained for the composite sintered at 1350°C and the sample had an average grain size of 90 nm, excellent transmission (80.4%‐84.8%) over 3‐6 μm wavelength range, and enhanced hardness value of 14.1 GPa.

中文翻译：

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具有Gd2O3成分的不同晶体学修饰的Gd2O3-MgO纳米复合光学陶瓷的制备

研究了使用溶胶-凝胶法制得的立方-Gd ₂ O ₃和MgO纳米粉通过热压法制备Gd ₂ O ₃ -MgO纳米复合光学陶瓷。在600℃下煅烧的前体粉末的平均粒径为12nm。研究了热压温度对组成相，显微组织，中红外透射率和显微硬度的影响。Gd ₂ O ₃相的晶体学变化随烧结温度从1250到1350°C的增加而变化。单斜-Gd ₂ O ₃ 在1350°C烧结的复合材料中保留了第一相，样品的平均晶粒尺寸为90 nm，在3-6μm波长范围内具有出色的透射率（80.4％-84.8％），并且硬度值提高了14.1 GPa。