Fabrication of Gd2O3-MgO nanocomposite optical ceramics with varied crystallographic modifications of Gd2O3 constituent
Fabrication of Gd2O3-MgO nanocomposite optical ceramics with varied crystallographic modifications of Gd2O3 constituent
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具有不同 Gd2O3 成分晶体学修饰的 Gd2O3-MgO 纳米复合光学陶瓷的制备
DOI：
10.1111/jace.15884
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发表时间：
2018
影响因子：
3.9
通讯作者：
Sun Xudong
中科院分区：
文献类型：
--
作者：
Wu Nan;Li Xiaodong;Li Ji-Guang;Zhu Qi;Sun Xudong
采用溶胶-凝胶法制备立方相Gd 2 O3和MgO纳米粉体，采用热压法制备了Gd 2 O3-MgO纳米复合光学陶瓷。在600°C下煅烧的前体粉末具有12 nm的平均粒度。研究了热压温度对合金的相组成、显微组织、中红外透过率和显微硬度的影响。在1250 ~ 1350°C范围内，随着烧结温度的升高，Gd 2 O3相的晶型发生变化。在1350°C下烧结的复合材料保留了单斜-Gd 2 O3相，样品的平均晶粒尺寸为90 nm，在3 - 6 μm波长范围内具有优异的透射率（80.4%-84.8%），硬度值提高到14.1 GPa。
The fabrication of Gd2O3‐MgO nanocomposite optical ceramics via hot‐pressing using sol‐gel derived cubic‐Gd2O3and 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 Gd2O3phase varied with the increase in sintering temperature from 1250 to 1350°C. The monoclinic‐Gd2O3phase 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.