Vacuum sintering of novel transparent Tm2O3 ceramics: Effect of silica additive and thermal performance

被引:18
|
作者
Wang, Xinyuan [1 ]
Lu, Bin [1 ,2 ]
Feng, Kai [1 ]
Liu, Yongxing [2 ]
机构
[1] Ningbo Univ, Sch Mat Sci & Chem Engn, Ningbo 315211, Zhejiang, Peoples R China
[2] Key Lab Photoelect Detect Mat & Devices Zhejiang, Ningbo 315211, Zhejiang, Peoples R China
基金
中国国家自然科学基金;
关键词
Thulium oxide; Transparent ceramics; Sintering aid; Thermal conductivity; Silica; UP-CONVERSION; HIGHLY TRANSPARENT; FABRICATION;
D O I
10.1016/j.jeurceramsoc.2020.07.029
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Polycrystalline transparent Tm2O3 ceramics are successfully fabricated by means of chemical precipitation route plus vacuum sintering technique. Hexamethylenetetramine as the precipitant is dripped into thulium sulphate system to directly result in a hydrated basic sulphate precursor with an approximate chemical composition of Tm (OH)(1.7)(SO4)(0.65)center dot 2.1H(2)O, followed by pyrolysis to yield a sphere-like Tm2O3 powder with an average particle size of-165 nm. During high-temperature sintering, the silica additive induces lattice distortion via the formation of interstitial solid solution and helps to achieve a uniform microstructure together with good optical quality. The best Tm2O3 ceramic sample has in-line transmittances of similar to 71 % at 880 nm and similar to 76 % in partial middle infrared spectral region with maximal infrared cut-off at similar to 11 mu m. The thermal diffusion and thermal conductivity of the bulk both decrease as the temperature increases.
引用
收藏
页码:6249 / 6253
页数:5
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