Fabrication and properties of La2-xGdxHf2O7 transparent ceramics

Fabrication and properties of La2-xGdxHf2O7 transparent ceramics
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La2-xGdxHf2O7透明陶瓷的制备及性能

DOI:
10.1016/j.jlumin.2014.12.066
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发表时间:
2016
影响因子:
3.6
通讯作者:
Shiwei Wang
Shiwei Wang
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Fang Zhang;Xianpeng Qin;Jianping Ai;Shiwei Wang

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采用简单燃烧法合成的纳米粉末,通过真空烧结制备了La2-xGdxHf2O7(x=0–2.0)透明陶瓷。研究了粉末和最终陶瓷的相组成、陶瓷的在线透射率、微观结构和密度。随着Gd含量的增加,陶瓷保持立方烧绿石结构,晶格参数减小,而密度线性增加。所有陶瓷都是透明的。 800 nm (x=1.2) 处的最高直线透射率为 76.1%。一些 La2-xGdxHf2O7(x=0–2.0) 透明陶瓷具有高密度 (7.91–8.88 g/cm3) 和有效原子序数,是闪烁体基质的有希望的候选者。
La2-xGdxHf2O7(x=0–2.0) transparent ceramics were fabricated through vacuum sintering from nano-powders synthesized by a simple combustion method. The phase composition of the powders and final ceramics, the in-line transmittance, microstructures and density of the ceramics were investigated. With the increasing of Gd content, the ceramics maintained the cubic pyrochlore structure, and the lattice parameters decreased, whilst the densities increased linearly. All the ceramics were transparent. The highest in-line transmittance was 76.1% at 800 nm (x=1.2). With high density (7.91–8.88 g/cm3) and effective atomic number, some of the La2-xGdxHf2O7(x=0–2.0) transparent ceramics are promising candidates for scintillator hosts.
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