Transparent La2−xGdxZr2O7 ceramics obtained by combustion method and vacuum sintering
Transparent La2−xGdxZr2O7 ceramics obtained by combustion method and vacuum sintering
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DOI：
10.1016/j.jallcom.2013.09.187
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发表时间：
2014-02
影响因子：
6.2
通讯作者：
Zhengjuan Wang;Guohong Zhou;X. Qin;Yan Yang;Guangju Zhang;Y. Menke;Shiwei Wang
中科院分区：
文献类型：
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作者：
Zhengjuan Wang;Guohong Zhou;X. Qin;Yan Yang;Guangju Zhang;Y. Menke;Shiwei Wang
采用简单燃烧法合成了La 2 − xGdxZr 2 O 7（x= 0 ~ 2.0）纳米粉体，经真空烧结制备了透明陶瓷。研究了所得陶瓷的物相组成、形貌和在线透过率随Gd 3+含量的变化。随着Gd 3+含量的增加，样品保持烧绿石结构，但粉末和陶瓷的X射线衍射峰随着晶格常数变小而向高角度移动。所有的陶瓷都是透明的，具有高的在线透射率和高的折射率（2.08@632.8nm，x= 0.4-1.6）。这些结果表明，La 2 − xGdxZr 2 O 7陶瓷可用作光学透镜。此外，随着Gd 3+含量的增加，陶瓷的有效原子序数和密度增加，因此使它们成为闪烁体的有希望的宿主候选者。
Transparent La2−xGdxZr2O7(x= 0–2.0) ceramics were prepared via vacuum sintering from nanometric powders synthesized by a simple combustion method. The changes of phase composition, morphology and in-line transmittance of the resulting ceramics with Gd3+content’s variation were investigated. With the increase of Gd3+content, the samples keep the pyrochlore structure, but the X-ray diffraction peaks of the powders and ceramics shift to higher angle as the lattice parameters become smaller. All the ceramics are transparent with high in-line transmittance and high refractive index (2.08 @ 632.8 nm,x= 0.4–1.6). These results indicate that La2−xGdxZr2O7ceramics might be used as optical lens. Moreover, with the increase of Gd3+content, the effective atomic number and density of the ceramics increase, therefore making them promising host candidates for scintillators.