Vacuum sintering of highly transparent La1+xYb1+yZr2O7 ceramics with excess La and Yb contents |
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| Authors: | Ting Deng Kuibao Zhang Kui Liu Jianjun Zeng Daimeng Chen Haiyan Guo |
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| Affiliation: | 1. State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China;2. Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang 621010, China |
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| Abstract: | In this study, a series of transparent ceramics with chemical composition of La1+xYb1+yZr2O7 (x, y = 0.1?0.5) were successfully prepared by vacuum sintering using combustion synthesized powders. The effects of excess contents on the phase composition, microstructure and in-line transmittance have been studied. The detailed results indicate that the in-line transmittance increases at first and then decreases as La content be elevated. It was also determined that the highest in-line transmittance of La1+xYb1+yZr2O7 (x, y = 0.1?0.5) ceramics is 84.1 % at 1100 nm when the excess amount of co-doped La-Yb is 30 %. Compared with stoichiometric LaYbZr2O7 ceramic, the nonstoichiometric La1+xYb1+yZr2O7 (x, y = 0.1?0.5) ceramics exhibit much higher transparency. In addition, the high excess amount of La, Yb and co-doped La-Yb also shows effects on the phase composition and crystal structure. |
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| Keywords: | Keyword Transparent ceramics Vacuum sintering Pyrochlore Transmittance |
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