Fabrication and optical properties of transparent LaErZr2O7 ceramic with high excess contents of La and Er |
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| Authors: | Wenwen Zhao Kuibao Zhang Weiwei Li Baozhu Luo Haibin Zhang Kai Xu |
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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. Institutes of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621900, China;3. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, China |
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| Abstract: | In this study, transparent LaErZr2O7 ceramic with high excess La and Er contents (nominally La1.28Er1.28Zr2O7.84) was successfully prepared by vacuum sintering at 1850?°C for 6?h using nanosized powder. The XRD, SEM, EDX and TEM results reveal that the single pyrochlore phase in the powder sample transforms to the coexistence of La-rich pyrochlore phase and Er-rich defect fluorite phase after high temperature sintering. The high excess amounts of La and Er favor the formation of pyrochlore structure. Despite the coexistence of two phases, the sample with 1?mm thickness shows excellent in-line transmittance in the visible to mid-infrared region (as high as 81% at 1100?nm). The upconversion and infrared emission under 980?nm exciting were measured and discussed as well. |
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| Keywords: | Vacuum sintering Pyrochlore Transparent ceramic TEM Optical properties |
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