Solid-state reactive sintering of La2-xGdxZr2O7 transparent ceramics and their optical properties |
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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;3. Institutes of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621900, China;1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;2. Center of Materials Research and Analysis, Wuhan University of Technology, Wuhan 430070, China;1. College of Optics and Electronic Science and Technology, China Jiliang University, Hangzhou, 310018, China;2. Key Laboratory of Materials for High Power Lasers, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai, 201800, China;1. School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China;2. Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province, Ningbo, Zhejiang, 315211, China;1. University of Belgrade – Vin?a Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Serbia;2. Dipartimento di Biotecnologie, Università di Verona and INSTM, UdR Verona, Strada Le Grazie 15, I-37134 Verona, Italy;3. Institute of Physics, University of Tartu, Riia 142, Tartu 51014, Estonia;4. LSME&CIME, École Polytechnique Fédérale de Lausanne, Station 12, CH-1015 Lausanne, Switzerland |
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| Abstract: | Transparent polycrystalline La2-xGdxZr2O7 (x = 0.4–2.0) ceramics were fabricated by solid-state reactive sintering using commercially available La2O3, Gd2O3 and ZrO2 nanopowders as the raw materials. The phase composition, microstructure evolution, densification and optical transmittance of the resulting ceramics were investigated. XRD and Raman results reveal that both the powders and ceramics are in single-phase pyrochlore structure. With the promotion of Gd content, the disorder degree of pyrochlore structure increases gradually while the cell parameters decrease. The x = 1.0, 1.2 and 1.6 samples exhibit high optical transmittance in the 450 nm-6.0 μm range, and the La0.4Gd1.6Zr2O7 sample shows the highest transmittance of 83.84%. The transparent La2-xGdxZr2O7 ceramics with high optical quality are available as scintillator matrice and high temperature window material. |
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| Keywords: | Solid-state reaction Pyrochlore Morphology Transmittance |
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