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| Influence of Gd2O3-NiO Co-doping on Thermal Physical Properties of Zirconia-based Ceramic Materials |
| Received:February 13, 2016 Revised:June 15, 2016 |
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| DOI：10.7643/ issn.1672-9242.2016.03.009 |
| KeyWord:Gd2O3 NiO solid phase synthesis infrared transmittance thermal conductivity YSZ |
| Author | Institution |
| SHU Huan-xuan |
1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology University, Kunming , China; 2.Beijing Institute of Aeronautical Materials, Beijing , China |
| MU Ren-de |
Beijing Institute of Aeronautical Materials, Beijing , China |
| LU Feng |
Beijing Institute of Aeronautical Materials, Beijing , China |
| WANG Kai-jun |
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology University, Kunming , China |
| ZHU Dao-fei |
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology University, Kunming , China |
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| Abstract: |
| Objective To study the influence of Gd2O3-NiO co-doping on thermal physical properties of zirconia-based ceramic materials. Methods Gd2O3-NiO co-doped YSZ(contain 3.5%Y2O3, mol fraction)(GN-YSZ)was prepared by solid phase synthesis method .The crystal structure and phase composition of the GN-YSZ were studied by XRD analysis. The microstructure was analyzed by SEM. The thermal diffusivities of ceramic materials were tested by laser-flash method. The infrared transmittance was studied by infrared transmittance instrument. Results The results showed that after Gd2O3-NiO co-doping of YSZ, the content of monoclinic phase(M) was decreased, the thermal conductivity in the temperature range of room temperature to 1300 ℃ was reduced, and the infrared transmittance of ceramics materials in the wavelength range of 2.5 μm~5 μm was also reduced. Conclusion The influencing mechanism of doping oxides on the thermal physical property of YSZ was that co-doping with Gd2O3 and NiO resulted in lattice distortion and content variation of monoclinic phase(M), tetragonal phase(T) and cubic phase(C) in YSZ. The influencing mechanism of the radioactive heat transfer was that doping transition metallic NiO led to an optical absorption at the particular wavelengths. That was why transition metallic elements such as Ni2+ site could effectively reduce the transmittance of GN-YSZ ceramics at short wavelengths, while reduce infrared radioactive heat transfer at high temperature. |
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