MgO assisted densification of highly transparent YAG ceramics and their microstructural evolution |
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| Authors: | Tianyuan Zhou Le Zhang Shuai Wei Lixi Wang Hao Yang Zhenxiao Fu Hao Chen Farida A. Selim Qitu Zhang |
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| Affiliation: | 1. College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, PR China;2. Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, PR China;3. Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronics Engineering, Jiangsu Normal University, Xuzhou 221116, PR China;4. State Key Laboratory of Advanced Materials and Electronic Components, Guangdong Fenghua Advanced Technology Holding Co., Ltd, Zhaoqing 526020, PR China;5. Center for Photochemical Sciences, Department of Physics and Astronomy, Bowling Green State University, Bowling Green 43403, USA |
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| Abstract: | In current study, various amounts of MgO single dopant was adopted to fabricated high quality transparent YAG ceramics, by utilizing a simple one-step solid state reaction sintering method in vacuum. At a MgO doping amount of only 0.03 wt.%, YAG transparent ceramics with a transmittance of 84.5% at 1064 nm could be obtained, after sintering at 1820 °C for 8 h. The microstructure evolution and optical property of as-fabricated YAG ceramics as a function of MgO doping concentration were systematically investigated. MgO dopant could effectively promote densification of YAG ceramics when the sintering temperature was lower than 1660 °C, and dramatically accelerate its grain growth between 1540 °C and 1660 °C. Further increase the doping amount of MgO would not benefit to the optical quality of YAG ceramics, and the intragranular pores as well as the Mg-riched secondary phase were observed from the MgO heavily doped ceramics. |
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| Keywords: | Transparent YAG ceramic MgO additive Grain growth Densification Optical property |
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