Stirring speed assisted homogenization of precipitation reaction for enhanced optical performance of Y2O3 transparent ceramics |
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| Authors: | Le Zhang Zhigang Jiang Qing Yao Zhongying Wang Yikun Zhang Shuai Wei Tianyuan Zhou Yue Ben Rong Sun Hao Chen |
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| Affiliation: | 1. Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, PR China;2. School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, PR China;3. Guangdong Provincial Key Laboratory of Materials for High Density Electronic Packaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, PR China |
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| Abstract: | Y2O3 transparent ceramics were fabricated from precipitated powders prepared at different stirring speeds during the precipitation process. The influence of the stirring speed on the phase component of precursors, morphology of Y2O3 powders and properties of fabricated ceramics were systematically investigated. Crystalline phase precursors of (NH4)aY(OH)b(CO3)c·H2O were prepared from 110 rpm, 220 rpm and 550 rpm respectively. But amorphous precursors of Y(CO3)(OH)·nH2O (n = 1–1.5) were observed when stirring speeds were 330 rpm and 440 rpm. Y2O3 powders prepared from 440 rpm exhibited the lowest agglomeration and the smallest grain size, and the ceramics with the optimal transmittance was accordingly obtained. The results of computational fluid dynamics software CFX showed that a more homogeneous flow field distribution without local circulations could be produced at 440 rpm, which would be benefit for the optical quality of transparent ceramics. The study would provide a considerable reference for the controllable fabrication of well-dispersibility Y2O3 powders and Y2O3 transparent ceramics. |
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| Keywords: | Stirring speed Precipitation ANSYS CFX Homogenization |
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