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Optimization Research on Preparation of CeO2 Using Microwave Heating Method Based on Regression Orthogonal Design

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Abstract

Microwave heating has characteristics of easy control and high efficiency. The optimization of process parameters and reactor structure is significant to improve the purity and microstructure of products, respectively. The purity of cerium oxide and mixing degree of homogeneity were taken as research indexes, the regression models for process parameters (microwave power, gas inlet velocity and material inlet velocity) and reactor structure (material inlet diameter, Venturi tube diameter and length of drainage tube) were built, and their linear regression equations were obtained. Results showed that increasing power and decreasing gas velocity both had positive effects on the increase of purity. The highest purity, 99.4%, was obtained when the power was 4 kW and the gas velocity was 3.5 m/s. Higher mixing degree of homogeneity contributed to better morphology, showing good dispersity and seldom agglomeration. The highest mixing degree of homogeneity was obtained when material inlet diameter and Venturi tube diameter were 7 mm and 11 mm, respectively.

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Authors and Affiliations

  1. School of Control and Engineering, Northeastern University, Qinhuangdao, 066004, Hebei, China

    Chao Lv, Hongxin Yin, Yanlong Liu & Xuxin Chen

  2. School of Metallurgical and Ecological Engineering, University of Science and Technology Bei**g, Bei**g, 100083, China

    Hongliang Zhao

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  1. Chao Lv
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  2. Hongxin Yin
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  3. Yanlong Liu
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  4. Xuxin Chen
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  5. Hongliang Zhao
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Lv, C., Yin, H., Liu, Y. et al. Optimization Research on Preparation of CeO2 Using Microwave Heating Method Based on Regression Orthogonal Design. JOM 75, 2421–2429 (2023). https://doi.org/10.1007/s11837-022-05654-w

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  • DOI: https://doi.org/10.1007/s11837-022-05654-w

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