University of Oulu

Ju Zhou, Wei Cao, Yanqiong Zhang, Mamdouh Omran, Guo Chen, Lei Gao, Fan Zhang, Ju Tang, Effect of microwave drying technology on drying kinetics of Al2O3–ZrO2 composite ceramic powder, Journal of Materials Research and Technology, Volume 24, 2023, Pages 6762-6778, ISSN 2238-7854,

Effect of microwave drying technology on drying kinetics of Al₂O₃–ZrO₂ composite ceramic powder

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Author: Zhou, Ju1; Cao, Wei1; Zhang, Yanqiong1;
Organizations: 1Kunming Key Laboratory of Energy Materials Chemistry, Yunnan Minzu University, Kunming 650500, Yunnan, PR China
2Process Metallurgy Research Group, Faculty of Technology, University of Oulu, Finland
3Department of Physics, School of Electrical and Information Technology, Yunnan Minzu University, Kunming 650500, Yunnan, PR China
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 3.5 MB)
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Language: English
Published: Elsevier, 2023
Publish Date: 2023-05-29


Al₂O₃–ZrO₂ composite ceramic is a significant structural material and functional material, and the preparation of high-quality Al₂O₃–ZrO₂ powder is a key step to meeting practical application requirements. The major factor affecting the quality of Al₂O₃–ZrO₂ powder is the drying effect. This paper uses modern microwave drying technology to dry Al₂O₃–ZrO₂ powder. The result was indicative that the average drying rate increases with initial moisture content, initial mass, and microwave heating power. Four dynamic models were applied to fit the empirical data of Al₂O₃–ZrO₂ powder under different pretreatment conditions, the Modified Page model can precisely delineate the Al₂O₃–ZrO₂ microwave drying procedure. To evaluate the changes in samples before and post-drying, the specimens were characterized by Fourier transform infrared spectroscopy. These results demonstrate that microwaves can accelerate the drying of Al₂O₃–ZrO₂ and improve its dispersion. Fick’s second law calculates the effective diffusion coefficient. When the initial moisture content of Al₂O₃–ZrO₂ was 5.6%, the microwave heating power is 560 W, and the initial quality is 15 g, the effective diffusion coefficient of Al₂O₃–ZrO₂ is 0.006361 m²/s. Based on the relevance of the microwave power and activating energy, the activating energy of microwave drying Al₂O₃–ZrO₂ was calculated, which is −34.80 g/W. This paper provides basic study data and theory instructions for microwave drying technology in drying Al₂O₃–ZrO₂ even the drying process in green metallurgy.

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Series: Journal of materials research and technology
ISSN: 2238-7854
ISSN-E: 2214-0697
ISSN-L: 2238-7854
Volume: 24
Pages: 6762 - 6778
DOI: 10.1016/j.jmrt.2023.04.229
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: Financial support from the National Natural Science Foundation of China (No. 51764052) and the Yunnan Provincial Science and Technology Plan Project (No. 202301AU070127).
Copyright information: © 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (