Improving sinterability of ceramics using hybrid microwave heating |
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| Authors: | Zhijian Huang Masahide Gotoh Yukio Hirose |
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| Affiliation: | 1. Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan;2. Department of Risk Base System Engineering, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan;1. School of Electronic and Information Engineering, China West Normal University, Nanchong 637002, China;2. College of Electronics and Information Engineering, Sichuan University, Chengdu 610064, China;3. State Key Laboratory of Electromagnetic Environment, China Aerospace and Science Technology Corporation, Shanghai 200090, China;1. Instituto de Tecnología de Materiales (ITM), Universitat Politècnica de València, Camino de Vera, s/n, 46022 Valencia, Spain;2. Instituto de Aplicaciones de las Tecnologías de la Información y de las Comunicaciones Avanzadas (ITACA), Universitat Politècnica de València, Camino de Vera, s/n, 46022 Valencia, Spain;3. Universidade de São Paulo-FZEA, Avenida Duque Caxias Norte 225, 13635-900 Pirassununga, SP, Brazil |
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| Abstract: | Microwave processing, as a new method for sintering ceramics, has key advantages such as increased heating rate, uniform heating and reduced cost compared to conventional methods. It is generally accepted that microwave sintering can improve the macroscopic mechanical performances of ceramics, however, the performances of microwave-sintered ceramics on the microscopic scale are rarely investigated. In the present study, the ceramics are sintered by hybrid microwave sintering (HMS), which combines the characteristics of microwave heating and conventional heating. To evaluate the homogeneous performance of the sintered ceramics, the behaviors of thermal residual stress distribution in the microwave-sintered and conventionally sintered ceramics were investigated by X-ray diffraction technique. The thermal residual stress investigation shows microwaves can sinter ceramics in entire volume while offering improved mechanical properties. Subsequently, the distribution behaviors of pore ratio and hardness in the ceramics were investigated, respectively. The experiment results confirm that the sinterability of ceramics is homogenously improved by hybrid microwave sintering. |
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