Journal of the Chinese Ceramic Society, Volume. 51, Issue 3, 757(2023)

Effect of Lepidolite on Mechanical Properties of Mullite-Corundum Composite Ceramics Prepared By Low Temperature Sintering of Bauxite Tailings

CHEN Xinyi*, WANG Qi, FANG Minghao, HU Xinyue, LIU Yangai, WU Xiaowen, MI Ruiyu, HUANG Zhaohui, and MIN Xin
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    With bauxite tailings as the main raw material, adding bauxite clinker and lithium chinaite to prepare the traditional mulite-corundum multiphase ceramics, adding different contents of lepidolite, to explore the influence of the properties of mulite-corundum multiphase ceramics. The phase composition and morphology of ceramics were analyzed by X-ray diffractometer and scanning electron microscope. The effects of lepidolite content and sintering temperature on the mechanical properties of ceramics were studied. The results show that: The addition of lepidolite can reduce the sintering temperature and improve the strength of ceramics. When 10% lepidolite is added and the sintering temperature is 950 ℃, the strength of mulite-corundum multiphase ceramics is the highest, and the ceramics phase composition is corundum, mullite, quartz, hematite, rutile and glass, and the volume density is 1.75 g/cm3, the thermal conductivity is 0.447 W/(m·K), the linear shrinkage is 5.47%, and the compressive strength is 74.87 MPa. It has a wide application prospect in the fields of thermal storage ceramics and refractory materials.

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    CHEN Xinyi, WANG Qi, FANG Minghao, HU Xinyue, LIU Yangai, WU Xiaowen, MI Ruiyu, HUANG Zhaohui, MIN Xin. Effect of Lepidolite on Mechanical Properties of Mullite-Corundum Composite Ceramics Prepared By Low Temperature Sintering of Bauxite Tailings[J]. Journal of the Chinese Ceramic Society, 2023, 51(3): 757

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    Paper Information

    Category:

    Received: Aug. 15, 2022

    Accepted: --

    Published Online: Apr. 10, 2023

    The Author Email: Xinyi CHEN (chenxinyi521314@163.com)

    DOI:

    CSTR:32186.14.

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