Bulletin of the Chinese Ceramic Society, Volume. 42, Issue 3, 960(2023)
Preparation and Properties of Coal Gangue-Based Foamed Ceramics
Coal gangue and waste glass were used as main raw materials to prepare foamed ceramics. The effects of calcination temperature and content of Na3PO4 on phase structure, apparent porosity, compressive strength and apparent density of foamed ceramics were studied. The results show that, as the calcination temperature increases, the linear expansion rate of foamed ceramics samples gradually increases, while the apparent density gradually decreases. The average pore diameter and apparent porosity of foamed ceramics gradually increase and the compressive strength decreases as the calcination temperature or the Na3PO4 content increases, while the apparent density shows different trends and the crystallite structure of the sample changes very slightly. By optimizing the preparation conditions, it is found that when the content of Na3PO4 is 3% (mass fraction) at the calcination temperature of 1 140 ℃, the prepared foamed ceramics exhibits uniform pore structure with the average pore diameter of 0.92 mm, the compressive strength reaches as high as 4.72 MPa, and the apparent density achieves 0.69 g/cm3. The preparation process of foamed ceramics based on coal gangue is simple and the cost is low, which provides a feasible way for the utilization of coal gangue resources.
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ZHANG Jinghao, MENG Fanhui, WANG Lina, DAI Lufei, YAO Longfan, LI Zhong. Preparation and Properties of Coal Gangue-Based Foamed Ceramics[J]. Bulletin of the Chinese Ceramic Society, 2023, 42(3): 960
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Received: Nov. 10, 2022
Accepted: --
Published Online: Apr. 14, 2023
The Author Email: Fanhui MENG (mengfanhui@tyut.edu.cn)
CSTR:32186.14.