期刊
CERAMICS INTERNATIONAL
卷 45, 期 5, 页码 5613-5616出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.12.021
关键词
Coal fly ash; Mullite whisker; Pickling; Phase structure; Microstructure
资金
- Talents Training Project of Shanxi Graduate Joint Training Base [2016JD37, 2017JD33]
- Shanxi Province Science Foundation [201601D102019]
- Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi [2016059]
- Doctoral Research Start-up Fund of Taiyuan University of Science and Technology [20142025]
- Fund for Collaborative Innovation Center of Shanxi Key Basic Materials
- Fund for Shanxi Key Subjects Construction
Ceramics with mullite whiskers were prepared from coal fly ash and Al2O3 raw materials, with AIF(3) used as an additive. The phase structures and microstructures of the ceramics were identified via X-ray diffraction and scanning electron microscopy, respectively. The results show that pickling of coal fly ash is an effective method for enhancing the flexural strength of ceramics. Sintering temperature and AlF3 addition were also key factors influencing the creation of ideal ceramics. The ceramic made from pickled coal fly ash, 6 wt% AlF3, and sintered at 1200 degrees C, exhibited the highest flexural strength of 59.1 MPa, and had a bulk density of 1.32 g/cm(3) and porosity of 26.8%. The results show that ceramic materials made under these conditions are ideal candidates for manufacturing ceramic proppants for the exploitation of unconventional oil and gas resources.
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