Novel two-step process for synthesising beta-SiC whiskers from coal fly ash and water glass
Luo, Yang1,2; Zheng, Shili1; Ma, Shuhua1; Liu, Chunli1,2; Ding, Jian1; Wang, Xiaohui1
2018-06-15
发表期刊CERAMICS INTERNATIONAL
ISSN0272-8842
卷号44期号:9页码:10585-10595
摘要Highly crystalline, high-purity beta-SiC whiskers were successfully synthesised from a mixed sol of coal fly ash (CFA) and water glass (a silicon resource), and activated carbon (a carbon source) in a carbothermic reduction. The efficiency of the process is over 70%. The alkali activation effects of the water glass on CFA were characterised by FTIR and MAS-NMR. In the activation reaction, silicate frameworks of water glass and CFA became connected to form a large network, producing a stable, uniform sol system. Experiments and thermodynamic analyses were used to study the effects of Na2O, Al2O3, and Fe2O3 on the synthesis of beta-SiC whiskers, revealing that Na2O does not affect the synthesis process while Al2O3 and Fe2O3 promote the elongation of the SiC whiskers. The results of this study may not only help to reduce the production cost of SiC whiskers but also allow value to be extracted from waste.
关键词Sic Whisker Coal Fly Ash Water Glass Alkali-activation Carbothermic Reduction
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.ceramint.2018.03.082
收录类别SCI
语种英语
关键词[WOS]SILICON-CARBIDE ; SODIUM-SILICATE ; ADIABATIC FOAM ; STRUCTURAL-CHARACTERIZATION ; CARBOTHERMAL REDUCTION ; STACKING-FAULTS ; LOW-TEMPERATURE ; WASTE ; NANOWIRES ; MECHANISM
WOS研究方向Materials Science
WOS类目Materials Science, Ceramics
项目资助者Major State Basic Research Development Program of China(2013CB632601)
WOS记录号WOS:000431470200073
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/24426
专题湿法冶金清洁生产技术国家工程实验室
作者单位1.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Luo, Yang,Zheng, Shili,Ma, Shuhua,et al. Novel two-step process for synthesising beta-SiC whiskers from coal fly ash and water glass[J]. CERAMICS INTERNATIONAL,2018,44(9):10585-10595.
APA Luo, Yang,Zheng, Shili,Ma, Shuhua,Liu, Chunli,Ding, Jian,&Wang, Xiaohui.(2018).Novel two-step process for synthesising beta-SiC whiskers from coal fly ash and water glass.CERAMICS INTERNATIONAL,44(9),10585-10595.
MLA Luo, Yang,et al."Novel two-step process for synthesising beta-SiC whiskers from coal fly ash and water glass".CERAMICS INTERNATIONAL 44.9(2018):10585-10595.
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