CAS OpenIR  > 湿法冶金清洁生产技术国家工程实验室
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
Source PublicationCERAMICS INTERNATIONAL
ISSN0272-8842
Volume44Issue:9Pages:10585-10595
AbstractHighly 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.
KeywordSic Whisker Coal Fly Ash Water Glass Alkali-activation Carbothermic Reduction
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.ceramint.2018.03.082
Indexed BySCI
Language英语
WOS KeywordSILICON-CARBIDE ; SODIUM-SILICATE ; ADIABATIC FOAM ; STRUCTURAL-CHARACTERIZATION ; CARBOTHERMAL REDUCTION ; STACKING-FAULTS ; LOW-TEMPERATURE ; WASTE ; NANOWIRES ; MECHANISM
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
Funding OrganizationMajor State Basic Research Development Program of China(2013CB632601)
WOS IDWOS:000431470200073
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/24426
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.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
Recommended Citation
GB/T 7714
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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