CAS OpenIR  > 湿法冶金清洁生产技术国家工程实验室
Mullite-based ceramic tiles produced solely from high-alumina fly ash: Preparation and sintering mechanism
Luo, Yang1,2; Ma, Shuhua1; Zheng, Shili1; Liu, Chunli1,2; Han, Dajie1,3; Wang, Xiaohui1
2018-01-25
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume732Pages:828-837
AbstractMullite-based ceramic tiles were successfully prepared using only high-alumina fly ash (HAFA) at relatively low sintering temperatures (1100-1400 degrees C). The effects of alkali activation on the chemical composition, mineral phase, and morphology of the HAFA were respectively characterised by ICP-OES, XRD, and SEM methods. The alkali-activation pretreatment not only modifies the chemical composition of HAFA to match that of mullite, but also can introduce Na-rich compounds to promote sintering. The macroscopic and microscopic characteristics of the fully ash-based ceramic tiles formed at different sintering temperatures were examined. The ceramic samples sintered at 1300 degrees C exhibited optimal post-sintering properties (relative density: 90.85%, water absorption: 0.10%, rupture modulus: 109.67 MPa, linear shrinkage: 15.70%, and apparent porosity: 0.68%) and a well-developed cubic puncheon-shaped mullite morphology. Finally, through the isothermal sintering method, the melt viscosities and the sintering kinetics were calculated theoretically, and the results show that the alkali activation could dramatically reduce the melt viscosity and the apparent activation energy. This research may provide a new method in utilising the vast amounts of HAFA waste to produce mullite-based ceramic tiles at low costs. (C) 2017 Elsevier B.V. All rights reserved.
KeywordMullite Ceramics Liquid-solid Reactions Sintering Kinetics Microstructure Mechanical Properties
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.jallcom.2017.09.179
Indexed BySCI
Language英语
WOS KeywordMAGMATIC SILICATE LIQUIDS ; HIGH-STRENGTH ; PHASE ; TEMPERATURE ; VISCOSITY ; COAL ; MELTS ; GLASS ; DENSIFICATION ; FABRICATION
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationMajor State Basic Research Development Program of China(2013CB632601)
WOS IDWOS:000415931900098
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/23446
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, 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
3.Beijing Univ Chem Technol, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Luo, Yang,Ma, Shuhua,Zheng, Shili,et al. Mullite-based ceramic tiles produced solely from high-alumina fly ash: Preparation and sintering mechanism[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,732:828-837.
APA Luo, Yang,Ma, Shuhua,Zheng, Shili,Liu, Chunli,Han, Dajie,&Wang, Xiaohui.(2018).Mullite-based ceramic tiles produced solely from high-alumina fly ash: Preparation and sintering mechanism.JOURNAL OF ALLOYS AND COMPOUNDS,732,828-837.
MLA Luo, Yang,et al."Mullite-based ceramic tiles produced solely from high-alumina fly ash: Preparation and sintering mechanism".JOURNAL OF ALLOYS AND COMPOUNDS 732(2018):828-837.
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