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51. |
Resolution of Thermal Peaks of Kaolinite in Thermomechanical Analysis and Differential Thermal Analysis Studies |
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Journal of the American Ceramic Society,
Volume 75,
Issue 7,
1992,
Page 2013-2016
Akshoy K. Chakraborty,
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PDF (386KB)
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摘要:
The recent findings for the kaolinite metakaolinite, cubic‐mullite, and orthorhombic‐mullite reaction series have been thoroughly examined by differential thermomechanical analysis (DTMA) and differential thermal analysis (DTA). Metakaolinite shows two differential contraction peaks in the vicinity of 980°C caused by final dehydroxylation at the endothermic dip just before 980°C in DTA with expulsion of 35–37 wt% SiO2, formation of a defect aluminosilicate phase and simultaneous contraction of the latter phase, and crystallization of cubic mullite at the 980°C exotherm in DTA. Mullitization takes place in two simultaneous reaction steps: (i) polymorphic transformation of cubic mullite to orthorhombic mullite during the ∼1250°C exotherm shown by DTA which coincides with the differential expansion peak in DTMA and (ii) nucleation followed by crystallization of orthorhombic mullite from the residual aluminosilicate compact phase during the ∼1330°C exotherm shown by DTA. The aluminosilicate formed during the large differential contraction at 1100°–1400°C as shown by DTMA. These results, obtained by the two physical techniques, corroborate earlier findings of the kaolinite tra
ISSN:0002-7820
DOI:10.1111/j.1151-2916.1992.tb07238.x
出版商:Blackwell Publishing Ltd
年代:1992
数据来源: WILEY
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52. |
Comment on “Interfacial Segregation in Perovskites: I‐IV” |
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Journal of the American Ceramic Society,
Volume 75,
Issue 7,
1992,
Page 2017-2019
Yet‐Ming Chiang,
Touichi Takagi,
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PDF (406KB)
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ISSN:0002-7820
DOI:10.1111/j.1151-2916.1992.tb07239.x
出版商:Blackwell Publishing Ltd
年代:1992
数据来源: WILEY
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53. |
Reply to “Comment on ‘Interfacial Segregation in Perovskites: I–IV’” |
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Journal of the American Ceramic Society,
Volume 75,
Issue 7,
1992,
Page 2020-2024
Seshu B. Desu,
David A. Payne,
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PDF (583KB)
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ISSN:0002-7820
DOI:10.1111/j.1151-2916.1992.tb07240.x
出版商:Blackwell Publishing Ltd
年代:1992
数据来源: WILEY
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