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	High-temperature dehydration of talc: a kinetics study using in situ x-ray powder diffraction
	Wang, Duojun1; Yi, Li2; Huang, Bojin1; Liu, Chuanjiang1
刊名	Phase transitions
	2015-06-03
卷号	88期号:6页码:560-566
关键词	Dehydration kinetics Phase transition Talc Reaction mechanism
ISSN号	0141-1594
DOI	10.1080/01411594.2014.1002092
通讯作者	Wang, duojun(duojunwang@ucas.ac.cn)
英文摘要	High-temperature in situ x-ray powder diffraction patterns were used to study the dehydration kinetics of natural talc with a size of 10-15 mu m. the talc was annealed from 1073 to 1223 k, and the variations in the characteristic peaks corresponding to talc with the time were recorded to determine the reaction progress. the decomposition of talc occurred, and peaks corresponding to talc and peaks corresponding to enstatite and quartz were observed. the enstatite and talc exhibited a topotactic relationship. the dehydration kinetics of talc was studied as a function of temperature between 1073 and 1223 k. the kinetics data could be modeled using an avrami equation that considers nucleation and growth processes alpha=1-exp(-kt(n)) where n varies from 0.4 to 0.8. the rate constant (k) equation for the natural talc is ln k=ln(3.2e+14)-366.5/rt the reaction mechanism for the dehydration of talc is a heterogeneous nucleation and growth mechanism.
WOS关键词	DEHYDROXYLATION
WOS研究方向	Crystallography ; Physics
WOS类目	Crystallography ; Physics, Condensed Matter
语种	英语
出版者	TAYLOR & FRANCIS LTD
WOS记录号	WOS:000354456900002
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2376601
专题	中国科学院大学
通讯作者	Wang, Duojun
作者单位	1.Chinese Acad Sci, Grad Univ, Key Lab Computat Geodynam, Beijing, Peoples R China 2.China Earthquake Adm, Inst Earthquake Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Duojun,Yi, Li,Huang, Bojin,et al. High-temperature dehydration of talc: a kinetics study using in situ x-ray powder diffraction[J]. Phase transitions,2015,88(6):560-566.
APA	Wang, Duojun,Yi, Li,Huang, Bojin,&Liu, Chuanjiang.(2015).High-temperature dehydration of talc: a kinetics study using in situ x-ray powder diffraction.Phase transitions,88(6),560-566.
MLA	Wang, Duojun,et al."High-temperature dehydration of talc: a kinetics study using in situ x-ray powder diffraction".Phase transitions 88.6(2015):560-566.

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