Calorimetric studies on the crystallization of Li2S-B2O3 glasses

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	Calorimetric studies on the crystallization of Li2S-B2O3 glasses
	Xie, X; Gao, H
	1998-10-01
发表期刊	JOURNAL OF NON-CRYSTALLINE SOLIDS
ISSN	0022-3093
卷号	240 期号:1-3 页码:166-176
摘要	xLi(2)S . (1 - x)B2O3 system glasses have been prepared by liquid nitrogen quenching technique at a cooling rate of about 15 degrees C/s in the absence of water and oxygen. On the basis of Johnson-Mehl-Avrami equation, the isothermal and non-isothermal crystallization kinetics of xLi(2)S . (1 - x)B2O3 glasses have been studied using differential scanning calorimetry. The crystallization activation energy, E, Avrami exponent, n, and crystallization enthalpy, -Delta H, have been estimated. It is found that in xLi(2)S . (1 - x)B2O3 oxysulfide system, glasses can be formed within the composition range of x less than or equal to 0.45. The x = 0.25 glass shows the strongest stability against crystallization, while the x = 0.45 glass is the least stable composition among glass samples. The results indicate that the crystallization is a thermally activated process and it is mainly controlled by a surface nucleation mechanism. The activation energies of crystallization are maximal for glass samples with a particle size of 180-100 mu m. Crystallization enthalpy, -Delta H, and peak temperature, T-p, are linearly dependent. (C) 1998 Elsevier Science E.V. All rights reserved.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/2378
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所
作者单位	Acad Sinica, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
推荐引用方式 GB/T 7714	Xie, X,Gao, H. Calorimetric studies on the crystallization of Li2S-B2O3 glasses[J]. JOURNAL OF NON-CRYSTALLINE SOLIDS,1998,240(1-3):166-176.
APA	Xie, X,&Gao, H.(1998).Calorimetric studies on the crystallization of Li2S-B2O3 glasses.JOURNAL OF NON-CRYSTALLINE SOLIDS,240(1-3),166-176.
MLA	Xie, X,et al."Calorimetric studies on the crystallization of Li2S-B2O3 glasses".JOURNAL OF NON-CRYSTALLINE SOLIDS 240.1-3(1998):166-176.