Kinetics of nonisothermal crystallization of Cs2O-Fe2O3-P2O5 glasses

被引：9

作者：

Joseph, Kitheri ^{[1
]}

Krishnan, R. Venkata ^{[1
]}

Kutty, K. V. Govindan ^{[1
]}

Rao, P. R. Vasudeva ^{[1
]}

机构：

[1] Indira Gandhi Ctr Atom Res, Chem Grp, Kalpakkam 603102, Tamil Nadu, India

来源：

THERMOCHIMICA ACTA | 2011年 / 512卷 / 1-2期

关键词：

Crystallization kinetics; Differential scanning calorimetry; Nonisothermal; Isoconversional; Activation energy; IRON PHOSPHATE-GLASSES; ISOCONVERSIONAL ANALYSIS; ACTIVATION-ENERGY;

D O I：

10.1016/j.tca.2010.09.001

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The crystallization kinetics of Cs2O-Fe2O3-P2O5 glasses containing 12.5-27 mol% Cs2O were studied by using differential scanning calorimetry under nonisothermal conditions. Strong dependence of activation energy with temperature was observed, indicating the complex nature of the crystallization process. The various crystallization products were identified by X-ray diffraction technique. CsFeP2O7 was found to be the major crystalline phase in all cases. The overall activation energy obtained by classical model-free kinetic method was compared with that of isoconversional method: and from the results, the dependence of activation energy on extent of reaction and average temperature was delineated. (C) 2010 Published by Elsevier B.V.

引用

页码：67 / 70

页数：4

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