Phase Diagram of (CuInSe2)1-x(FeSe)x alloys

被引：13

作者：

Grima-Gallardo, P. ^{[1
]}

Torres, S. ^{[1
]}

Quintero, M. ^{[1
]}

Nieves, L. ^{[1
]}

Moreno, E. ^{[1
]}

Delgado, G. E. ^{[2
]}

机构：

[1] Univ Los Andes, Fac Ciencias, Dept Fis, CES, Merida 5101, Venezuela

[2] Univ Los Andes, Dept Quim, Lab Cristalog, Merida 5101, Venezuela

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 630卷

关键词：

CuInSe2; FeSe; Alloys; X-ray diffraction; Differential thermal analysis; Phase diagram; ROOM-TEMPERATURE FERROMAGNETISM; ORDER-DISORDER TRANSITION; CRYSTAL-STRUCTURE; ELECTRICAL-PROPERTIES; DIFFRACTION; GROWTH; SYSTEM;

D O I：

10.1016/j.jallcom.2015.01.015

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Polycrystalline samples of the (CuInSe2)(1-x)(FeSe)x alloy system in the composition range 0 6 x 6 1 were prepared by the melt and anneal technique. X-ray Diffraction (XRD) and Differential Thermal Analysis (DTA) techniques were used to characterize the products. From the analysis of the experimental results a T-x phase diagram was proposed. It was found that at 600 K, two single phase fields (chalcopyrite and a semi-ordered phase in space group P (4) over bar 2c) were separated by a relative narrow two phase field in the composition range 0 < x < 0.4. For higher values of x, a secondary phase identified as gamma-Fe7Se8 coexist with the semi-ordered phase for 0.4 < x < 0.7 and with a stannite phase for 0.7 < x < 0.95. The variation with composition of the order-disorder phase transition was well described by an extension of Van Vechten theory. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：146 / 150

页数：5

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