Chemical composition topography in RE hexaboride crystals obtained by various solution-melt methods

被引：4

作者：

Gurin, Vladimir ^{[1
]}

Konovalov, Mihail ^{[1
,3
]}

Kuzanyan, Armen ^{[2
]}

Petrosyan, Vahagn ^{[2
]}

Burkhardt, Ulrich ^{[3
]}

Grin, Juri ^{[3
]}

机构：

[1] Russian Acad Sci, AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

[2] Natl Acad Sci, Inst Phys Res, Ashtarak 0203 2, Armenia

[3] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

来源：

SOLID STATE SCIENCES | 2012年 / 14卷 / 11-12期

关键词：

Chemical composition topography; RE hexaboride single crystals;

D O I：

10.1016/j.solidstatesciences.2012.07.022

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

An extensive step-by-step study of the chemical composition of rare-earth metal (RE) hexaboride single crystals and their solid solutions has done. The EDX and WDX methods were used for this study. The composition topography of the surface has been investigated in two directions: along the length and breadth of the crystals. It was done for two times: after separation from the Al matrix and after an additional etching and polishing. There was a considerable dispersion of data in the crystals obtained using the solution-melt methods (the conventional and the immiscibility gap method), and also the liquid-phase method (floating zone). An assumption that the direction of growth of single crystals is opposite to the direction of monotonic change of the boron content has been suggested. We have concluded that all single crystals of RE hexaboride grown by different methods are significantly different on composition. This conclusion was made due to the respective relative position of the stoichiometry line and the homogeneity region of the compound which crystals have been obtained. (C) 2012 Elsevier Masson SAS. All rights reserved.

引用

页码：1705 / 1709

页数：5

共 12 条

[1]

Gulian A., 2011, P SOC PHOTO-OPT INS, V7998, P7998

[2]

Gurin V.N., 1973, IAN SSSR NEORG MATER, V9, P1289

[3]

Gurin V.N., 1983, PROG CRYST GROWTH CH, V16, P143

[4] Binary immiscible metal systems for preparation of borides [J].

Gurin, Vladimir N. ;

Burkhardt, Ulrich ;

Grin, Yuri .

16TH INTERNATIONAL SYMPOSIUM ON BORON, BORIDES AND RELATED MATERIALS (ISBB 2008), 2009, 176

[5]

GURIN VN, 1984, FIZ TVERD TELA+, V26, P1091

[6] CRYSTAL-GROWTH OF REFRACTORY COMPOUNDS FROM SOLUTIONS IN METALLIC MELTS [J].

GURIN, VN ;

KORSUKOVA, MM .

PROGRESS IN CRYSTAL GROWTH AND CHARACTERIZATION OF MATERIALS, 1983, 6 (01) :59-101

[7]

KORSUKOVA MM, 1987, USP KHIM, V56, P3

[8]

KORSUKOVA MM, 1984, CURRENT TOPICS MATER, V11, P389

[9]

Kroger F., 1969, CHEM IMPERFECT CRYST, P29

[10]

Niihara K., 1971, 9 RAR EARTH RES C BL

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