Mechanochemical-thermal preparation and structural studies of mullite-type Bi2(GaxAl1-x)4O9 solid solutions

被引：10

作者：

Da Silva, K. L. ^{[2
,3
,4
]}

Sepelak, V. ^{[1
]}

Duevel, A. ^{[3
]}

Paesano, A., Jr. ^{[4
]}

Hahn, H. ^{[1
]}

Litterst, F. J. ^{[5
]}

Heitjans, P. ^{[3
]}

Becker, K. D. ^{[2
]}

机构：

[1] Karlsruhe Inst Technol, Inst Nanotechnol, D-76344 Eggenstein Leopoldshafen, Germany

[2] Tech Univ Carolo Wilhelmina Braunschweig, Inst Phys & Theoret Chem, D-38106 Braunschweig, Germany

[3] Leibniz Univ Hannover, Inst Phys Chem & Electrochem, D-30167 Hannover, Germany

[4] Univ Estadual Maringa, Dept Phys, BR-87020900 Maringa, Parana, Brazil

[5] Tech Univ Carolo Wilhelmina Braunschweig, Inst Condensed Matter Phys, D-38106 Braunschweig, Germany

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2011年 / 184卷 / 05期

关键词：

Mullite; Mechanochemical processing; Cation distribution; Rietveld refinement; NMR; OXIDE-ION CONDUCTIVITY; CRYSTAL-STRUCTURE; BI2AL4O9; BI2GA4O9;

D O I：

10.1016/j.jssc.2011.04.007

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of Bi-2(GaxAl1-x)(4)O-9 solid solutions (0 <= x <= 1), prepared by mechanochemical processing of Bi2O3/Ga2O3/Al2O3 mixtures and subsequent annealing, was investigated by XRD, EDX, and Al-27 MAS NMR. The structure of the Bi-2(GaxAl1-x)(4)O-9 solid solutions is found to be orthorhombic, space group Pbam (No. 55). The lattice parameters of the Bi-2(GaxAl1-x)(4)O-9 series increase linearly with increasing gallium content. Rietveld refinement of the XRD data as well as the analysis of the Al-27 MAS NMR spectra show a preference of gallium cations for the tetrahedral sites in Bi-2(GaxAl1-x)(4)O-9. As a consequence, this leads to a far from random distribution of Al and Ga cations across the whole series of solid solutions. (C) 2011 Elsevier Inc. All rights reserved.

引用

页码：1346 / 1352

页数：7

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