Topotactic H+/Li+ ion exchange on La2/3-xLi3xTiO3:: New metastable perovskite phases La2/3-xTiO3-3x(OH)3x and La2/3-xTiO3-3x/2 obtained by further dehydration

被引：32

作者：

Bhuvanesh, NSP

Bohnke, O

Duroy, H

Crosnier-Lopez, MP

Emery, J

Fourquet, JL

机构：

[1] Univ Maine, Lab Fluorures, UPRESA 6010 CNRS, Fac Sci Mans, F-72085 Le Mans 9, France

[2] Univ Maine, Lab Phys Etat Condense, UPRESA 6087 CNRS, Fac Sci Mans, F-72085 Le Mans, France

来源：

MATERIALS RESEARCH BULLETIN | 1998年 / 33卷 / 11期

关键词：

oxides; chemical synthesis; X-ray diffraction; defects; ionic conductivity;

D O I：

10.1016/S0025-5408(98)00170-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have synthesized novel La2/3-xTiO3-3x(OH)(3x) (0.07 < x < 0.13) compounds by ion exchange of the lithium ions from La2/3-xLi3xTiO3 in dilute HNO3 at 60 degrees C. The proton derivatives crystallize in tetragonal perovskite cells (a approximate to a(p), c approximate to 2a(p)) similar to those of the parent oxides. Interestingly, the protonated oxides (characterized by X-ray diffraction (XRD), thermogravimetric analysis (TGA), and H-1 nuclear magnetic resonance (NMR) yield new metastable A-site- and oxygen-deficient perovskites La2/3-xTiO3-3x/2 at about 800 degrees C. (C) 1998 Elsevier Science Ltd.

引用

页码：1681 / 1691

页数：11

共 19 条

[1] X-RAY STUDY OF DEFICIENT PEROVSKITE LA2-3TIO3 [J].