Vibrational properties of proton conducting double perovskites

被引：23

作者：

Karlsson, M ^{[1
]}

Matic, A

Berastegui, P

Börjesson, L

机构：

[1] Chalmers Univ Technol, Dept Appl Phys, SE-41296 Gothenburg, Sweden

[2] Stockholm Univ, Arrhenius Lab, Dept Inorgan Chem, SE-10691 Stockholm, Sweden

来源：

SOLID STATE IONICS | 2005年 / 176卷 / 39-40期

关键词：

perovskites; Raman; infrared spectroscopy; proton conducting; BCN18; Sr3CaZr0.5Ta1.5O8.75;

D O I：

10.1016/j.ssi.2005.09.033

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：

Raman and infrared spectroscopy results of protonated and dry samples of the proton conducting double perovskites Sr3CaZr0.5Ta1.5O8.75 and Ba3Ca1.18Nb1.82O8.73 (BCN18) are presented. As confirmed by the Raman spectra, the incorporation of protons leads to only small distortions in the host lattice of the perovskites. However, the intensity growth of a band at approximately 650 cm(-1) in the Raman spectrum of Sr3CaZr0.5Ta1.5O8.75 after protonation may be related to a symmetry reduction towards a monoclinic structure. The O-H stretch region in the infrared spectra of Sr3CaZr0.5Ta1.5O8.75 and BCN18 are quite different. stronger bands in the 2000-2500 cm(-1) range in Sr3CaZr0.5Ta1.5O8.75 may be related to the higher concentration of oxygen vacancies in this material after protonation. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：2971 / 2974

页数：4

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