Vibrational properties of proton conducting double perovskites
Vibrational properties of proton conducting double perovskites
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DOI：
10.1016/j.ssi.2005.09.033
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发表时间：
2005-12-01
影响因子：
3.2
通讯作者：
Börjesson, L
中科院分区：
文献类型：
--
作者：
Karlsson, M;Matic, A;Börjesson, L
介绍了质子传导双钙钛矿 Sr3CaZr0.5Ta1.5O8.75 和 Ba3Ca1.18Nb1.82O8.73 (BCN18) 的质子化和干燥样品的拉曼和红外光谱结果。正如拉曼光谱所证实的，质子的掺入仅导致钙钛矿的主晶格发生很小的扭曲。然而，质子化后Sr3CaZr0.5Ta1.5O8.75拉曼光谱中约650 cm(-1)处的谱带强度增长可能与单斜结构的对称性降低有关。 Sr3CaZr0.5Ta1.5O8.75和BCN18的红外光谱中的O-H伸缩区域有很大不同。 Sr3CaZr0.5Ta1.5O8.75中2000-2500 cm(-1)范围内较强的能带可能与质子化后该材料中氧空位浓度较高有关。 (c) 2005 Elsevier B.V. 保留所有权利。
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.