Author

Aman Udani

Publication Date

1996

Document Type

Dissertation/Thesis

First Advisor

Mini, Susan M.||Kimball, Clyde W.

Degree Name

M.S. (Master of Science)

Department

Department of Physics

LCSH

Ceramics--Analysis||Mössbauer spectroscopy||X-ray absorption near edge structure||X-rays--Diffraction||X-ray spectroscopy||Strontium compounds--Analysis

Abstract

A systematic study has been made of the ceramic membrane Sr(Co[sub 0.8]Fe[sub 0.2])O[sub 2.84] in order to elucidate the role of the transition elements in the oxygen diffusion mechanism. The crystal structure of the compound has been determined by X-ray diffraction measurements. The mixed valent behavior of the Fe ion has been examined by X-ray absorption near edge spectroscopy using synchrotron radiation. The temperature dependence of the mixed valent behavior of the Fe ion has been monitored via the magnetic hyperfine interaction by means of Mossbauer spectroscopy. An analysis of the experimental data has resulted in modeling the location of oxygen vacancies in the compound and possible valance behavior of the Co ion.

Comments

Includes bibliographical references (pages [72]-73)

Extent

ix, 86 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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