Doctoral Dissertations

Abstract

"Mg-doped LaCrO3 and La-doped SrTiO3 are perovskite compounds that display electrical conductivity which is a function of partial pressure of oxygen (po2). It has been proposed that acceptor-doped LaCrO3 becomes highly resistive at low po2's due to ionic compensation of the acceptor-dopant present by oxygen vacancies. SrTiO3 has been thought to absorb O2 into a crystallographic shear structure and exsolve strontium vacancies which can then ionically compensate the La present and give a high resistance at high po2's.

Given these models, relationships between weight loss and conductivity vs. po2 are developed for both these materials and compared to experiment. Positive confirmation of the models was found, however SrTiO3 displayed a mobility that was a function of temperature and strontium vacancy concentration"--Abstract, page ii.

Advisor(s)

Anderson, H. U. (Harlan U.)

Committee Member(s)

Sparlin, Don M.
Kreidl, N. J.
Morris, Arthur E., 1935-
Moore, Robert E., 1930-2003

Department(s)

Materials Science and Engineering

Degree Name

Ph. D. in Ceramic Engineering

Publisher

University of Missouri--Rolla

Publication Date

Spring 1984

Pagination

xv, 141 pages

Note about bibliography

Includes bibliographical references (pages 63-65).

Rights

© 1984 Brian Keith Flandermeyer, All rights reserved.

Document Type

Dissertation - Restricted Access

File Type

text

Language

English

Thesis Number

T 5060

Print OCLC #

11698832

Link to Catalog Record

Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.

http://laurel.lso.missouri.edu/record=b1633384~S5

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