Thermogravimetric and electrical conductivity studies of Mg-doped LaCrO₃ and La-doped SrTiO₃

Author

Brian Keith Flandermeyer

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 - Open Access

File Type

text

Language

English

Thesis Number

T 5060

Print OCLC #

11698832

Electronic OCLC #

1105931577

Recommended Citation

Flandermeyer, Brian Keith, "Thermogravimetric and electrical conductivity studies of Mg-doped LaCrO₃ and La-doped SrTiO₃" (1984). Doctoral Dissertations. 551.
https://scholarsmine.mst.edu/doctoral_dissertations/551