Masters Theses

Abstract

"Electrical conductivity and Seebeck coefficient measurements for the La1-xCaxAl1-yCryO3 system were carried out as a function of temperature and composition for the 20% Ca/Cr ratio series, in which the amount of Ca and Cr were kept at a fixed 1:5 ratio; the La0.80Ca0.20(Al,Cr)O3 series; and the (La,Ca)AlO3 series. The conductivity results for the 20% Ca/Cr ratio series and La0.80Ca0.20(Al,Cr)O3 series indicate that those systems can be related to a site percolation model in which small polarons hop between available Cr sites. This is exemplified by the temperature independent Seebeck coefficients. Conductivity is attributed to the mixed electronic and ionic compensation of Ca in the (La,Ca)AlO3 series and when y 0.80Ca0.20(Al,Cr)O3 series"--Abstract, page ii.

Advisor(s)

Anderson, H. U. (Harlan U.)

Committee Member(s)

Sparlin, Don M.
Nasrallah, Magdi M.

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Ceramic Engineering

Publisher

University of Missouri--Rolla

Publication Date

Summer 1993

Pagination

x, 77 pages

Note about bibliography

Includes bibliographical references (pages 74-76).

Rights

© 1993 John Andrew Conrad, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Thesis Number

T 6626

Print OCLC #

29304590

Electronic OCLC #

1053901572

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