Doctoral Dissertations


"High temperature electrical conductivity, Seebeck coefficient, and thermogravimetric measurements were made as a function of oxygen activity to investigate the electrical transport behavior and defect structure of Ca-doped YCrO3. Defect models were developed to correlate the electrical conductivity and thermogravimetric data by relating the concentration of charge carriers to the acceptor dopant and oxygen vacancy concentrations. These relations were found to adequately explain the experimental data. Thermodynamic properties were calculated which were consistent with the model. Calculations of the carrier concentrations, the activation energies, and the mobilities were also performed. The analysis of the electrical conductivity, Seebeck and mobility data suggested that the conduction process in Ca-doped YCrO3 occurs via the small polaron hopping mechanism. Kroger-Vink diagrams showing the regions of stability with respect to oxygen activity and temperature were constructed"--Abstract, page iii.


Anderson, H. U. (Harlan U.)

Committee Member(s)

Sparlin, Don M.
Moore, Robert E., 1930-2003
Leighly, Hollis P., 1923-2004
Rahaman, M. N., 1950-


Materials Science and Engineering

Degree Name

Ph. D. in Ceramic Engineering


United States. Department of Energy


University of Missouri--Rolla

Publication Date

Fall 1990


xi, 100 pages

Note about bibliography

Includes bibliographical references (pages 93-99).


© 1990 George Francis Carini, II, All rights reserved.

Document Type

Dissertation - Restricted Access

File Type




Subject Headings

Electric conductivity -- Measurement
Thermoelectric materials
Thermal conductivity

Thesis Number

T 6114

Print OCLC #


Electronic OCLC #


Link to Catalog Record

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