Doctoral Dissertations

Abstract

"High temperature dielectric measurements have been performed on the ferroelectric and antiferroelectric perovskitic polycrystalline solid solutions in the BiFeO3-PbTiO3-PbZrO3 ternary system. The data were taken in the UHF frequency range with the use of a slotted line and specially constructed sample holder capable of operation at temperatures in excess of 800°C.

The Curie points have been found to occur at progressively higher temperatures with the increase of BiFeO3 content in the solutions except in phase transition regions where minima can occur. The dielectric constants at the Curie temperatures have been found to decrease with BiFeO3 content increase. Extrapolation procedures yielded a Curie point dielectric constant near 1300 for The Curie point of BiFeO3. The Curie point of BiFeO3 was found to occur at 850- 900°C.

The dielectric data demonstrate that BiFeO3 and solutions of PbTiO3 and PbZrO3 with high BiFeO3 content are ferroelectric or antiferroelectric. A discussion is presented, utilizing crystallographic data, which indicate that BiFeO3 is probably ferroelectric"--Abstract, page i.

Advisor(s)

Gerson, Robert, 1923-2013

Committee Member(s)

James, William Joseph
Furlong, LeRoy R.
McFarland, Charles E.
Rivers, Jack L.
Carson, Ralph S.

Department(s)

Physics

Degree Name

Ph. D. in Physics

Sponsor(s)

U. S. Atomic Energy Commission

Publisher

University of Missouri at Rolla

Publication Date

1967

Pagination

x, 156 pages

Note about bibliography

Includes bibliographical references (pages 122-127).

Rights

© 1967 Robert Travis Smith, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Library of Congress Subject Headings

Ferroelectric crystals -- Magnetic properties
Antiferromagnetism
Perovskite
Dielectric measurements

Thesis Number

T 1971

Print OCLC #

5980486

Electronic OCLC #

913794664

Comments

Atomic Energy Commission (project AT (11-1)1368) provided financial support in the form of a research fellowship during the course of this investigation.

Included in

Physics Commons

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