The Effect of Hydrostatic Pressure on The Ionic Conductivity of Some Crystals With The Fluorite Structure

The effect of hydrostatic pressure on the ionic conductivity of CaF(,2), SrF(,2), BaF(,2), CdF(,2, )SrC(, 2), PbF(,2), PbC (,2), PbBr(,2) and PbI(,2) has been studied for pressures up to 0.6 GPa and temperatures up to near the melting point. The activation volumes for extrinsic vacancy motion were obtained from the effect of pressure on the conductivity of doped and oxygen contaminated samples. The formation volumes of intrinsic defects were calculated from measured activation volumes at high temperatures. The defect formation volumes are found to be uniformly small and consistent with the dominance of Frenkel defects in all cases except PbC (,2) and PbBr(,2), where large formation volumes were observed, indicating Schottky defects.(,)

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Oberschmidt, James Michael

• Physics, Condensed Matter

Language dc:language

eng

Identifier

(UMI)AAI8018192

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/77187