EFFECT OF PREVIOUS HEAT-TREATMENT ON IONIC-CONDUCTIVITY OF YTTRIUM-DOPED KBR CRYSTALS

Authors
REDDY BJM REDDY KN
Citation
Bjm. Reddy et Kn. Reddy, EFFECT OF PREVIOUS HEAT-TREATMENT ON IONIC-CONDUCTIVITY OF YTTRIUM-DOPED KBR CRYSTALS, Materials science & engineering. B, Solid-state materials for advanced technology, 21(1), 1993, pp. 1-4
Citations number
14
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
Materials science & engineering. B, Solid-state materials for advanced technology → ACNP
ISSN journal
09215107
Volume
21
Issue
1
Year of publication
1993
Pages
1 - 4
Database
ISI
SICI code
0921-5107(1993)21:1<1:EOPHOI>2.0.ZU;2-B
Abstract
Ionic conductivity studies have been carried out on KBr:Y crystals at different temperatures. The conductivity temperature plot of KBr:Y exh ibits a well-known three-stage conductivity in the temperature range 1 00-560-degrees-C. From the analysis of these plots activation energies for the migration of cation vacancies, the formation of Schottky pair s, the association of yttrium ion with a cation vacancy etc. are calcu lated. The conductivity of KBr:Y after quenching from elevated tempera ture is found to decrease. This result in comparison with optical abso rption results is explained on the basis of formation of impurity vaca ncy dipoles, precipitates and clusters.