ITC technique as tool to monitor a new phase nucleation in LiF:Ti single crystals

Rosanna Capelletti, Istvan Foldvari, Carlo Mora, Stefano Prato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Thermal treatment of LiF:Ti3+ at temperatures close to the melting point in a moist atmosphere causes the growth of new phase occlusions. Optical and electron microscopy and X-ray diffraction have shown that they are parallelepipeds and cubes of a face-centered-cubic phase coherent with the host matrix. ITC (ionic thermoconductivity) spectra support that the crystal behaves as an inhomogeneous dielectric; in fact the occlusion growth is accompanied by the appearance of new ITC bands at the expense of the band due to the reorientation of dipoles built by Ti3+ and two cation vacancies. The nucleation kinetics has been studied in this way and the Maxwell-Wagner-Sillars model was applied to interpret the ITC spectra.

Original languageEnglish
Title of host publicationProceedings - International Symposium on Electrets
PublisherPubl by IEEE
Pages539-544
Number of pages6
ISBN (Print)0780301129
Publication statusPublished - Jan 1 1992
Event7th International Symposium on Electrets - Berlin, Germ
Duration: Sep 25 1991Sep 27 1991

Publication series

NameProceedings - International Symposium on Electrets

Other

Other7th International Symposium on Electrets
CityBerlin, Germ
Period9/25/919/27/91

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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  • Cite this

    Capelletti, R., Foldvari, I., Mora, C., & Prato, S. (1992). ITC technique as tool to monitor a new phase nucleation in LiF:Ti single crystals. In Proceedings - International Symposium on Electrets (pp. 539-544). (Proceedings - International Symposium on Electrets). Publ by IEEE.