Intrinsic LiNbO3 melt species partitioning at the congruent melt composition II. Dynamic interface case

William A. Tiller, Satoshi Uda

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

Crystal growth from a stirred melt is discussed by considering the relationship of a phase diagram partition coefficient, kj0, and its effective partition coefficient, kjE, for all of the seven LiNbO3 intrinsic species. Here, the interface electric field become s an extremely important variable for the crystallization process. The causes of these electric fields, i.e., the thermoelectric power and the charge separation effects (crystallization EMF), are a function of growth velocity, V, temperature gradient, GL, and solute boundary layer thickness, δC. Additionally, the chemical conversion reactions in the melt are taken into account. The above considerations eventually lead us to discuss conditions for the dynamic congruent-state growth of LiNbO3 via the Czochralski technique and to set up the most appropriate congruent composition for each bulk crystal growth condition from a finite amount of melt, 1-g. For the best congruent-state growth, one must find an appropriate combination of δC(g), V(g) and GL(g) which satisfies the conditions that, as much as possible, lead to a crystal with approximately constant composition.

Original languageEnglish
Pages (from-to)341-361
Number of pages21
JournalJournal of Crystal Growth
Volume129
Issue number1-2
DOIs
Publication statusPublished - 1993 Mar 2
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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