THM Growth of Materials for Electro-Optic Light Modulators

Abstract

The report summarizes the year's work in growth of crystals of electrooptic materials from a solvent zone (a growth method designated THM). Single crystals of proustite (Ag3AsS3) and a crystal of Bi(12)TiO(20) were achieved. Extensive effort on growth of CdSnAs2 from Sn and CdGeAs2 from Pb zones did not yield useful-sized crystals even after significant improvements in the THM arrangement. Investigations of the phase equilibria determined that in each case a phase other than the desired ternary arsenide was on the verge of crystallizing from the solvent zone. Also, it was deduced that constitutional supercooling occurred in the diffusion boundary layer of the THM runs on both systems. The contrasting results on proustite and the II-IV-V2 compounds are attributed to different degrees of supercooling due to differences of molecular association in the liquid phase.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1972
Accession Number
AD0750941

Entities

People

  • Andrew A. Menna
  • Fritz V. Wald
  • John C. Swartz

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Boundaries
  • Boundary Layer
  • Contracts
  • Cooling
  • Crystal Growth
  • Crystallization
  • Crystals
  • Diagrams
  • Diffusion
  • Materials
  • Optical Modulators
  • Phase
  • Phase Diagrams
  • Single Crystals
  • Temperature Gradients
  • Titanium Oxides

Readers

  • Materials Science and Engineering.
  • Semiconductor Device Technology