Accession Number : AD0784806

Title :   Investigations to Improve the Growth of Quality Verneuil and Chalcogenide Crystals.

Descriptive Note : Final rept. 18 Feb 70-30 Jun 73,

Corporate Author : RHODE ISLAND UNIV KINGSTON DIV OF ENGINEERING RESEARCH AND DEVELOPMENT

Personal Author(s) : Gielisse,Peter J. ; Mitra,Shashanka S.

Report Date : JUL 1973

Pagination or Media Count : 207

Abstract : This final technical report deals with the synthesis and characterization of a variety of materials specifically cubic boronphosphide, cubic boron nitride, diamond, sapphire, and ruby, europium sulfide and the chalcogenides of cadmium. Characterization has been in terms of spectra, electrical conductivity, thermal neutron detection, morphology and thermal stability. A mathematical and thermodynamic model of the flame fusion crystal growth process has been developed. Polymorphism has been fundamentally reviewed, yielding a relationship which gives transition pressures in terms of traditional thermodynamic quantities. Further fundamental and spectral studies deal with solid solution hardening, compressibility and cold neutron spectra of solids.

Descriptors :   *Scientific research, *Crystal growth, *Solid state physics, Boron nitrides, Boron compounds, Boron oxides, Chalcogens, Europium compounds, Sulfides, Phosphides, Diamonds, Radiation effects, Laser materials, Neutron detectors, Doping, Metals, Compression, Polymorphism, Cadmium sulfides, Cadmium selenides, Cadmium tellurides, Raman spectra, Ruby, Electrical conductivity

Subject Categories : Crystallography
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE