Accession Number : AD0667576

Title :   IMPROVED II-VI CRYSTALS.

Descriptive Note : Quarterly progress rept. no. 1, 8 Mar-8 Jun 65,

Corporate Author : CLEVITE CORP CLEVELAND OHIO ELECTRONIC RESEARCH DIV

Personal Author(s) : Shiozawa,L. R. ; Jost,J. M.

Report Date : 04 AUG 1965

Pagination or Media Count : 29

Abstract : Emphasis was placed on the construction of equipment needed for improving and evaluating the quality of CdS and related crystals. A procedure for cleaning fused-quartz tubes used for purification and crystal growth has been developed, which, along with better purification methods, promises to result in improvement in crystal quality. A vacuum apparatus has been assembled for studying the outgassing characteristics of CdS powders during sintering. By proper use of liquid nitrogen traps, pressures below 0.000005 torr were achieved with a small mechanical pump rated at 0.0001 torr ultimate pressure. A new furnace for continuing work on seed growth has been built and a moderately-successful run has been completed. Although considerable reliance is still placed on microscopic observations and electrical measurements for judging crystal quality, measurements of photoconductivity, thermally-stimulated currents, and acoustic phenomena will be emphasized now that the necessary equipment has been completed. (Author)

Descriptors :   (*SEMICONDUCTORS, CRYSTAL GROWTH), (*CADMIUM SULFIDES, PREPARATION), PURIFICATION, SINTERING, DEGASIFICATION, VACUUM APPARATUS, POWDERS, PHOTOCONDUCTIVITY, THERMOELECTRICITY, ACOUSTIC PROPERTIES, EPITAXIAL GROWTH, CRYSTAL DEFECTS

Subject Categories : Electrical and Electronic Equipment
      Crystallography
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE