Accession Number : AD0824452

Title :   RUBIES FOR TEMPERATURE STANDARDS.

Descriptive Note : Final rept. Oct 66-Jul 67,

Corporate Author : LEXINGTON LABS INC CAMBRIDGE MA

Personal Author(s) : Folweiler, Robert C.

Report Date : NOV 1967

Pagination or Media Count : 31

Abstract : Substantial improvements in both crystal size and process control were developed during this contract. A particularly large (297 grams) sapphire crystal was grown in 55 hours. The crystal had a uniform growth approximately 10 inches long, with a diamond cross section 1.3 inches by 0.6 inches along the diagonals. Increased understanding of the effects of velocity and supersaturation control by the use of additional reaction products, plus a major redesign of the furnace assembly led to the observed improvements. Areas of continuing difficulty largely center around the defects found in available seed material. (Author)

Descriptors :   *CRYSTAL GROWTH), (*SAPPHIRE, (*TEMPERATURE, STANDARDS), CRYSTAL DEFECTS, ALUMINUM COMPOUNDS, OXIDES, CORUNDUM, SINGLE CRYSTALS, VAPOR PLATING.

Subject Categories : Crystallography
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE