Accession Number : AD0628793

Title :   TEMPERATURE DEPENDENCE OF THE INFRARED SPECTRA OF SELECTED DIELECTRICS II.

Descriptive Note : Final rept. Jan-Nov 65,

Corporate Author : LITTLE (ARTHUR D) INC CAMBRIDGE MASS

Personal Author(s) : Clark,O. M.

Report Date : 30 NOV 1965

Pagination or Media Count : 26

Abstract : The damping constant as a function of temperature was compared with theoretical equation and showed agreement at high temperature but deviated from the equation at low temperature. A dispersion analysis for LiF and MgO was performed. The calculations show that in order to have a satisfactory fit between the experimental and calculated value of reflectivity one must assume that the high frequency dielectric constant is a function of temperature. The infrared spectra of alpha-quartz was measured as a function of temperature with polarized light. It was observed that the infrared bands shift to longer wave length as the lattice expands. (Author)

Descriptors :   (*DIELECTRICS, INFRARED SPECTRA), TEMPERATURE, LITHIUM COMPOUNDS, FLUORIDES, MAGNESIUM COMPOUNDS, OXIDES, CRYSTALS, QUARTZ, DIELECTRIC PROPERTIES, REFLECTION, MEASUREMENT

Subject Categories : Crystallography
      Atomic and Molecular Physics and Spectroscopy
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE