Pressure and Temperature Studies of Glass Properties Related to Vibrational Spectra.

Abstract

Infrared absorption spectra of five lithium silicate and six potassium silicate glasses of varying composition (20 to 25 mole % Li2O, and 15 to 40 mole % K2O, respectively) are examined in the range 1500 to 100/cm. The frequencies of the main absorption bands decrease with an increase of alkalimetal oxide (M2O) content, with the exception of the about 960/cm shoulder for the lithium silicate glasses. The pressure dependences to about 40 kbar, of all the main infrared absorption frequencies, which are pressure-sensitive, are found to be positive. The effects of pressure were found to be opposite to the compositional effects. Gruneisen mode gammas evaluated from the pressure dependence of the infrared absorption frequencies are apparently related to the polarizing power of the alkalimetal ion. The results are discussed in light of previous high-pressure infrared absorption studies of fused silica and sodium silicate glasses. (Modified author abstract)

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1973
Accession Number
AD0764891

Entities

People

  • Murli H. Manghnani

Tags

DTIC Thesaurus Topics

  • Absorption
  • Absorption Spectra
  • Abstracts
  • Diffraction
  • Frequency
  • High Pressure
  • Optical Materials
  • Potassium
  • Shoulder
  • Silicates
  • Sorption
  • Spectra
  • Vibrational Spectra
  • Wave Phenomena

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Plasma Physics.
  • Spectroscopy.