ULTRASONIC ATTENUATION AND VELOCITY MEASUREMENTS IN QUARTZ

Abstract

The frequency dependence of the attenuation of compressional waves in X-cut quartz obeys an approximate square law consistant with the dislocation damping theory which predicts a square-law frequency dependence up to a resonant frequency. The behavior of the attenuation as a function of temperature below 100 K is in AGREEMENT WITH THAT PREDICTED BY A PHONONPHONON PROCESS. Above 40 K the thermal conductivity varies approximately as 1/T while the specific heat increases linearly with the temperature between 40 and 150 K. The temperature dependence of the velocity measured in this experiment indicates that it remains constant at a value of 5.75 X 10 to the 6th power cm/sec to within + or - 0.02%. In the region where the attenuation is rapidly changing there is apparently no associated velocity change.

Document Details

Document Type
Technical Report
Publication Date
May 04, 1961
Accession Number
AD0257086

Entities

People

  • Rohn Truell
  • Thomas Fitzgerald

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Agreements
  • Attenuation
  • Conductivity
  • Dislocations
  • Frequency
  • Measurement
  • Physical Properties
  • Resonant Frequency
  • Specific Heat
  • Thermal Conductivity
  • Thermophysical Properties

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Materials Science and Engineering.
  • Thermal Physics or Thermal Science.