Accession Number : AD0257086

Title :   ULTRASONIC ATTENUATION AND VELOCITY MEASUREMENTS IN QUARTZ

Corporate Author : METAL HYDRIDES INC BEVERLY MASS

Personal Author(s) : FITZGERALD,THOMAS ; TRUELL,ROHN

Report Date : 04 MAY 1961

Pagination or Media Count : 1

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.

Descriptors :   *QUARTZ, *SOUND TRANSMISSION, *ULTRASONIC RADIATION, ABSORPTION, ATTENUATION, CRYSTAL LATTICES, CRYSTALS, DAMPING, FREQUENCY, HEAT TRANSFER, MEASUREMENT, PHONONS, SOLID STATE PHYSICS, SOLIDS, SOUND, TEMPERATURE, THEORY, VELOCITY, VIBRATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE