Accession Number : ADP001516

Title :   Turnover Temperatures for Doubly Rotated Quartz,

Corporate Author : ROME AIR DEVELOPMENT CENTER HANSCOM AFB MASS SOLID STATE SCIENCES DIV

Personal Author(s) : Kahan,Alfred

Report Date : 1982

Pagination or Media Count : 11

Abstract : The turnover temperatures, Tto, of quartz plates vibrating in the thickness mode are calculated for doubly rotated orientations in the temperature range of -200 to +200 degrees C. In addition to the standard cuts of interest situated along the loci of zero values of the first order temperature coefficients of frequency, we find another family of doubly rotated quartz orientations, vibrating in c-mode resonance, with Tto values 70 degrees C and above. The significance of these orientations are that for the same Tto they are considerably less sensitive to crystallography orientation than currently utilized singly or doubly rotated cuts. For Tto = 90 degrees C, the static frequency as a function of temperature coefficients of these orientations are between the AT-cut and BT-cuts, and they become less sensitive to temperature with increasing Tto.

Descriptors :   *Frequency, *Control, *Symposia, *Quartz, *Rotation, Frequency standards, Temperature coefficients, Plates, Vibrational spectra, Crystallography, Spin resonance, Crystals, Resonators

Distribution Statement : APPROVED FOR PUBLIC RELEASE