By Topic

High-Frequency Vibrations of Plates Made from Isometric and Tetragonal Crystals

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Gerber, E.A. ; Signal Corps Engineering Laboratories, Fort Monmouth, N.J.

The paper deals with thin piezoelectric plates made from the isometric crystals, sodium chlorate and sodium bromate, and the tetragonal crystals, potassium dihydrogen phosphate and ammonium dihydrogen phosphate. Bevelling of crystals is first described, briefly, as a method used for preparing single response crystal units. In the following section the paper discusses the possibilities of getting thickness controlled resonances. The two cuts (zxw) 45° and (zxtw) 45°/54° 44′ (notation according to the 1949 Standards of The Institute of Radio Engineers) give the strongest deformations. The measured frequency constants of numerous round bevelled blanks and their temperature coefficients agree in most cases with the values obtained from calculations based on data from other authors. The resistance, inductance, and quality factor of the equivalent electric circuits are measured. The concordance with calculated values is fairly good if the ratio crystal area/(electrode area) is introduced into the formulas. The NaBrO3thickness modes have about the same quality factor as that of quartz, the quality factor of NH4H2PO4is about one order of magnitude smaller.

Published in:

Proceedings of the IRE  (Volume:38 ,  Issue: 9 )