Degree Type

Dissertation

Date of Award

1942

Degree Name

Doctor of Philosophy

Department

Physics and Astronomy

Abstract

It has been confirmed in previous researches in this laboratory that beta-quartz is piezoelectric. This property suggests the feasibility of measuring the dynamic elastic constants for this substance utilizing the piezoelectric effect as a means for setting up vibrations. A method of measuring frequencies of vibration for parallelopipeds of beta-quarts is described. The technique involves driving the plates with a frequency modulated carrier and detecting beat notes which are amplified and placed on an oscilloscope screen for ease of observation. High order harmonics of the resonances are measured under conditions which permit the plates to be treated as having essentially infinite lateral dimensions. Characteristic values are computed and sufficient number of determinantal equations derived to completely resolve the five elastic constants for beta-quartz as a simultaneous solution. The values of these constants are listed in Table X which also contains all the known results of other experimenters for comparison.

DOI

https://doi.org/10.31274/rtd-180813-14218

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/

Copyright Owner

Erwin William Kammer

Language

en

Proquest ID

AAIDP12017

File Format

application/pdf

File Size

48 pages

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