Date of Award
Doctor of Philosophy
Physics and Astronomy
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.
Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/
Erwin William Kammer
Kammer, Erwin William, "A determination of the elastic constants of beta quartz " (1942). Retrospective Theses and Dissertations. 12955.