Piezoelectricity: An Introduction to the Theory and Applications of Electromechanical Phenomena in Crystals by Walter Guyton Cady

Author:Walter Guyton Cady
Language: eng
Format: epub
Publisher: Courier Publishing
Published: 2018-12-15T16:00:00+00:00

where γ1 and γ2 are direction cosines for the Z'-axis. In terms of azimuth φ and colatitude θ of the Z'-axis, as defined in §51, this equation may be written thus:

Similarly, from Eq. (194) or (198),

For this class hardly any general transformation formulas for the piezoelectric constants, applicable to axes in all orientations, are available. In a recent paper Mason and Sykes343 give the equation for for any axial system, the axial directions being specified in terms of the angles φ, θ, and ψ according to §52:

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