Quartz crystal units with bar piezoelements vibrating in double-shear mode
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- Author(s): M.E. Bogoush and P.G. Pozdnyakov Source: 10th International Conference on European Frequency and Time, 1996 page ()
- Conference: 10th International Conference on European Frequency and Time
- DOI: 10.1049/cp:19960028
- ISBN: 0 85296 661 X
- Location: Brighton, UK
- Conference date: 5-7 March 1996
- Format: PDF
Summary form only given. Investigations aimed at improving crystal unit characteristics over the range 400-1000 kHz resulted in designing quartz crystals operating in a double-shear mode. The investigations were realized on the base of quartz crystal bars having a rectangular cross section of close cross sizes, with length being along X-axis. Vibrations of such bars may be approximately interpreted as a superposition of two shears-in thickness and in width of the piezoelements. Crystal units operating in the above mentioned mode have high electrophysical parameters: dynamic resistance 5-100 Ohm, motional inductance 2-20 H, quality factor 105-2×106, capacitance ratio up to 350, high temperature-frequency stability and low aging. Calculation results showed that quartz crystal units may have high temperature stability by changing the cut angle and dimensions of the piezoelements.
Inspec keywords: vibrations; frequency stability; crystal resonators
Subjects: Piezoelectric and ferroelectric devices
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