Temperature properties of plate modes in quartz

The shear horizontal modes that occur in a quartz plate are studied both theoretically and experimentally. These modes are shown to possess a wide variety of temperature properties, including the characteristic behavior of the temperature coefficient of delay, which can take on negative, zero and record-breaking high positive values up to 350 × 10-6/°C. The dependence of this coefficient on the mode number is explained by the varying partial contributions of three elastic moduli, c12, c14, and c44, to this coefficient

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