Piezoelectric crystals are widely used for acoustic wave resonators ofdifferent functioning modes and types including BAW and SAW. It is well-knownthat only some special orientations of crystals will exhibit desirableproperties such as mode couplings, thermal sensitivity, accelerationsensitivity, and others that are important in design and applications ofresonators. With extensive studies on physical properties in last decades andincreasing industrial needs of novel products, it is necessary to comb theknown knowledge of quartz crystal material for novel orientations and betterproducts as agendas in the industry. With known material properties likeelastic, piezoelectric, dielectric, and thermal constants, we can establish therelationships between vibrations and bias fields such as temperature to ensurea resonator immunizing from excessive response to changes causing significantdegradation of resonator properties and performances. Since the theoreticalframework of wave propagation in piezoelectric solids is known, we need to usethe existing data and results for the validation of current orientations inactual products. The agreement will give us needed confidence of the theory andanalytical procedures. Through rotations, we calculated physical properties asfunctions of angles and bias fields, enabling the calculation of resonatorproperties for the identification of optimal cuts. Such a procedure can also beapplied to similar crystals for a careful examination of possible orientationsto maximize the potential use of materials in acoustic wave resonators.
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