Piezo Ceramic Plate Piezoceramic Disc Piezoelectric Transducer Accessories Piezo Element

When an audio voltage is applied to a piezoelectric ceramic sheet, mechanical vibration and sound can be generated; On the contrary, when the piezoelectric ceramic sheet is subjected to mechanical vibration (or pressure), a certain amount of charge q is generated on the sheet, and a voltage signal can be output from …

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Piezo Ceramic Plate Piezoceramic Disc Piezoelectric Transducer Accessories Piezo Element

At present, the common germanium lead titanate piezoelectric ceramic sheet (PZT) is prepared from zirconium, titanium and lead oxides and then sintered. Since the human ear is sensitive to sound * with a frequency of about 3 kilohertz, the resonance frequency f0 of the piezoelectric ceramic sheet is usually designed at about 3 kilohertz. Considering that it is difficult to meet the frequency requirements with only one piezoelectric ceramic sheet at low frequency, the double diaphragm structure is generally adopted. It is composed of a piezoelectric ceramic plate with a diameter of D and a metal vibrating plate with a diameter of D. D is generally 15 to 40 mm, and the total thickness of the composite vibrating plate is h.

When the piezoelectric material is timed, the resonance frequency is proportional to h and inversely proportional to (D/2) 2. The resonance frequency fo is exponentially related to the diameter D of the composite vibrating plate. Obviously, the larger D, the better the low-frequency characteristics. When the piezoelectric ceramic sheet is used as a microphone, the working frequency is about 300hz-5khz. The resistance Z of the piezoelectric ceramic sheet depends on the ratio of D/D, and the resistance decreases with the increase of the ratio of D/D.

spec	Dimension (mm)	Radial frequency (KHz)	Capacitance (pf)	Dielectric dissipation factor tanδ(%)	Electromechanical coupling coefficient (Kr)	Impedance Zr(Ω)	Thickness frequency (KHz)
PU-PC25103	Φ25×Φ10×3	66.4	1240±12.5%	≤0.3	≥0.46	≤15	683±5%
PU-PC225104	Φ25×Φ10×4	66.4	930±12.5%	≤0.3	≥0.46	≤15	512±5%
PU-PC40155	Φ40×Φ12×5	45.9	2070±12.5%	≤0.3	≥0.46	≤15	410±5%
PU-PC40155	Φ40×Φ15×5	42.2	1960±12.5%	≤0.3	≥0.46	≤15	323±5%
PU-PC40176	Φ40×Φ17×6	40.5	1555±12.5%	≤0.3	≥0.46	≤15	341±5%
PU-PC40205	Φ40×Φ20×5	37.9	1700±12.5%	≤0.3	≥0.47	≤15	410±5%
PU-PC50206	Φ50×Φ20×6	33.2	2490±12.5%	≤0.3	≥0.46	≤15	341±5%
PU-PC501765	Φ50×Φ17×6.5	34.8	2430±12.5%	≤0.3	≥0.46	≤15	315±5%
PU-PC50236	Φ50×Φ23×6	31.2	2340±12.5%	≤0.3	≥0.47	≤15	341±5%
PU-PC50276	Φ50×Φ27×6	29.3	2100±12.5%	≤0.3	≥0.47	≤15	341±5%
PU-PC603010	Φ60×Φ30×10	25.3	1922±12.5%	≤0.3	≥0.47	≤18	205±5%