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Piezoelectric ceramics ring made of PZT-4 or PZT8 are used widely for ultrasonic cleander, ultrasonic welding, etc.

Dimensions(mm)	CapacityC(pF)	Weak field dissipationTgδ (12v)	Strong field dissipationTgδ (400v)	Radial frequencyFr(KHz)	Resonance impedanceZm()	Thick frequencyFt(KHz)	Coupling modulusKr(%)	Quality factorQm
Φ 30/Φ 10*5	1150± 10%	≤ 0.5%	≤ 1.0%	58.4± 5%	≤ 15	410	≥ 45	≥ 800
Φ 32/Φ 10*5	1320± 10%	≤ 0.5%	≤ 1.0%	56.1± 5%	≤ 15	410	≥ 45	≥ 800
Φ 35/Φ 15*5	1430± 10%	≤ 0.5%	≤ 1.0%	45.5± 5%	≤ 15	410	≥ 45	≥ 800
Φ 38/Φ 15*5	1750± 10%	≤ 0.5%	≤ 1.0%	43.4± 5%	≤ 15	410	≥ 46	≥ 800
Φ 40/Φ 15*5	1970± 10%	≤ 0.5%	≤ 1.0%	42.8± 5%	≤ 15	410	≥ 45	≥ 800
Φ 42/Φ 15*5	2200± 10%	≤ 0.5%	≤ 1.0%	40± 5%	≤ 15	410	≥ 45	≥ 800
Φ 42/Φ 17*5	2110± 10%	≤ 0.5%	≤ 1.0%	38.8± 5%	≤ 15	410	≥ 45	≥ 800
Φ 45/Φ 15*5	2580± 10%	≤ 0.5%	≤ 1.0%	38.1± 5%	≤ 15	410	≥ 46	≥ 800
Φ 50/Φ 17*5	3160± 10%	≤ 0.5%	≤ 1.0%	34.8± 5%	≤ 15	410	≥ 45	≥ 800
Φ 50/Φ 17*6	2430± 10%	≤ 0.5%	≤ 1.0%	34.8± 5%	≤ 15	315	≥ 45	≥ 800
Φ 50*3	5800± 10%	≤ 0.5%	≤ 1.0%	46± 5%	≤ 10	681	≥ 50	≥ 800

 Piezoelectric ceramics ring made of PZT-4 or PZT8 are used widely for ultrasonic cleander, ultrasonic welding, etc.

Piezoelectric ceramic element