Bolt-fastening Type Transducers-Piezo Ceramic Rings /Discs-Transducers and Sensors-Products-Zhejiang Jiakang Electronics Co., Ltd.

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Piezo Ceramic Rings /Discs

Ultrasonic Flow Transducers
- Ultrasonic Gas Flow Transducers
- Ultrasonic Liquid Flow Transducers
Piezo Ceramic Rings /Discs
Piezoelectric Actuators
- Piezo Bimorphs
- Piezo Ceramic Sheets
Ultrasonic Humidifier
- Ultrasonic Humidifier Components
Others

Series : Piezo Disc/Actuator

Applications：ultrasonic cleaning,welding and ultrasonic atomization

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Detail Introduction

Components Used in Screw Fastener Sensors

The piezoelectric components is fastened to the metal rod with bolts, which enable the particle displacement or velocity of the mechanical vibration of the piezoelectric components to be amplified, and the ultrasonic energy is concentrated on the smaller area, that is, the ultrasonic concentrator. We can provide a variety of ring-shaped components with low resonant impedance, low dielectric loss, good thermal stability, and high power drive.

Main Parameters

Part Number	HTCH
External Diameter	φ10～φ70(φ10、φ20、φ35,φ50）mm
internal Diameter	φ5～φ35(φ5、φ8、φ15、φ17)mm
Thickness	2.5、3.0、4.0、5.5mm
Electromechanical Coupling Coefficient(Kp)	0.65
Resonant Impedance	≤50Ω
Resonant Frequency	30～200kHz
Recommended Material	P-669、P-679

Electrical Data	Symbol	Main Materials
Electrical Data	Symbol	P-659	P-660	P-663	P-664	P-666	P-667	P-668	P-669	P-672	P-673	P-676	P-678	P-679	P-690
Piezoelectric coupling coefficien	k_p	0.58	0.70	0.67	0.67	0.78	0.10	0.68	0.62	0.70	0.68	0.7	0.72	0.65	0.74
	k₃₁	0.32	0.39	0.38	0.37	0.42		0.39	0.35	0.41	0.39	0.45	0.42	0.38	0.40
	k₃₃	0.60	0.73	0.70	0.70	0.78		0.70	0.68	0.72	0.70	0.80	0.72	0.70	0.75
	k_t	0.42	0.46	0.45	0.45	0.50	0.45	0.46	0.44	0.46	0.46	0.50	0.47	0.46	0.48
Relative dielectric constant	ε^T₃₃/ ε₀	1100	3200	2200	2800	4500	180	2300	1400	3400	2200	6000	2750	1600	3800
Piezoelectric charge constant	d₃₃×10^-12C/N	280	700	400	480	780	70	430	250	600	430	850	540	320	710
Piezoelectric charge constant	d₃₁×10^-12C/N	-120	-350		-200	-350		-230	-130	-280	-230	-420	-260	-150	-360
Mechanical quality factor	Q_m	100	60	80	500	60	2500	90	1000	80	90	60	80	1000	70
Frequency constant	f_r·d kH_z·cm	230	190	200	220	180		200	230	190	200	180	190	230	190
Frequency constant	f_r·t kH_z·cm	210	200	200				225	200		225			200	200
Temperature characteristics	\| TKf_r\| (-20℃~80℃) ×10^-6 / ℃	100	260	300	120	400	30	150	100	300	100	400	200	100	260
Temperature characteristics	\| TKC^T\| (-20℃~80℃) ×10^-6 / ℃	1500	4500	5000	2500	6000		1800	1500	4000	2000	6000	3000	1500	4000
Curie temperature	T_c	320	220	220	230	180	450	355	340	230	325	140	280	330	210
Dielectric loss	tgδ（%）	1.20	1.80	2.00	0.50	2.60	0.70	2.00	0.30	2.30	2.00	2.60	1.50	0.40	1.80
Dielectric loss	tgδ（400V/mm，%）								1.00					1.00