Zibo Yuhai Electronic Ceramic Co., Ltd.
Address : No.57 Chuangye Road, Development Area Boshan, Zibo City, Shandong Prov. P.R. of China
Tel : +86-0533-4230012
Fax : +86-0533-4231700
Email : sales@zbyuhai.com

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Ultrasonic Vibration Rings-Dental Cleaning Piezo Transducer

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Product Description

Parameters

Piezoelectric ceramic ring

Low aging, Low dielectric loss

Application: high power ultrasonic transducer, dental cleaning machine

Piezoelectric Ceramic Material: PZT-82(equal to PZT-8)

Piezoelectric elements technical data:

Dimensions: out diameter 10mm, inner diamter 5mm, height 2 mm

Radial Frequency Fr: 149KHz ± 3K

Mechanical Coupling coefficient K31 >0.325

Dielectric Loss tg δ: ≤ 0.3%

Static capacitance Cs: 270pF±12.5%

Test Condition: 25±3 °C 40~70% R.H.

fr, Zm, Kr => Radial mode vibration

Cs tanδ => LCR meter at 1KHz 1Vrms

High-frequency oscillation signal is generated by high-frequency oscillation circuit and used in ultrasonic transducer. The inverse piezoelectric effect (or magnetostrictive effect) is used to generate ultrasonic vibration. The working tip is stimulated to produce resonance. The plaque, calculus or bacteria on the periodontal surface are removed by various effects of ultrasound.

PZT-8 series

This material range is used in high power applications, even though its piezoelectric activity level is slightly lower than PZT-4 series types. With an extremely high mechanical quality factor and extremely low loss factor, PZT-8 series materials have the ultimate power handling capability.

High Power “Hard” Piezoelectric Materials are ceramics able to withstand high levels of electrical and mechanical stress and are particularly suited to high voltage and power applications.

Typical value of piezoelectric ceramic materials performance

Typical value of piezoelectric ceramic materials performance
"Hard" PZT materials
Properties			PZT-41	PZT-42	PZT-43	PZT-82	PCrN-4	PBaS-4
Dielectric Constant	ɛTr3		1050	1250	1420	1100	1600	1900

Coupling factor	KP		0.58	0.58	0.58	0.52	0.6	0.59
	K31		0.32	0.33	0.34	0.3	0.35	0.34
	K33		0.66	0.67	0.68	0.57	0.68	0.68
	Kt		0.48	0.48	0.48	0.4	0.45	0.49
Piezoelectric coefficient	d31	10-12m/v	-106	-124	-138	-100	-156	-160
	d33	10-12m/v	260	280	300	240	350	380
	g31	10-3vm/n	-11.4	-11.2	-11	-10.3	-11	-9.5
	g33	10-3vm/n	28	25.3	24	25	24.7	22.6
Frequency coefficients	Np		2280	2200	2160	2280	2100	2200
	N1		1671	1613	1583	1671	1539	1613
	N3		1950	1900	1875	1950	1850	1850
	Nt		2250	2200	2200	2300	2200	2200
Elastic compliance coefficient	Se11	10-12m2/n	11.8	12.7	13.2	11.6	14	13.2
Machanical quality factor	Qm		1000	800	600	1200	400	2200

Dielectric loss factor	Tg δ	%	0.3	0.4	0.5	0.3	0.6	0.5
Density	ρ	g/cm3	7.5	7.5	7.5	7.6	7.5	7.5
Curie Temperature	Tc	°C	320	320	320	310	310	310
Young's modulus	YE11	<109N/m3	85	79	76	86	71	76
Poison Ratio			0.3	0.3	0.3	0.3	0.3	0.33