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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NDT Piezoelectric ceramic tube 48KHz

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Product Description

Parameters

Piezo Tube outer diameter 20.5mm, length 25mm, wall thickness 1.5mm

Radial mode vibration
Material: PZT-52(modified P5A)
Frequency: 48KHz±2KHz
ΔF： 450Hz
Electromechanical coupling coefficient Kr>0.3
Static capacitance Cs: 22nF±15%

Test Condition: 23±3 °C 40~70% R.H.

Applications: NDT Non destructive Testing

Non-destructive testing (NDT) is a testing method to inspect the surface and internal quality of the inspected parts without damaging the working state of the workpiece or raw materials.

There are many kinds of ultrasonic flaw detectors, but in the actual flaw detection process, pulse reflection ultrasonic flaw detectors are most widely used. Generally, in homogeneous materials, the existence of defects will cause the discontinuity of materials, which often results in the inconsistency of acoustic impedance. From the reflection theorem, we know that ultrasound will reflect at the interface of two media with different acoustic impedance. The magnitude of the reflected energy is related to the difference of acoustic impedance of the media on both sides of the interface and the orientation and size of the interface.

SOFT PZT suitable for NDT detector.

Typical value of piezoelectric ceramic materials performance
"Soft" PZT materials
Properties			PZT-51	PZT-52	PZT-53	PZT-5H	PLiS-51	PMgN-51	PSnN-5
Dielectric Constant	ɛTr3		2200	2400	2600	3200	2000	3800	1600

Coupling factor	KP		0.62	0.63	0.64	0.68	0.62	0.64	0.6
	K31		0.35	0.35	0.36	0.38	0.35	0.35	0.35
	K33		0.68	0.7	0.7	0.76	0.7	0.7	0.68
	Kt		0.5	0.5	0.5	0.52	0.52	0.52	0.5
Piezoelectric coefficient	d31	10-12m/v	-186	-204	-227	-275	-197	-270	-170
	d33	10-12m/v	500	520	550	620	450	600	400
	g31	10-3vm/n	-9.6	-9.8	-9.9	-9.7	-11.1	-8	-12
	g33	10-3vm/n	25.6	24.5	23.9	22	25.4	18	28
Frequency coefficients	Np		1980	1980	1960	1900	1920	1980	2000
	N1		1451	1451	1437	1393	1407	1451	1466
	N3		1900	1900	1755	1550	1925	1800	1825
	Nt		2150	2150	2150	2100	2100	2100	2100
Elastic compliance coefficient	Se11	10-12m2/n	16.7	17	17.4	18	18	18	16.6
Machanical quality factor	Qm		80	75	75	70	80	70	85

Dielectric loss factor	Tg δ	%	2	2	2	2	2	1.8	2
Density	ρ	g/cm3	7.6	7.6	7.6	7.5	7.5	7.6	7.5
Curie Temperature	Tc	°C	270	270	270	230	345	270	350
Young's modulus	YE11	<109N/m3	60	59	57.5	56	56	56	60
Poison Ratio			0.36	0.36	0.36	0.36	0.36	0.36	0.36