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Piezoelectric ceramic for element medical ultrasonic probe

Update time：2012-11-01 14:48　　　 Viewed：次

Ultrasonic probe is the typical application of diagnosis and treatment of medical equipment of piezoelectric ceramic.

Piezoelectric ceramic of ultrasonic probe.

Principle of application:

As a kind of electroacoustic transducer, piezoelectric ceramic can convert sound waves or ultrasonic mechanical energy into electrical signals, also can convert electrical signal into sound waves or ultrasound.

The principle of piezoelectric ultrasonic probe is a bit like radar. The piezoelectric ceramic piece issues ultrasonic at one point, met after objects, ultrasonic probe into receiving mode, the reflected ultrasonic wave is transformed into voltage signal. Ultrasonic frequency and the quality of the object being detected changes will lead to probe the change of the output signal. Modern piezoelectric ultrasonic probe is composed of two groups of piezoelectric ceramic piece, at a certain moment in a set of piezoelectric ceramic ultrasonic, and the other group receive ultrasonic piezoelectric ceramic piece.

Fuji medical ceramic piezoelectric material characteristics of Changsha PengXiang:

1	item	unit	symbol	C-84	C-92	C-93	C-94
2	Coupling factors	×10-2	Kp	68.8	68.8	68.3	68.0
3	Coupling factors	×10-2	K31	42.5	40.9	40.2	41.2
4	Coupling factors	×10-2	K33	78.9	76.0	76.8	77.1
5	Coupling factors	×10-2	Kt	54.3	52.0	52.6	51.6
6	Coupling factors	×10-2	K15	76.1	66.0	71.2	69.2
7	Coupling factors	（m*Hz）	Kp	1896	1913	1889	1935
8	Frequency	（m*Hz）	K31	1400	1420	1407	1410
9	Frequency	（m*Hz）	K33	1288	1310	1297	1330
10	Frequency	（m*Hz）	Kt	2004	2017	1970	2036
11	Frequency	（m*Hz）	K15	842	950	869	901
12	Young modulus	×10-12(m2/N)	S11E	16.6	15.7	16.0	15.7
13	Young modulus	×10-12(m2/N)	S12E	-4.9	-4.7	-4.3	-4.9
14	Young modulus	×10-12(m2/N)	S13E	-9.1	-8.4	-8.7	-8.2
15	Young modulus	×10-12(m2/N)	S33E	22.9	21.1	21.6	20.3
16	Young modulus	×10-12(m2/N)	S44E	52.6	38.4	46.6	42.7
17	Young modulus	×10-12(m2/N)	S66E	43.1	40.8	40.5	41.3
18	Piezoelectric charge constants	×10-12(m/V)	d31	-356	-334	-371	-370
19	Piezoelectric charge constants	×10-12(m/V)	d33	774	719	826	786
20	Piezoelectric charge constants	×10-12(m/V)	d15	1146	765	1082	947
21	Dielectric canstants		ε11T/εo	4867	3950	5597	4959
22	Dielectric canstants		ε33T/εo	4758	4802	6053	5771
23	Young modulus	×1010(N/m2)	C11E	13.7	14.1	13.2	14.2
24	Young modulus	×1010(N/m2)	C12E	9.0	9.2	8.3	9.4
25	Young modulus	×1010(N/m2)	C13E	9.1	9.3	8.7	9.5
26	Young modulus	×1010(N/m2)	C33E	11.6	12.2	11.6	12.6
27	Young modulus	×1010(N/m2)	C44E	1.9	2.6	2.1	2.3
28	Young modulus	×1010(N/m2)	C66E	2.3	2.5	2.5	2.4
29	Piezoelectric charge constants	(C/m2)	e31	-10.4	-11.0	-8.4	-12.4
30	Piezoelectric charge constants	(C/m2)	e33	25.5	25.4	31.5	28.6
31	Piezoelectric charge constants	(C/m2)	e15	21.8	19.9	23.2	22.2
32	Dielectric canstants		ε11S/εo	2046	2229	2763	2584
33	Dielectric canstants		ε33S/εo	1689	1915	2409	2196
34	Young modulus	×10-12(m2/N)	S11D	13.6	13.1	13.4	13.1
35	Young modulus	×10-12(m2/N)	S12D	-7.9	-7.3	-6.9	-7.6
36	Young modulus	×10-12(m2/N)	S13D	-2.6	-2.8	-3.0	-2.5
37	Young modulus	×10-12(m2/N)	S33D	8.6	8.9	8.8	8.3
38	Young modulus	×10-12(m2/N)	S44D	22.1	21.7	23.0	22.2
39	Young modulus	×10-12(m2/N)	S66D	43.1	40.8	40.5	41.3
40	Piezoelectric charge constants	×10-3(Vm/N)	g31	-8.4	-7.8	-6.9	-7.2
41	Piezoelectric charge constants	×10-3(Vm/N)	g33	18.4	16.9	15.4	15.4
42	Piezoelectric charge constants	×10-3(Vm/N)	g15	26.6	21.9	21.8	21.6
43	Dielectric canstants	×10-3	β11T×εo	0.21	0.25	0.18	0.20
44	Dielectric canstants	×10-3	β33T×εo	0.21	0.21	0.17	0.17
45	Young modulus	×1010(N/m2)	C11D	14.4	14.8	13.6	15.0
46	Young modulus	×1010(N/m2)	C12D	9.7	9.9	8.6	10.1
47	Young modulus	×1010(N/m2)	C13D	7.3	7.7	7.4	7.7
48	Young modulus	×1010(N/m2)	C33D	16.5	16.7	16.1	17.1
49	Young modulus	×1010(N/m2)	C44D	4.5	4.6	4.3	4.5
50	Young modulus	×1010(N/m2)	C66D	2.3	2.5	2.5	2.4
51	Piezoelectric charge constants	×109(V/m)	h31	-0.7	-0.6	-0.4	-0.6
52	Piezoelectric charge constants	×109(V/m)	h33	1.8	1.6	1.4	1.5
53	Piezoelectric charge constants	×109(V/m)	h15	1.2	1.0	0.9	1.0
54	Dielectric canstants	×10-3	β11S×εo	0.5	0.4	0.4	0.4
55	Dielectric canstants	×10-3	β33S×εo	0.6	0.5	0.4	0.5
56	Poisson's ratio		σE	0.30	0.30	0.27	0.31
57	Mechanical Q		Qm(Kp)	46	28	67	28
58	Dissipation factor	（%）	tanδ	1.97	3.07	1.72	3.12
59	Curie point	（℃）	Tc	186	183	150	171
60	Density	×103(kg/m3)	ρ	7.67	7.90	7.91	7.99

Typical customers
l Philips
l GE
l SIEMENS
l Toshiba
l HITACHI ALOKA
l ESAOTE

(Editor：admin)

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