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PVDF PIEZO film with Cu-Ni
Polyvinylidene fluoride (PVDF) piezoelectric film is a new kind of polymer piezoelectric material which was developed in Japan in the 1970s. So far, only a few advanced countries in the world have produced it. It has unique dielectric effect, piezoelectric effect and thermoelectric effect. Compared with traditional piezoelectric materials, it has the advantages of wide frequency response, large dynamic range, high sensitivity of power-electric conversion, high mechanical strength, easy matching of acoustic impedance, light weight, soft and not brittle, impact resistance, not easily contaminated by water and chemicals, and easy to be made into pieces or tubes of different shapes and areas. It is widely used in mechanics, acoustics, optics, electronics, measurement, infrared, security alarm, medical care, military, traffic, information engineering, office automation, Marine development, geological exploration and other technical fields. It is a new type of energy exchanging material to produce improved pressure dynamic sensor, ultrasonic and intelligent detection.
PVDF piezoelectric film is a new kind of polymer piezoelectric energy exchanging material, which has unique dielectric effect, piezoelectric effect and thermoelectric effect. Compared with the traditional piezoelectric materials such as ceramics with wide frequency response, large dynamic range, power electricity conversion sensitivity is high, the mechanical properties of high strength, acoustic impedance matching characteristics, and have light weight, soft and crispy, impact resistance, not easily affected by the pollution of water and chemicals, easy to be made into any shape the advantages of the area range or tubular. It is widely used in mechanics, acoustics, optics, electronics, measurement, infrared, security alarm, medical care, military, traffic, information engineering, office automation, Marine development, geological exploration and other technical fields.
The standard sizes of cu-Ni PVDF piezoelectric films are 203*280mm and 0.4 m *1.0 m, and the thickness is 28 um, 52 um and 110 um.Sheet size options: 8" x 5.5" and 8" x 11"
The physical properties of the copper plating nickel PVDF piezoelectric film is excellent, with beautiful color, strong abrasion resistance has high chemical stability, excellent oxidation resistance and low moisture absorption, heat stability, high resistance to uv radiation, high impact resistance, fatigue resistance, its chemical stability more than 10 times the ceramic, under 80 ℃ can be use for a long time. PVDF piezoelectric film is soft in texture, light in weight, close to the acoustic impedance of water, good in matching state, and highly sensitive in application. PVDF piezoelectric film in the direction of thickness of the stretching vibration harmonic frequency is very high, can obtain a wide flat response, frequency response width is far better than ordinary piezoelectric ceramic transducer; High capacitance,
PVDF piezoelectric film has the following advantages:
Technical specifications
1. Sensory requirements:
|
Item |
indicators |
|
colour and lustre |
Metallic luster, basically the same |
|
Encapsulation and perforation |
not allow |
|
Scratches, wrinkles |
No obvious scratches and wrinkles are allowed (see the standard sample for the degree of scratches and wrinkles) |
|
Spot |
Visual inspection 300mm away from the film surface, no visible spots |
2. Specifications:
|
Item |
Specification |
Tolerance |
|
Length |
≤280 |
0～15% |
|
Width |
≤203 |
0～15% |
|
Thickness |
0.028 |
±5% |
|
0.052 |
±5% |
|
|
0.11 |
±5% |
|
|
|
Note: The length and width can be adjusted according to user's requirement
PVDFMain technical performance indexes
|
Item |
indicators |
|
piezoelectric constantd33 |
18—32 PC/N |
|
dielectric constantε/ε0 |
9—13 (IKHZ) |
|
sound velocityс |
2000 m/s |
|
electromechanical coupling coefficient к33 |
10—14 % |
|
volume resistivityp |
1013 Ω.cm |
|
Pyroelectric coefficientp |
40 c/cm2.k |
|
detection sensitivity(4HZ) |
1011 m.HZ1/2/W |
|
operating temperatureT |
-40～80℃ |
Application:
PVDF piezoelectric film is widely used, and can be made into a variety of transducers for industrial production, medical industry, daily life and military fields. Please refer to specific application
|
Type |
Properties |
Application |
|
Audio transducer |
The transverse piezoelectric property of PVDF piezoelectric membrane was used |
Microphone, noise-cancelling microphone, telephone transmitter, dual piezoelectric wafer transducer, earphone, speaker, accelerometer, medical sensor |
|
Electromechanical transducers and devices |
The transverse piezoelectric property of PVDF piezoelectric membrane was used |
Phonograph pickup, contactless switch, telephone dial, typewriter and computer keyboard, sphygmomanometer, optical shutter, optical switch, zoom lens, tactile sensor, display, displacement sensor |
|
Ultrasonic and underwater transducer |
Using the longitudinal piezoelectric property of PVDF piezoelectric film, useful signals can be generated within 500MHz at room temperature |
Ultrasonic transmitter and receiver, non-destructive testing transducer, imaging array, hydrophone, delay line, light modulator, variable focus transducer, ultrasonic microscope, ultrasonic diagnostic instrument |
|
Infrared and optical devices |
The thermoelectricity of PVDF piezoelectric film is utilized |
Infrared detector, camera, infrared visible light converter, photocopier, reverse detector, laser power meter, fire detector, burglar alarm |
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