Stock Pzt Ceramic Hemisphere Piezocramic Bowl for Acoustic Modem
China Stock Pzt Ceramic Hemisphere Piezocramic Bowl for Acoustic Modem, Find details about China Piezo Ceramic Hemisphere, Piezo Ceramic Bowl from Stock Pzt Ceramic Hemisphere Piezocramic Bowl for Acoustic Modem
Stock Pzt Ceramic Hemisphere Piezocramic Bowl for Acoustic Modem
WuHan Piezohannas Tech.Co .,Ltd is a manufactuer of piezoelectric ceramics ,ultrasonic transducers and some other components with strong technology force.With a quality management system and research & development sector,our products are extensively used in most applications.
Dimension of piezo hemisphere:
Dimensions: outer diameter 15 mm, wall thickness 0.8mm
Fs(Hz): 148736
Fp(Hz) :174400
Static capacitance Cs: 4830
Acoustic Modem Application:
An acoustic modem is used to transmit data underwater, much as telephone modems are used to transmit data over phone lines. An acoustic modem converts digital data into special underwater sound signals. These signals are then received by a second acoustic modem and converted back into digital data. Acoustic modems can be used for underwater telemetry, ROV and AUV command and control, diver communications, underwater monitoring and data logging, and other applications requiring underwater wireless communications.
A transducer that converts sound signals into electrical signals is used to receive sound signals in water. It is called areceiving transducer, also known as a hydrophone. Hydrophone is widely used in underwater communication, continental exploration, target location, tracking and so on. It is an important component of sonar. Underwater detection, identification, communication, marine environmental monitoring side and marine resources development are inseparable from underwater acoustic transducer.
Some Stanard Size of Spherical and Hemispherical Piezoelectric Ceramic:
Diameter: 5 - 40mm
Wall thickness: 0.5 - 3mm
Caliber: 5 - 8mm
Maximum radius: approx. 50 mm
Typical value of "Soft" PZT materials performance:
Abbreviation | Definition | Unit |
ε33 T , ε 11 T | Free Relative Dielectric Constant | |
ε33 S , ε 11 S | Clamping Relative Dielectric Constant | |
tgδ | Dissipation Factor at Low Field | |
ρ | Density | g/cm 3 |
T c | Curie Point | ºC |
V | Velocity | m/s |
Z a | Accoustic Impedance | Mrayl |
K p, K 33, K t, K 31, K 15 | Electromechanical Coupling Factors | |
N p , N 33, N 31, N 15, N t, N c | Frequency Constants | Hz - m |
d 33, d 31, d 15 | Piezoelectric Strain Constants | 10 -12 C/N |
d h | Hydrostatic Piezoelectric Strain Constants | 10 -3 Vm/N |
Q pm | Mechanical Quality Factor at Planar mode | |
Y 11 E , Y 33 E | Young's Modulus under Short Circuit | 10 10 N/m 2 |
σ | Poisson Ratio | |
ε33 T (% Per Decade) | Aging Rate of Free Relative Dielectric Constant | |
K p (% Per Decade) | Aging Rate of Planar Electromechanical Coupling Factor | |
K t (% Per Decade) | Aging Rate of Coupling Factor at Thickness mode | |
N p (% Per Decade) | Aging Rate of Frequency Constant of Planar Mode | |
N t (% Per Decade) | Aging Rate of Frequency Constant at Thickness Mode | |
ε33 T ( / o C) | Thermal Stability of Free Relative Dielectric Constant | |
GLOSSARY | ||
BT | Barium Titanate | |
Hard PZT | Hard Lead Titanate Zirconate Compound | |
Soft PZT | Soft Lead Titanate Zirconate Compound |
Nominal Sizes and Tolerances:
Geometry | Size (mm) | Tolerance |
Discs | Diameter: 3 to 200 |
Tolerance according to the piezoelectric elements Industrial standard. |
Thickness: 0.2-25 | ||
Tubes | Length: 1-100 | |
OD: 6-180 | ||
ID: 5-150 | ||
Wall: 0.5-15 | ||
Plates | Length: 1-200 | |
Width: 1-200 | ||
Thickness: 0.2-25 | ||
Sphere | OD: 6-160 | |
ID: 4-150 | ||
Wall: 1-10 | ||
Rings | OD: 3-180 | |
ID: 1-150 | ||
Thickness : 0.2-25 | ||
For All Sizes | Flatness | ± 0.03 |
Concentricity | ± 0.10 | |
Perpendicularity | ± 0.10 | |
Parallelism | ± 0.05 |
Nominal Electric Tolerances:
Piezoelectric Properties | ± 5% |
Relative Dielectric Constant | ± 15% |
STANDARD MECHANICAL TOLERANCES:
Outside Diameter ±0.150mm
Inside Diameter ±0.150mm
Thickness ±0.05mm
Flatness 0.002**/0.012mm MAX
Parallelism 0.007**/0.012mm MAX
Concentricity 0.2mm
Applications of Piezoelectric Ceramics
ultrasonic flow meters | hydrophones | accelerometers |
piezo transducer vibration | atomizer transducer | matter dispersion |
impact-type gas ignitors | precise movement control | pressure sensors |
accelerometers | impact-type gas ignitors | precise movement control |
microphones | musical pick-ups | diagnostic medical ultrasound |
sound making | level sensors | ultrasonic atomizers |
sonar transducer | ultrasonic micro-bonding apparatus | wall thickness sensor |
underwater echo sounders | high frequency transducers | high stress pressure ensors |
squeeze-type gas | ignitors high power actuators | vibratory motors |
transformers | ultrasonic welding | ultrasonic surgery |
material stress sensor | piezo electricity harvesting | biomedical probe |
piezo electricity harvesting | fish finder transducer | compression sensor |
piezo expansion sensor | beauty transducer | Ultrasonic mixing |
calculators, | telephones | car alarm sensor |
embryo monitor | heart reflectoscope reflector | pedometer |
ultrasonic medical | ultrasonic cleaning | sonochemistry |
Application Image:
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