China Pzt Ceramic Spheres Piezoceramic Spheres for Underwater Communications, Find details about China Piezo Ceramic Hemisphere, Piezo Ceramic Bowl from Pzt Ceramic Spheres Piezoceramic Spheres for Underwater Communications
Dimension of Piezo Ceramic Sphere:
Spherical PZT piezo sphere:
Material :PZT5A
10 mm OD
1 mm wall thickness
Capacitance 5000pF
Tg:2%
fr:160Khz
Kp:33%
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 |