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Lead Free Piezoelectric Elements

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The Co-Al Co-doped Barium Titanate Lead-free Piezoelectric Ceramics was successfully developed by Yuhai company through repeated experiments. By Researching the influence of Co-Al Co-doping on the structure and properties of Barium Titanate-based piezoelectric ceramics, the formulation and preparation technology of Barium Titanate-based piezoelectric ceramics were optimized. Yuhai`s BaTiO3 was prepared by conventional solid-phase sintering method, with the piezoelectric constant d33 (>170pC/N), dielectric loss tgδ≤0.5% and mechanical coupling coefficient Kp0.34.

Barium titanate lead-free piezoelectric ceramics are important basic materials for the development of modern science and technology, which was widely used in the manufacture of ultrasonic transducers, underwater acoustic transducers, electroacoustic transducers, ceramic filters, ceramic transformers, ceramic frequency discriminators, high voltage generators, infrared detectors, surface acoustic wave devices, electro-optic devices, ignition and detonation devices, and piezoelectric gyroscope and so on.

Application: military, ocean, fishery, scientific research, mine detection, daily life and other fields.

China Patent of Yuhai company`s BaTiO3

Chinese Patent No.: ZL 2011 1 0126758.6

Name: Lead-free Barium Titanate Piezoelectric Material with Addition of Cobalt and Aluminum

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Lead free piezo material BaTiO3

Lead-free Material

Properties

BaTiO3

Dielectric Constant

ɛTr3

1260

Coupling factor

KP

0.34

K31

0.196

K33

0.43

Kt

0.32

Piezoelectric coefficient

d31

10-12m/v

-60

d33

10-12m/v

160

g31

10-3vm/n

-5.4

g33

10-3vm/n

14.3

Frequency coefficients

Np

3180

N1

2280

N3

Nt

2675

Elastic compliance coefficient

Se11

10-12m2/n

8.4

Machanical quality factor

Qm

1200

Dielectric loss factor

Tg δ

%

0.5

Density

ρ

g/cm3

5.6

Curie Temperature

Tc

°C

115

Young's modulus

YE11

<109N/m3

119

Poison Ratio

0.33


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Sun Zhaohai

Mr. Sun Zhaohai

Email:

ceo@zbyuhai.com

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Tel:0086-533-4230012

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Email:ceo@zbyuhai.com

Address:No.57 Chuangye Road, Boshan Economic Development Area, Zibo, Shandong

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