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Polarization system and polarization method of cement-based piezoelectric ceramic composite material

A technology of piezoelectric ceramics and composite materials, which is applied in the manufacture/assembly of piezoelectric/electrostrictive devices, etc., can solve the problem that there is no way to realize the effective polarization of cement-based piezoelectric ceramic composite materials, so as to ensure long-term stability Effect

Active Publication Date: 2013-01-30
SHENZHEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Therefore, the traditional polarization methods have no way to realize the effective polarization of cement-based piezoelectric ceramic composites.

Method used

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  • Polarization system and polarization method of cement-based piezoelectric ceramic composite material
  • Polarization system and polarization method of cement-based piezoelectric ceramic composite material
  • Polarization system and polarization method of cement-based piezoelectric ceramic composite material

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Embodiment 1

[0058] Using the polarization method involved in the present invention, the cement-based piezoelectric ceramic composite material with a thickness of 1mm is polarized, the polarization temperature is 130°C, and the polarization time is from 20min-140min; the polarization voltage adopts (1KV) respectively ,3KV, 5KV, 6.5KV); After the polarization is completed, cool the cement-based piezoelectric ceramic composite material to room temperature, and dry the remaining silicone oil on the surface of the material with lens cleaning paper; test the cement-based piezoelectric ceramic composite with HP4294A precision impedance analyzer Electrical properties of ceramic composites; use electromechanical coupling coefficient (electromechanical coupling coefficient) kt to characterize the degree of polarization. The completion rate of 5 groups of parallel polarization is 100% (5 samples are taken at each test point, which is 1 group; if the average deviation of the electromechanical coupling...

Embodiment 2

[0060] Using the polarization method involved in the present invention, the cement-based piezoelectric ceramic composite material with a thickness of 1mm is polarized, the polarization voltage is 5.5KV, and the polarization time is from 20min-140min; The picture has been added, Figure 4 ); 90°C, 130°C, 160°C); After the polarization is completed, cool the cement-based piezoelectric ceramic composite to room temperature, and use lens-cleaning paper to absorb the remaining silicone oil on the surface of the material; use HP4294A precision impedance analysis The electric performance of the cement-based piezoelectric ceramic composite is tested by the instrument; the electromechanical coupling coefficient (kt) is used to characterize the degree of polarization. The meaning of the electromechanical coupling coefficient (Kt) is: the piezoelectric vibrator converts mechanical energy during the vibration process As electrical energy, or convert electrical energy into mechanical energ...

Embodiment 3

[0062] Using the polarization method involved in the present invention, the cement-based piezoelectric ceramic composite material samples with different thicknesses of 0.8mm-3.2mm are polarized, and the polarization temperature is 130°C; the polarization time is not limited, and the applied Saturation Polarization Voltage Condition. The completion rate of parallel polarization in each group is 100%. For the polarization data, see Figure 5 .

[0063] The present invention is based on the electrical contact polarization method and combines the advantages of the corona discharge polarization method; a DC power supply is used to apply the polarization voltage, and a needle-shaped clamp is used to realize the fixing and polarization process of the cement-based piezoelectric ceramic composite material; Polarization degree and polarization uniformity; the surface of the cement-based piezoelectric ceramic composite material is coated with silver paste to form a flat plate electrode,...

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Abstract

The invention discloses a polarization system and a polarization method of a cement-based piezoelectric ceramic composite material. The polarization system comprises an adjustable high-voltage DC power supply, a voltmeter, a polarization clamp, a heating tank, and a heating device for heating the heating tank, wherein the wiring terminal of the polarization clamp is connected with the output end of the high-voltage DC power supply; the voltmeter is connected with the wiring terminal of the polarization clamp in parallel; and the polarization clamp is soaked in the heating oil in the heating tank. The system and the method provided by the invention effectively overcome the disadvantages of the conventional polarization method, and can ensure the polarization success rate of the cement-based piezoelectric ceramic composite material as well as the long-term stability of the dielectric and piezoelectric properties of the polarized material.

Description

[technical field] [0001] The invention relates to the polarization of piezoelectric ceramics, in particular to a polarization system and a polarization method of a cement-based piezoelectric ceramic composite material. [Background technique] [0002] Cement-based piezoelectric ceramic composite material is a new type of functional material, which can be used as a piezoelectric sensor to realize the long-term real-time monitoring function of the mechanical properties of concrete structures; and the composite material also has good physical / chemical stability of cement-based materials And the outstanding piezoelectric performance of piezoelectric ceramics can effectively solve the compatibility problem between traditional smart materials and concrete matrix structural materials. The cement-based piezoelectric ceramic composite not only has the sensing function, but also has the driving function; its preparation process is simple and the cost is low, which is very suitable for ...

Claims

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Application Information

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IPC IPC(8): H01L41/39
Inventor 董必钦邢锋丁铸龙武剑
Owner SHENZHEN UNIV