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Temperature stabilized piezoelectric composite ceramic vibrator

A piezoelectric ceramic and piezoelectric composite technology, applied in piezoelectric devices/electrostrictive devices, piezoelectric/electrostrictive/magnetostrictive devices, circuits, etc. It is easy to deform and crack, and the production cost is high, so as to reduce the production cost, improve the piezoelectric performance and reliability, and improve the temperature coefficient.

Active Publication Date: 2016-08-03
欧明 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this technical solution, since the thickness of the dielectric ceramic sheet is required to be relatively thin, only 0.01~0.1mm, it is difficult for the mass production process, and the medium is easily deformed and cracked during sintering, and the defective rate is high, resulting in production higher cost

Method used

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  • Temperature stabilized piezoelectric composite ceramic vibrator
  • Temperature stabilized piezoelectric composite ceramic vibrator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The temperature change rate of piezoelectric ceramics at -30°C is -34%, and the rate of change of capacity temperature at +85°C is +22%; The rate of change in capacity temperature at +85°C is -23%, the thickness of the dielectric ceramic is 0.2mm, the piezoelectric ceramic is a single-layer ceramic, and the dielectric ceramic is composed of a single-layer ceramic capacitor. The first and second electrodes The layers are all silver electrodes with a thickness of 5 microns, and are made into temperature-stabilized piezoelectric composite ceramic vibrators as required.

Embodiment 2

[0041] The temperature change rate of piezoelectric ceramics at -30°C is -15%, and the change rate of capacity temperature at +85°C is +35%; The rate of change in capacity temperature at +85°C is -65%, the thickness of the dielectric ceramic is 0.1mm, the piezoelectric ceramic is a single-layer ceramic, and the dielectric ceramic is composed of a multilayer ceramic capacitor. The first and second electrodes The layers are all silver / palladium electrodes with a thickness of 20 microns, and are made into temperature-stabilized piezoelectric composite ceramic vibrators as required.

Embodiment 3

[0043] The temperature change rate of piezoelectric ceramics at -30°C is -35%, and the rate of change of capacity temperature at +85°C is +25%; The rate of change in capacity temperature at +85°C is -10%, the thickness of the dielectric ceramic is 0.6, mm, the piezoelectric ceramic is a single-layer ceramic, the dielectric ceramic is composed of a multi-layer ceramic capacitor, and the first electrode layer is Silver / palladium electrode, the second electrode layer is a silver electrode, the thickness is 10 microns, and the temperature-stabilized piezoelectric composite ceramic vibrator is made as required.

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Abstract

The invention provides a temperature stabilized piezoelectric composite ceramic vibrator. The temperature stabilized piezoelectric composite ceramic vibrator comprises piezoelectric ceramic, dielectric ceramic, a first lead-out end and a second lead-out end. A first electrode layer is formed on the surface of the two ends of the piezoelectric ceramic. A second electrode layer is formed on the surface of the two ends of the dielectric ceramic. The first lead-out end is closely contacted with the first electrode layer and the second electrode layer of the same side of the piezoelectric ceramic and the dielectric ceramic. The second lead-out end is closely contacted with the first electrode layer and the second electrode layer of the other same side of the piezoelectric ceramic and the dielectric ceramic. Temperature coefficient of capacitance is within -35% at temperature of -30 DEG C, the temperature coefficient of capacitance is within +35% at temperature of 85 DEG C, and the temperature coefficient of capacitance of the piezoelectric ceramic increases along with rising of temperature. The temperature coefficient of capacitance of the dielectric ceramic is within +65% at temperature of -30 DEG C, the temperature coefficient of capacitance is within -55% at temperature of 85 DEG C, and the temperature coefficient of capacitance of the dielectric ceramic decreases along with rising of temperature.

Description

technical field [0001] The invention relates to the field of piezoelectric ceramics, in particular to a temperature-stabilized piezoelectric composite ceramic vibrator, in particular to a piezoelectric ceramic vibrator used for a reversing radar probe. Background technique [0002] Since the advent of piezoelectric ceramics, many countries at home and abroad have carried out systematic research on piezoelectric ceramics, and with the deepening of research and development, a series of PZT piezoelectric ceramic materials with superior performance have also been developed. The application of piezoelectric ceramic materials The scope is also greatly expanded, with lead zirconate titanate as the basis for modification. In order to obtain high-performance piezoelectric ceramics, most of the PZT materials themselves are doped and modified, and the properties of PZT piezoelectric ceramics are adjusted by doping the A-site or B-site ions in the PZT piezoelectric ceramics. [0003] W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/08H01L41/187H10N30/00H10N30/853
CPCH10N30/853H10N30/101
Inventor 欧明姜知水文理董进杰
Owner 欧明