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Method for toughing piezoelectric ceramics and toughened piezoelectric ceramics

A piezoelectric ceramic, toughening technology

Inactive Publication Date: 2012-12-19
SUZHOU PANT PIEZOELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the toughening of piezoelectric ceramics is mainly done by adding a second phase (particles, fibers, whiskers, etc.). Piezoelectric ceramics containing lead, such as the PZT series and PT series piezoelectric ceramics mentioned above, the additional second phase is also easy to eutectic with ceramics

Method used

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  • Method for toughing piezoelectric ceramics and toughened piezoelectric ceramics
  • Method for toughing piezoelectric ceramics and toughened piezoelectric ceramics

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A Pb(Zr 0.52 Ti 0.48 )O 3 A toughening method for piezoelectric ceramics, comprising the steps of:

[0025] (1) Obtain piezoelectric ceramic powder satisfying D50≤1.2μm and D90≤4.0μm:

[0026] According to the chemical composition Pb(Zr 0.52 Ti 0.48 )O 3 Configure the raw materials, put the configured raw materials into the rubber hopper together, add steel balls according to the mass ratio of the material balls to 1:2, mix the hopper with the raw materials and steel balls on the vibrating mill for 5 hours, take out the evenly mixed raw materials, and place Put it into an alumina crucible, and calcinate the synthesized piezoelectric ceramic frit in a box furnace at 900°C for 180 minutes. After it is cooled to room temperature, take out the frit, transfer it to the rubber hopper after coarse crushing, put it on the vibrating mill and vibrate and finely grind it for 8 hours, then take a sample to test the particle size of the powder, if it meets D50≤1.2μm, D90≤4.0μm...

Embodiment 2

[0035] A (Pb 0.90 B a0.10 )(Zr 0.52 Ti 0.48 )O 3 (PBZT) the toughening method of piezoelectric ceramics, comprises the steps:

[0036] (1) Obtain piezoelectric ceramic powder satisfying D50≤1.2μm and D90≤4.0μm: According to the chemical composition (Pb 0.90 B a0.10 )(Zr 0.52 Ti 0.48 )O 3 (PBZT) Configure the raw materials, put the configured raw materials into the rubber hopper together, add steel balls according to the mass ratio of the material balls to 1:2, mix the hopper with raw materials and steel balls on the vibrating mill for 5 hours, and take out the evenly mixed The raw materials were put into an alumina crucible, and were calcined in a box furnace at 1090°C for 180 minutes to synthesize a piezoelectric ceramic frit. After it is cooled to room temperature, take out the frit, transfer it to the rubber hopper after coarse crushing, put it on the vibrating mill and vibrate and finely grind it for 8 hours, then take a sample to test the particle size of the pow...

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Abstract

The invention relates to a method for toughing piezoelectric ceramics by adding a second phase, wherein the second phase is a potassium titanate whisker, and the added amount of the potassium titanate whisker is 0.1 to 5 percent based on the weight of the piezoelectric ceramics; and the chemical formula of the potassium titanate whisker is K2O.nTiO2, and n in the formula may be 1, 2, 4, 6 or 8. In the invention, the potassium titanate whisker, in particular potassium hexatitanate, which is used as the second phase additive, has a good toughing effect and has the advantages of keeping or improving high voltage property and reducing medium loss. Moreover, the potassium titanate whisker has high mechanism performance and high temperature resistance and is stable in a piezoelectric ceramic structure, low in cost and convenient to fill in a dispersed way.

Description

technical field [0001] The invention relates to a toughening method of piezoelectric ceramics and piezoelectric ceramics. Background technique [0002] In the prior art, most of the practical piezoelectric ceramics are composed of ferroelectric materials, and the ferroelectric materials constitute PZT (PbZrO 3 -PbTiO 3 solid solution) and PT (PbTiO 3 solid solution) system and other perovskite structures. However, the inherent brittleness of ceramics limits its large strain characteristics, and is prone to fatigue damage, reducing its reliability in use. Especially with the miniaturization of electronic devices, higher requirements are placed on the toughness of piezoelectric ceramics. [0003] At present, the toughening of piezoelectric ceramics is mainly done by adding a second phase (particles, fibers, whiskers, etc.). Pb-containing piezoelectric ceramics, such as the PZT-based and PT-based piezoelectric ceramics mentioned above, have an additional second phase that ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/81
Inventor 范景波
Owner SUZHOU PANT PIEZOELECTRIC TECH