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Preparation method of lead lanthanum zirconate titanate piezoelectric ceramic formed by thermocuring powder injection molding

A powder injection molding, lead lanthanum zirconate titanate technology, which is applied in the field of preparation of lead lanthanum zirconate titanate piezoelectric ceramics, can solve the problem that the strength of the ceramic injection blank is not very high, and can overcome the problems of low molding efficiency, high density, and the high cost effect

Active Publication Date: 2021-06-29
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its shortcomings are also obvious. The ceramic injection embryos made by this method are generally not very strong.

Method used

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  • Preparation method of lead lanthanum zirconate titanate piezoelectric ceramic formed by thermocuring powder injection molding
  • Preparation method of lead lanthanum zirconate titanate piezoelectric ceramic formed by thermocuring powder injection molding
  • Preparation method of lead lanthanum zirconate titanate piezoelectric ceramic formed by thermocuring powder injection molding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation formula is Pb 0.91 La 0.06 (Zr 0.58 Ti 0.42 ) 0.975 Nb 0.02 o 3 The lead lanthanum zirconate titanate piezoelectric ceramic powder, the Pb 3 o 4 (64.4%), La 2 o 3 (3.08%), ZrO 2 (21.9%), TiO 2 (10.31%) and Nb 2 o 5 (0.39%) mixed uniformly and pre-fired at 850° C. for 5 hours to obtain piezoelectric ceramic powder.

[0033]Weigh 100g of lead zirconate titanate lanthanum piezoelectric ceramic powder, and take by weighing a surface treatment agent (stearic acid) whose mass is 1% of the powder mass, pour it into a ball mill jar and add zirconia grinding balls and grinding medium dehydrated alcohol Perform ball milling; the rotating speed is 400rmp, and the time is 24 hours. This process can grind the ceramic particles to reduce the particle size of the powder, and at the same time make the surfactant evenly attached to the surface of the ceramic powder. The mass ratio of ceramic powder and zirconia ball is 1:2, and the volume ratio of ceramic ...

Embodiment 2

[0042] The preparation formula is Pb 0.91 La 0.06 (Zr 0.58 Ti 0.42 ) 0.975 Nb 0.02 o 3 Lead lanthanum zirconate titanate piezoelectric ceramic powder, which is prepared by the method described in Example (1).

[0043] Take by weighing 100g lead lanthanum zirconate titanate piezoelectric ceramic powder, and take by weighing the surface treatment agent (lead stearate) that quality is described powder mass 2%, pour into ball mill pot and add grinding ball zirconia ball and grinding medium without Water and ethanol are ball milled; the rotating speed is 400rmp, and the time is 24 hours. This process can grind the ceramic particles to reduce the particle size of the powder, and at the same time make the surfactant evenly adhere to the surface of the ceramic powder, and modify the lead lanthanum zirconate titanate piezoelectric ceramics. The mass ratio of ceramic powder and zirconia ball is 1:2, and the volume ratio of ceramic powder and absolute ethanol is 1:1. After ball m...

Embodiment 3

[0052] The preparation formula is Pb 0.91 La 0.06 (Zr 0.58 Ti 0.42 ) 0.975 Nb 0.02 o 3 Lead lanthanum zirconate titanate piezoelectric ceramic powder, which is prepared by the method described in Example (1).

[0053] Weigh the lead zirconate titanate lanthanum piezoelectric ceramic powder, and weigh the surface treatment agent (lead stearate) whose mass is 2% of the powder mass, pour it into the ball mill jar and add grinding balls, zirconia balls and grinding media anhydrous Ethanol was ball milled; the rotating speed was 400rmp, and the time was 24 hours. This process can grind the ceramic particles to reduce the particle size of the powder, and at the same time make the surfactant evenly adhere to the surface of the ceramic powder, and modify the lead lanthanum zirconate titanate piezoelectric ceramics. The mass ratio of ceramic powder and zirconia ball is 1:2, and the volume ratio of ceramic powder and absolute ethanol is 1:1. After ball milling, it is dried and g...

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Abstract

The invention belongs to the technical field of piezoelectric ceramic additive manufacturing, and particularly relates to a preparation method of a lead lanthanum zirconate titanate piezoelectric ceramic formed by thermocuring powder injection molding. The method comprises the following steps: modifying lead lanthanum zirconate titanate piezoelectric ceramic powder to obtain piezoelectric ceramic fine powder with excellent performance; carrying out ball-milling mixing on the modified ceramic fine powder, a bonding resin, a curing agent and a diluent under vacuum to obtain uniformly dispersed piezoelectric ceramic slurry with moderate viscosity; injecting the prepared ceramic slurry into a heated mold, and carrying out thermocuring molding to obtain a ceramic green body; and finally, degreasing, sintering, silvering and polarizing the ceramic green body to obtain the compact lead lanthanum zirconate titanate piezoelectric ceramic. According to the invention, the prepared ceramic slurry is uniform in particle dispersion and low in viscosity, and can be thermally cured in a mold after powder injection to form a component, the component is high in strength and easy to transfer and sinter, and a sintered sample is high in density and excellent in electrical property, and meets the use requirements of piezoelectric devices.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing of piezoelectric ceramics, and in particular relates to a preparation method of lead lanthanum zirconate titanate piezoelectric ceramics by injection molding of thermosetting powder. Background technique [0002] Piezoelectric ceramics are the most widely used and most representative type of piezoelectric materials. Due to their special internal domain structure and the ability to convert electrical signals into mechanical signals, they are used to produce various types of piezoelectric materials. original. The most widely used piezoelectric ceramics are PLZT (lead lanthanum zirconate titanate) ceramics. PLZT piezoelectric ceramics have a high Curie temperature (380°C), easy doping modification, stable piezoelectric constant, Good quality factor, electromechanical coupling coefficient and high dielectric constant are of great significance in the field of piezoelectric sensing and d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/491C04B35/622C04B35/626C04B35/634C04B35/638C04B35/64B28B1/24B28B11/24B28C1/16
CPCC04B35/491C04B35/622C04B35/6261C04B35/63424C04B35/638C04B35/64B28B1/24B28B11/243B28C1/16C04B2235/3227C04B2235/3251C04B2235/6562C04B2235/6567C04B2235/6583Y02P10/25
Inventor 刘春林刘卉婷吴盾成骏峰曹峥
Owner CHANGZHOU UNIV
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