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Nano lead zirconate titanate/cement piezoelectricity composite material and preparation method thereof

A technology of piezoelectric composite materials and lead zirconate titanate, which is applied in the direction of transmitting sensing components by electric/magnetic devices, can solve problems such as poor connectivity, and achieve improved connectivity, good interface and impedance matching, and small particle size Effect

Inactive Publication Date: 2007-10-17
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem of poor connectivity between piezoelectric phase lead zirconate titanate powders in the prior art, the present invention provides a nano lead zirconate titanate / cement piezoelectric composite material with high piezoelectric responsiveness and a preparation method thereof. Material could be used to make sensors for concrete building structures in civil engineering

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: Preparation of nanometer lead zirconate titanate powder

[0014] Lead acetate, zirconium n-propoxide and titanium isopropoxide are used as raw materials to prepare nano-lead zirconate titanate powder by sol-gel method, wherein the atomic ratio of lead, zirconium and titanium in the raw material ratio is 1:0.52:0.48. Dissolve lead acetate in acetic acid, heat and reflux at 110°C for 1 hour, then add zirconium n-propoxide and continue to reflux for 2 hours, then add titanium isopropoxide to reflux for 2 hours, then add a small amount of deionized water, and reflux at the same temperature for 1 hour hours, a transparent sol can be obtained, and after drying, calcining at 800°C can obtain nano-lead zirconate titanate powder, the primary particle size is 50-70nm, and the soft agglomerated particle size is 200-300nm.

Embodiment 2

[0016] A nanometer lead zirconate titanate / cement piezoelectric composite material is composed of 70% of nanometer lead zirconate titanate and 30% of cement, both of which are in mass percentage. The atomic ratio of lead, zirconium and titanium in the lead zirconate titanate nanopowder is 1:0.52:0.48, the primary particle diameter is 50-70nm, and the soft aggregate particle diameter is 200-300nm.

[0017] The preparation method of nano lead zirconate titanate / cement piezoelectric composite material, the steps are as follows:

[0018] (1) Mix and grind 70% nano-lead zirconate titanate and 30% cement in a ball mill for 10 minutes, add water according to 5% of the mass of the mixed powder, mix and grind for 5 minutes, and mix well.

[0019] (2) Press the mixture in step (1) into a disc shape under a pressure of 100 MPa, put it into an environment with a humidity of 100%, hydrate it for 24 hours, and then dry it.

[0020] After drying, both sides of the wafer were coated with sil...

Embodiment 3

[0022] A nanometer lead zirconate titanate / cement piezoelectric composite material is composed of 76% of nanometer lead zirconate titanate and 24% of cement, all of which are in mass percentage. The atomic ratio of lead, zirconium and titanium in the lead zirconate titanate nanopowder is 1:0.54:0.46, the primary particle diameter is 50-70nm, and the soft aggregate particle diameter is 200-300nm.

[0023] The preparation method of nano lead zirconate titanate / cement piezoelectric composite material, the steps are as follows:

[0024] (1) Mix and grind 76% nano-lead zirconate titanate and 24% cement in a ball mill for 10 minutes, add water according to 5% of the mass of the mixed powder, mix and grind for 5 minutes, and mix well.

[0025] (2) Press the mixture in step (1) into a disc shape under a pressure of 100 MPa, put it into an environment with a humidity of 100%, hydrate it for 24 hours, and then dry it.

[0026] After drying, both sides of the wafer were coated with silv...

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Abstract

The invention relates to a nano lead zirconate titanate / cement piezoelectric composite material used in civil engineering sensors and preparation method thereof. The piezoelectric composite material is composed of nano lead zirconate titanate and cement. The preparation method comprises: blending uniformly nano lead zirconate titanate powder and cement powder and water, pressing the mixture in disc shape, then hydrating, drying. The processed material through polarizing and ageing can be used for preparing civil engineering sensors. The piezoelectric composite material of the invention has better connectivity and well piezoelectric response.

Description

technical field [0001] The invention relates to a nano lead zirconate titanate / cement piezoelectric composite material for civil engineering sensors and a preparation method thereof, belonging to the technical field of functional composite materials. Background technique [0002] Lead zirconate titanate ceramic material is a kind of piezoelectric ceramic material that has been studied a lot in recent decades. It has high dielectric constant, electromechanical coupling coefficient, and low dielectric loss. It is widely used as piezoelectric actuators and piezoelectric ultrasonic transducers. and piezoelectric sensors. However, when these sensors are used to test building structures with concrete materials as the main body, the signal-to-noise ratio of the measured signal is high due to the mismatch between the ceramic material used as the sensor and the interface and acoustic impedance of the detected concrete main material, and False signals are prone to appear and cannot r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00G01D5/12
CPCC04B28/02
Inventor 龚红宇李宗津张玉军
Owner SHANDONG UNIV
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