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Nanometer carbon black/nanometer lead zirconate titanate/cement piezoelectric composite material and preparation method thereof

A piezoelectric composite material, lead zirconate titanate technology, which is applied in the direction of using electric/magnetic devices to transmit sensing components, can solve the problems of low piezoelectric response and cannot meet practical applications, and achieves good crystallinity, good interface and Impedance matching, small particle size effect

Inactive Publication Date: 2010-10-06
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the piezoelectric response of cement-based piezoelectric composites is still low, which cannot meet the requirements of practical applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: nano-carbon black / nanometer lead zirconate titanate / cement piezoelectric composite material, the components are: 77.6 parts of nano-lead zirconate titanate, 22 parts of cement, and 0.4 parts of nano-carbon black, all of which are parts by mass. The average particle diameter of the nano-carbon black is 65 nanometers. Preparation method, the steps are as follows:

[0016] (1) Lead acetate, zirconium n-propoxide and titanium isopropoxide are used as raw materials, wherein the atomic ratio of lead, zirconium and titanium in the ratio of raw materials is 1:0.52:0.48. Dissolve lead acetate in acetic acid, heat and reflux at 105°C for 1.5 hours, then add zirconium n-propoxide and continue to reflux for 2 hours, then add titanium isopropoxide and reflux for 2 hours, then add 15% wt (based on the total amount of raw materials) for deionization Water, reflux at the same temperature for 1 hour to obtain a transparent sol, after drying, calcining at 850°C to obtain nano...

Embodiment 2

[0021] A nano-carbon black / nanometer lead zirconate titanate / cement piezoelectric composite material, the components of which are: 69.7 parts of nano-lead zirconate titanate, 0.3 parts of nano-carbon black, and 30 parts of cement, all of which are parts by mass. The preparation method of the lead zirconate titanate nanopowder is the same as that in Example 1. The average particle diameter of the nano-carbon black is 60 nanometers.

[0022] Mix and grind nano lead zirconate titanate, nano carbon black and cement in a ball mill for 10 minutes, the grinding medium is acetone, dry the mixed powder after mixing, add water according to 5% of the mass of the mixed powder, and mix evenly. The resulting mixture was pressed into a disc shape under a pressure of 100 MPa, placed in an environment with a humidity of 100%, hydrated for 24 hours, and then dried.

[0023] After drying, the discs were coated with silver electrodes on both sides and polarized in silicone oil at room temperatur...

Embodiment 3

[0025] A nano-carbon black / nanometer lead zirconate titanate / cement piezoelectric composite material, the components of which are: 75.8 parts of nano-lead zirconate titanate, 0.2 parts of nano-carbon black, and 24 parts of cement, all in mass percent. The preparation method of the lead zirconate titanate nanopowder is the same as that in Example 1. The average particle diameter of the nano-carbon black is 60 nanometers. Mix and grind nano-lead zirconate titanate, nano-carbon black and cement in a ball mill for 10 minutes, the grinding medium is acetone, dry the mixed powder after mixing, add water according to 5% of the mass of the mixed powder, and mix evenly. The resulting mixture was pressed into a disc shape under a pressure of 100 MPa, placed in an environment with a humidity of 100%, hydrated for 24 hours, and then dried.

[0026] After drying, the discs were coated with silver electrodes on both sides and polarized in silicone oil at room temperature for 30 minutes at ...

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Abstract

The invention relates to a nanometer carbon black / nanometer lead zirconate titanate / cement piezoelectric composite material and a preparation method thereof. The piezoelectric composite material consists of the nanometer lead zirconate titanate, the nanometer carbon black and the cement. The preparation method of the composite materials comprises the following steps: evenly mixing nanometer lead zirconate titanate powder, nanometer carbon black powder, cement powder and water; pressing the mixture into a wafer shape; and hydrating and drying the mixture. The material can be used for preparinga civil engineering sensor after polarizing and aging. The piezoelectric composite material has excellent piezoelectric responsivity.

Description

technical field [0001] The invention relates to a nano carbon black / 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 piezoelectric ceramics are the most widely used piezoelectric materials so far. They have the advantages of high dielectric constant, large piezoelectric response, and high electromechanical coupling coefficient. They are widely used in piezoelectric actuators, piezoelectric ultrasonic transducers and piezoelectric materials. Sensing devices such as electric sensors. But when these sensors are used to test the building structure with concrete material as the main body, due to the mismatch of the interface and acoustic impedance between the piezoelectric ceramic material used as the sensor and the concrete main material to be detected, the piezoelectric senso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00G01D5/12
Inventor 龚红宇张玉军李宗津范润华全静
Owner SHANDONG UNIV
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