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Lead-free cement-based piezoelectric composite material and preparation method thereof

A piezoelectric composite material and composite material technology are applied in the field of environment-friendly and high-efficiency cement-based piezoelectric composite materials and their preparation, which can solve the problems of unsuitability for use, failure to meet environmental protection requirements, damage to human beings and ecological environment, and the like, and achieve cost Low, excellent piezoelectric properties and polarization efficiency, effects of excellent piezoelectric and dielectric properties

Inactive Publication Date: 2014-03-12
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main component of lead zirconate titanate is lead oxide, which is a volatile toxic substance, which will cause serious damage to humans and the ecological environment during production, use and disposal.
Therefore, the traditional lead zirconate titanate-based cement-based piezoelectric materials can no longer meet the current environmental protection requirements, and are no longer suitable for use in various civil engineering projects.

Method used

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  • Lead-free cement-based piezoelectric composite material and preparation method thereof
  • Lead-free cement-based piezoelectric composite material and preparation method thereof
  • Lead-free cement-based piezoelectric composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] a. Mix 50% of pure-phase barium zirconate titanate ceramic particles and 50% of ordinary portland cement according to the mass percentage, using absolute ethanol as the medium, and ball milling, the ball milling time is 30min, after drying, sieve to obtain the mixture, and set aside;

[0017] b. Add water to the obtained mixture. The amount of water added is 15% of the weight of the cement. After fully stirring, it is pressed into a 10mm×1mm disc by a conventional compression molding method, and the molding pressure is 100MPa. Steam in the curing box Heat curing, the temperature is 80°C, 100%RH, after 2 days, scrub the surface with acetone, then evenly coat the non-burning electrodes on both sides of the pressed sheet, dry in a drying oven for 2 hours, and the drying temperature is 80°C, Then conduct polarization in silicone oil, the polarization field strength is 1.5kv / mm, the polarization temperature is 40°C, and the polarization time is 40min, the lead-free cement-bas...

Embodiment 2

[0019] a. Mix 55% of pure-phase barium zirconate titanate ceramic particles and 45% of ordinary portland cement according to the mass percentage, and use absolute ethanol as the medium, mix them by ball milling, the ball milling time is 35min, and sieve after drying to obtain the mixture, which is set aside;

[0020] b. Add water to the obtained mixture. The amount of water added is 20% of the weight of the cement. After fully stirring, it is pressed into a disc of 10mm×1mm by conventional compression molding method. The molding pressure is 105MPa, and steam is carried out in the curing box. Heat curing, the temperature is 80°C, 100%RH, after 2 days, scrub the surface with acetone, then evenly coat the non-burning electrodes on both sides of the pressed sheet, dry in a drying oven for 3 hours, and the drying temperature is 85°C, Then conduct polarization in silicone oil, the polarization field intensity is 2.0kv / mm, the polarization temperature is 45°C, and the polarization tim...

Embodiment 3

[0022] a. Mix 60% of pure-phase barium zirconate titanate ceramic particles and 40% of ordinary portland cement according to the mass percentage, and use absolute ethanol as the medium, mix them by ball milling, the ball milling time is 40min, and sieve after drying to obtain the mixture, which is set aside;

[0023] b. Add water to the obtained mixture. The amount of water added is 25% of the weight of the cement. After fully stirring, it is pressed into a disc of 10mm×1mm by a conventional compression molding method, and the molding pressure is 110MPa. Steam in the curing box Heat curing, the temperature is 80°C, 100%RH, after 2 days, scrub the surface with acetone, then evenly coat the non-burning electrodes on both sides of the pressed sheet, dry in a drying oven for 2.5h, and the drying temperature is 90°C , and then conduct polarization in silicone oil, the polarization field strength is 2.5kv / mm, the polarization temperature is 55°C, and the polarization time is 45min, t...

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Abstract

The invention relates to a lead-free cement-based piezoelectric composite material and a preparation method thereof. The composite material is prepared from silicate cement and pure-phase barium zirconate titanate ceramic particles. The preparation method comprises the following steps: ball-milling and mixing the silicate cement and pure-phase barium zirconate titanate ceramic particles by using absolute ethyl alcohol as a medium, adding water to sufficiently stir, press-forming, conserving and polarizing to obtain the composite material, wherein after standing for 24 hours, the piezoelectric coefficient of the composite material can achieve 130PC / N, the composite material is 0-3 type structure, environment-friendly, good in piezoelectric response performance, simple in preparation process, low in cost, convenient to spread, and capable of maintaining good piezoelectric performance under a high temperature. The cement-based piezoelectric material is environment-friendly, good in piezoelectric response performance, simple in preparation process, low in cost and convenient to spread.

Description

technical field [0001] The invention belongs to the field of piezoelectric materials, and in particular relates to an environment-friendly high-efficiency cement-based piezoelectric composite material and a preparation method thereof. Background technique [0002] Piezoelectric composite material refers to a new material with piezoelectric effect composed of at least one piezoelectric phase material and non-piezoelectric phase material combined in a certain way. According to the connection mode of each phase material, piezoelectric composite materials are divided into ten basic types, namely 0-0, 0-1, 0-3, 1-1, 1-2, 1-3, 2-2, 2- 3. 3-3.0-3 type cement-based piezoelectric composite material refers to a composite material formed by uniformly dispersing piezoelectric functional body particles with piezoelectric effect in a three-dimensional continuous cement matrix. It has excellent compatibility with concrete and good interface bonding effect. The driving force and precision ...

Claims

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Application Information

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IPC IPC(8): C04B28/04
Inventor 徐金宝张家齐王磊边亮
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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