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Preparation method of piezoelectric gel composite

A composite material and gelling technology, which is applied in the field of building materials, can solve the problems of high preparation energy consumption, unstable performance, and long preparation time, and achieve the effect of good interface bonding, reduced gaps, and small pores

Inactive Publication Date: 2012-07-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention overcomes the shortcomings of cement-based piezoelectric composite materials such as low piezoelectric performance in the early stage, unstable performance, long preparation time, and large preparation energy consumption, and provides a preparation method for piezoelectric gelled composite materials. The obtained piezoelectric composite materials can be used in civil engineering Widely used in engineering fields

Method used

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  • Preparation method of piezoelectric gel composite

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Embodiment Construction

[0010] The present invention is further illustrated below by way of examples.

[0011] The invention is a piezoelectric gel composite material calcined by various compounds, and its raw material includes P b3 o 4 , ZrO 2 ,TiO 2 , Nb 2 o 5 , CaCO 3 , Al 2 o 3 , CaSO 4 2H 2 O or CaSO 4 . and made by the following method: first, the molar ratio of 1 / 3:0.52:0.48:0.01 P b3 o 4 , ZrO 2 ,TiO 2 and Nb 2 o 5 A mixture of CaCO with a molar ratio of 3:3:1 3 , Al 2 o 3 , CaSO 4 2H 2 O or CaSO 4 According to the mass ratio (80-90): (10-20), weigh each component (see Table 1) and mix evenly; form a column or sheet under a pressure of 10-200 Mpa, and form a column or sheet under a pressure of 850-20 Pre-fire at 1000°C for 2-4 hours; then grind the pre-fired cylinder or sheet into powder, add 1-2% polyvinyl alcohol, and form a cylinder under a pressure of 10-200 MPa Or flakes, calcined at 1150-1250°C for 2-4 hours, and re-grinded into a powder with a fineness of 100 μm...

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Abstract

The invention relates to a preparation method of a piezoelectric gel composite. The preparation method comprises the following special steps: weighting the mixture of Pb3O4, ZrO2, TiO2 and Nb2O5 and the mixture of CaCO3, Al2O3 and CaSO4.2H2O or CaSO4 according to a weight ratio of (80-90):(10-20), wherein the molar ratio of Pb3O4 to ZrO2, TiO2 and Nb2O5 is 1 / 3:0.52:0.48:0.01 and the molar ratio of CaCO3 to Al2O3 and CaSO4.2H2O or CaSO4 is 3:3:1; mixing evenly; forming columns or flakes at 10-200Mpa, preburning at 850-1000 DEG C for 2-4h; and grinding the obtained columns or flakes to powder, adding polyvinyl alcohol which accounts for 1-2wt% of the powder, forming columns or flakes at 10-200 Mpa, calcining at 1150-1250 DEG C for 2-4h, and grinding again to obtain powder of which fineness is less than 100mu m and prepare the anhydrous calcium sulphoaluminate piezoelectric gel composite. As containing 80-90% of lead niobium zirconate titanate, the composite has piezoelectricity; as containing 10-20% of anhydrous calcium sulphoaluminate, the composite has gelling property; and the hydration speed of anhydrous calcium sulphoaluminate is high. By adopting the preparation method of the invention, the defects that the cement-based piezoelectric composite has low early piezoelectric property and long preparation time, is not stable, etc., can be solved.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a preparation method of a piezoelectric gelled composite material which is prepared by calcining and has both gelation and piezoelectricity. Background technique [0002] So far, the total length of my country's railways will reach hundreds of thousands of kilometers, the total length of highways will be several million kilometers, the urban rail transit will be thousands of kilometers long, and the number of large reservoirs will reach more than 100,000. These infrastructures are related to the national economy and the people's livelihood, and are large in scale and complex in structure. Once they fail, it will cause disastrous consequences. Therefore, it is of great practical significance to use intelligent materials and structures to express vibration, deformation and damage in other ways, and to implement online monitoring of major civil engineering buildings. D...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14
Inventor 李好新朱洪波杨玉颖
Owner TONGJI UNIV