CN2760028Y - Cement-based piezoelectric composite material - Google Patents
Cement-based piezoelectric composite material Download PDFInfo
- Publication number
- CN2760028Y CN2760028Y CN 200420052601 CN200420052601U CN2760028Y CN 2760028 Y CN2760028 Y CN 2760028Y CN 200420052601 CN200420052601 CN 200420052601 CN 200420052601 U CN200420052601 U CN 200420052601U CN 2760028 Y CN2760028 Y CN 2760028Y
- Authority
- CN
- China
- Prior art keywords
- cement
- composite material
- piezoelectric
- utility
- model
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The utility model belongs to the technical field of a functional composite material, particularly a cement-based piezoelectric composite material. The composite material of the utility model is characterized in that a plurality of piezoelectric ceramic poles throughout a cement basal body are inserted in the cement basal body in a flat shape, the piezoelectric ceramic poles are perpendicular to the surface of the cement basal body and the upper and the lower surfaces of the cement basal body are respectively coated with a conductive coating. The cement-based piezoelectric composite material of the utility model has the advantages that the utility model has good compatibility with a matrix of concrete, and the sensing precision and the driving force of the piezoelectric material are improved; the utility model also has the advantages of low acoustic impedance, low dielectric constant, high electromechanical coupling coefficient, low mechanical quality coefficient, flexibility, controllability of a piezoelectric ceramic phase, etc. The preparation method of the utility model has the advantages of simple operation, low cost, good piezoelectric property of finished goods, etc.
Description
(1) technical field under
The utility model belongs to the functional composite material technical field, particularly a kind of cement base piezoelectric composite material.
(2) background technology
Along with developing rapidly of science and technology, the traditional water mud material of function singleness, the multifunctional engineering with rapid changepl. never-ending changes and improvements and the needs of new technology revolution can not have been adapted to, modern architecture has proposed new challenge to cement-base composite material, not only require cement-base composite material that high strength will be arranged, but also should have functions such as sound, light, electricity, magnetic, heat, to adapt to multi-functional and needs intelligent building.Therefore, the research and development of cement based functional composite material becomes focus gradually.
In recent years, smart material and structure penetrates in the field of civil engineering gradually.In large scale, the complex structure of numerous heavy construction structures in the field of civil engineering (as long span bridge beam, high-rise buildings and nuclear building etc.), in case lost efficacy, consequence will be catastrophic, to they security and durability requirement far above general building structure.Therefore, adopt smart material and structure that great civil engineering work is implemented online health monitoring and forecast, not only can significantly reduce the maintenance cost of structure, but also can avoid harm that the mankind are caused.As everyone knows, smart material and structure mainly is made up of sensing, driving and control three parts, piezoelectric is because himself characteristic, both can be used as sensing material, also can be as driving material, be one of most widely used general, most important smart material in the smart material and structure, its progress is determining the practicalization of smart material and structure.
Piezoelectric generally comprises piezoelectric ceramics, piezopolymer and polymer-based carbon piezo-electricity composite material.In field of civil engineering, more than three class piezoelectrics all have the problem of consistency difference with the concrete parent.Consistency is bad, and the sensing accuracy of smart material can reduce significantly, and the driving dynamics can be subjected to significant weakening.In field of civil engineering, structured material in the highest flight is a concrete, and concrete is compared with important structure material such as metal, plastics etc. in other field, at aspects such as deformation characteristic, rigidity and specific acoustic resistances essential distinction is arranged.In concrete solidification process, because the effect of aquation,, for example to freeze and thaw, humidity and drying or heating and cooling etc. can cause thermograde perhaps because the variation of outside temperature, these temperature difference can cause concrete non-homogeneous volume change.When the metastable piezoceramic material of volume is embedded in the concrete structure, if the variation of occurrence temperature or humidity will cause concrete and piezoelectricity material to tremble the inharmonious of distortion, thereby make smart material generation spurious signal, influence sensing accuracy, even the detection situation that can make a mistake.In addition, cement is alkaline, and piezopolymer and polymer-based carbon piezo-electricity composite material be in height alkaline cement environment, and chemical durability is relatively poor, and is easily aging, and the time does not have a health monitoring effect once long.Therefore, when the intelligence structure of development field of civil engineering, need to develop and field of civil engineering agent structure material---the piezoelectric smart material that concrete is compatible.
(3) summary of the invention
In order to overcome the deficiency of above technology, the utility model provides a kind of cement base piezoelectric composite material, this matrix material not only has low acoustic impedance, low-k, high electromechanical coupling factor, low mechanical quality factor and snappiness and piezoelectric ceramics advantages such as controllability mutually, and what is more important it and concrete parent have good consistency.
The utility model is achieved through the following technical solutions:
The utility model discloses a kind of cement base piezoelectric composite material, its special feature is: be embedded with the some piezoelectric ceramics posts that run through cement matrix in the flat cement matrix, the piezoelectric ceramics post is perpendicular to the surface of cement matrix, and the upper and lower surface of cement matrix scribbles conductive coating respectively.
Cement base piezoelectric composite material of the present utility model, described cement matrix is a matrix by the aluminosulfate cement or the ordinary Portland cement of high-early-strength.
Cement base piezoelectric composite material of the present utility model, in order to improve piezoelectric property, described piezoelectric ceramics post is made by the PZT of the higher doping vario-property of magnesium niobium lead zirconate titanate (PMN) or sol-gel method synthetic high pure and ultra-fine PZT and piezoelectric activity.
The volume percent that cement base piezoelectric composite material of the present utility model, described piezoelectric ceramics post account for matrix material is 20-50%.
Cement base piezoelectric composite material of the present utility model, in order to improve cement matrix and piezoelectric ceramics interface bond strength mutually, described piezoelectric ceramics post adopts tetrabutyl titanate to carry out surface treatment.
Cement base piezoelectric composite material of the present utility model, the water cement ratio of described cement matrix are 0.3-0.4.
Cement base piezoelectric composite material of the present utility model, its preparation method may further comprise the steps:
(1) on the good piezoelectric ceramics block of polarization, press some cycles, volume and size, cut into the series of ceramic post, after thoroughly cleaning up with acetone, with tetrabutyl titanate with its immersion after, be fixed in the mould then;
(2) mould is fixed on the shaking table, after by certain water cement ratio cement fully being stirred, under the situation of constantly vibration, cement casting in mould, is carried out maintenance;
(3) after the demoulding, two parallel surfaces up and down of the cement matrix that maintenance is good are polished respectively, after treating that the piezoelectric ceramics post is exposed on the two sides fully, polishing again, clean specimen surface with acetone then, coat low-temperature conductive silver slurry or vacuum metallizing on the two sides thinly equably, in vacuum drying oven, dry 1h-2h, drying temperature is 100-120 ℃, can obtain cement base piezoelectric composite material.
Among the above-mentioned preparation method, improve, avoid pore and crackle to produce, add appropriate amount of defoamer in the cement matrix for making the cement matrix density; Simultaneously, behind the casting cement, vacuumize processing, and then be placed on the shaking table and vibrate.
Cement base piezoelectric composite material of the present utility model is to be arranged in parallel in the cement matrix of three-dimensional communication and the two-phase piezo-electricity composite material that constitutes is commonly referred to as 1-3 type cement base piezoelectric composite material by unidimensional piezoelectric ceramics post.This matrix material has been concentrated the advantage of each phase material, and complementary monophasic shortcoming has low acoustic impedance, low-k, high electromechanical coupling factor, low mechanical quality factor and snappiness and piezoelectric ceramics advantages such as controllability mutually.In 1-3 type cement base piezoelectric composite material, because the snappiness of cement is better than the piezoelectric ceramics phase, therefore, it does the time spent when being subjected to external force, the stress that acts on the cement matrix will effectively pass to the piezoelectric ceramics phase, cause the stress of piezoelectric ceramics phase to amplify; The specific inductivity of cement matrix is extremely low simultaneously, and the specific inductivity of whole piezo-electricity composite material is descended significantly.The result of these two combined factors effects makes the piezoelectric voltage constant g of piezo-electricity composite material
33Obtain raising by a relatively large margin.Therefore, as sensing material, the over-all properties of 1-3 type cement base piezoelectric composite material is better than pure piezoelectric ceramics phase, is the sensing material of a kind of very potential and development prospect.The more important thing is that 1-3 type cement base piezoelectric composite material not only has good consistency with the concrete parent in field of civil engineering, and also being better than other smart material with the interface bond effect of concrete structure material, this has improved the sensing accuracy and the motivating force of piezoelectric greatly.Therefore, such composite study has widely engineering application value for all kinds of civil engineering structures of propelling to the intelligent direction development with exploitation.
The beneficial effect of cement base piezoelectric composite material of the present utility model is, because it and concrete parent have good consistency, improve the sensing accuracy and the motivating force of piezoelectric greatly, and have low acoustic impedance, low-k, high electromechanical coupling factor, low mechanical quality factor and snappiness and piezoelectric ceramics advantages such as controllability mutually.Advantages such as preparation method of the present utility model has simple to operate, and cost is low, is fit to suitability for industrialized production, and the finished product piezoelectric property is good.
(4) description of drawings
Fig. 1 is a 1-3 type cement base piezoelectric composite material preparation technology schema of the present utility model
Fig. 2 is the cross-sectional view of matrix material of the present utility model
Among the figure, 1 cement matrix, 2 piezoelectric ceramics posts, 3 conductive coatings
(5) embodiment
Further describe the utility model below by embodiment.
Embodiment 1
With the aluminosulfate cement is matrix, and magnesium niobium lead zirconate titanate (PMN) piezoelectric ceramics is a functive, and its salient features as shown in Table 1 and Table 2.
The salient features of table 1 magnesium niobium lead zirconate titanate
| Planar electromechanical coupling factor/K p | Transverse electromechanical coupling factor K 31 | Piezoelectric constant/d 33/pC·N -1 | Dielectric loss/tan δ | Relative permittivity/ε r | Mechanical quality factor/Q m | Curie temperature T c/℃ |
| 0.66 | 0.41 | 550 | 0.015 | 3800 | 55 | 200 |
The salient features of table 2 quick hardening sulphoaluminate cement
| Relative permittivity/ε r | Dielectric loss/tan δ | Volume density/g/cm 3 | Median size/μ m |
| 8.55 | 0.067 | 2.078 | 17.70 |
On the good PMN piezoelectric ceramics block of polarization, cutting length * wide * height is the series of ceramic post of 1 * 1 * 5mm respectively.The volume fraction that the piezoelectric ceramics post accounts for matrix material is respectively: 21.31%, 27.26%, 34.95%, 47.2%.After thoroughly cleaning up with acetone, it is soaked, make its surface have certain roughness, be convenient to improve cement matrix and piezoelectric ceramics interface bond strength mutually with tetrabutyl titanate.Be fixed in the mould, be placed on the shaking table.By water cement ratio be 0.4 cement fully stirred after, under the situation of constantly vibrations, with cement casting in mould, for the cement matrix density is improved, can in cement matrix, add appropriate amount of defoamer on the one hand, also can behind casting cement, vacuumize processing on the other hand, and then be placed on the shaking table and vibrate, to eliminate bubble and the crackle in the matrix.With the sample for preparing in the normal curing case (20 ℃, 100%RH) behind the maintenance 28d, two parallel surfaces up and down of the cement matrix that maintenance is good are polished respectively, treat that the piezoelectric ceramics post is exposed on the two sides fully after, again the polishing, clean specimen surface with acetone, coat low-temperature conductive silver slurry or vacuum metallizing then on the two sides thinly equably, dry 1h-2h in vacuum drying oven, drying temperature is 100-120 ℃, can obtain 1-3 type cement base piezoelectric composite material, its performance is as shown in table 3.
The structure of the matrix material that present embodiment is made as shown in Figure 2, cement matrix 1 is tabular, cement matrix 1 inside is embedded with the some piezoelectric ceramics posts 2 that run through cement matrix, and the piezoelectric ceramics post is perpendicular to the surface of cement matrix, and the upper and lower surface of cement matrix scribbles conductive coating 3 respectively.
The performance of table 3 1-3 type sulphoaluminate cement base piezo-electricity composite material
| PMN volume fraction/Vol% | d 33/pC·N -1 | g 33/mVm·N -1 | εr | K P/％ | K t/％ | Q m |
| 21.31 27.26 34.95 47.20 | 213.5 263.8 297.2 354.3 | 86.84 66.20 76.37 66.90 | 277.8 450.6 439.4 597.9 | 33.45 34.26 35.92 38.98 | 32.73 33.46 35.09 38.06 | 12.05 16.30 24.92 8.93 |
With the aluminosulfate cement is matrix, and magnesium niobium lead zirconate titanate (PMN) piezoelectric ceramics is a functive, and its salient features as shown in Table 1 and Table 2.
On the good PMN piezoelectric ceramics block of polarization, cutting length * wide * height is the series of ceramic post of 1 * 1 * 9mm respectively, and its volume fraction is: 22.72%.After thoroughly cleaning up with acetone, it is soaked, make its surface have certain roughness, be convenient to improve cement matrix and piezoelectric ceramics interface bond strength mutually with tetrabutyl titanate.Be fixed in the mould, be placed on the shaking table.By water cement ratio be 0.4 cement fully stirred after, under the situation of constantly vibration, with cement casting in mould, for the cement matrix density is improved, can in cement matrix, add appropriate amount of defoamer on the one hand, also can behind casting cement, vacuumize processing on the other hand, and then be placed on the shaking table and vibrate, to eliminate bubble and the crackle in the matrix.With the sample for preparing in the normal curing case (20 ℃, 100%RH) behind the maintenance 28d, two parallel surfaces up and down of the cement matrix that maintenance is good are polished respectively, treat that the piezoelectric ceramics post is exposed on the two sides fully after, polishing again.Be prepared into the 1-3 type sulphoaluminate cement base piezo-electricity composite material that thickness is respectively 2.6mm, 3.3mm, 5.0mm, 6.0mm, 7.7mm respectively, clean specimen surface with acetone, coat low-temperature conductive silver slurry or vacuum metallizing then thinly equably on the two sides, in vacuum drying oven, dry 1h-2h, drying temperature is 100-120 ℃, can obtain 1-3 type cement base piezoelectric composite material.The performance of the cement base piezoelectric composite material that five kinds of thickness is different is as shown in table 4
The performance of table 4 1-3 type sulphoaluminate cement base piezo-electricity composite material
| Performance | The flakiness ratio of piezoelectric ceramics post |
| 1/2.6 1/3.3 1/5.0 1/6.0 1/7.7 | |
| d 33/pC·N -1 g 33/mVm·N -1 ε r Q m f min/kHz f max/kHz Δf/kHz K p/％ K t/％ | 149.3 156.9 159.0 164.7 188.7 39.90 41.21 40.91 40.81 41.02 422.80 430.19 439.14 455.9 519.74 11.85 13.91 16.67 16.54 28.83 172.54 172.54 165.04 165.04 165.04 180.04 180.04 172.54 172.54 172.54 7.50 7.50 7.50 7.50 7.50 31.90 31.90 32.79 32.79 32.79 31.39 31.39 32.04 32.04 32.04 |
With the ordinary Portland cement is matrix, and magnesium niobium lead zirconate titanate (PMN) piezoelectric ceramics is a functive, and its salient features is as shown in table 2.
On the good PMN piezoelectric ceramics block of polarization, cut into the piezoelectric ceramics post of following series respectively, length * wide * height is respectively 1.25 * 1 * 7mm, 1.5 * 1 * 7mm and 1.75 * 1 * 7mm, and its volume fraction is: 20.5%.After thoroughly cleaning up with acetone, it is soaked, make its surface have certain roughness, be convenient to improve cement matrix and piezoelectric ceramics interface bond strength mutually with tetrabutyl titanate.Be fixed in the mould, be placed on the shaking table.By water cement ratio be 0.35 cement fully stirred after, under the situation of constantly vibration, with cement casting in mould, for the cement matrix density is improved, can in cement matrix, add appropriate amount of defoamer on the one hand, also can behind casting cement, vacuumize processing on the other hand, and then be placed on the shaking table and vibrate, to eliminate bubble and the crackle in the matrix.With the sample for preparing in the normal curing case (20 ℃, 100%RH) behind the maintenance 28d, two parallel surfaces up and down of the cement matrix that maintenance is good are polished respectively, treat that the piezoelectric ceramics post is exposed on the two sides fully after, polishing again.Coat low-temperature conductive silver slurry or vacuum metallizing then on the two sides thinly equably, dry 1h-2h in vacuum drying oven, drying temperature is 100-120 ℃, can obtain 1-3 type cement base piezoelectric composite material.The performance of the 1-3 type cement base piezoelectric composite material that three kinds of piezoelectric ceramics post long-width ratios are different is as shown in table 5.
The performance of table 5 1-3 type ordinary Portland cement base piezoelectric composite material
| Long-width ratio | Performance | ||||||||
| d 33/ pC·N -1 | g 33/ mVm· N -1 | ε r | Q m | f min/ kHz | f max/ kHz | Δf/ kHz | K p/％ | K t/％ | |
| 1.25/1 1.50/1 2.00/1 | 195.5 163.3 196.3 | 50.34 40.66 50.88 | 438.85 453.83 435.92 | 4.55 6.70 5.26 | 105.04 97.54 97.54 | 112.54 105.04 105.04 | 7.5 7.5 7.5 | 40.22 41.69 41.69 | 39.23 40.51 40.51 |
Claims (2)
1. cement base piezoelectric composite material, it is characterized in that: be embedded with the some piezoelectric ceramics posts that run through cement matrix in the flat cement matrix, the piezoelectric ceramics post is perpendicular to the surface of cement matrix, and the upper and lower surface of cement matrix scribbles conductive coating respectively.
2. cement base piezoelectric composite material according to claim 1 is characterized in that: described cement matrix is a matrix by the aluminosulfate cement or the ordinary Portland cement of high-early-strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420052601 CN2760028Y (en) | 2004-07-26 | 2004-07-26 | Cement-based piezoelectric composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420052601 CN2760028Y (en) | 2004-07-26 | 2004-07-26 | Cement-based piezoelectric composite material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2760028Y true CN2760028Y (en) | 2006-02-22 |
Family
ID=36082234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420052601 Expired - Fee Related CN2760028Y (en) | 2004-07-26 | 2004-07-26 | Cement-based piezoelectric composite material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2760028Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104883092A (en) * | 2015-06-19 | 2015-09-02 | 清华大学 | Road-use cement-based material pressure power generation packaging structure |
| CN105801172A (en) * | 2016-03-04 | 2016-07-27 | 济南大学 | Method for preparing cement-based piezoelectric composite material surface nickel electrode |
| US9556076B2 (en) | 2011-11-02 | 2017-01-31 | Empire Technology Development Llc | Salt resistant cement |
| US9725967B2 (en) | 2013-07-24 | 2017-08-08 | Bp Corporation North America Inc. | Centralizers for centralizing well casings |
| CN109357795A (en) * | 2018-12-28 | 2019-02-19 | 吉林建筑大学 | A kind of cement base piezoelectric composite material sensor |
| CN110156364A (en) * | 2019-05-10 | 2019-08-23 | 济南大学 | The method and its application that piezoelectric ceramics surface is modified using Si-Ti-Ca tri compound film |
-
2004
- 2004-07-26 CN CN 200420052601 patent/CN2760028Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9556076B2 (en) | 2011-11-02 | 2017-01-31 | Empire Technology Development Llc | Salt resistant cement |
| US9725967B2 (en) | 2013-07-24 | 2017-08-08 | Bp Corporation North America Inc. | Centralizers for centralizing well casings |
| CN104883092A (en) * | 2015-06-19 | 2015-09-02 | 清华大学 | Road-use cement-based material pressure power generation packaging structure |
| CN104883092B (en) * | 2015-06-19 | 2017-02-01 | 清华大学 | Road-use cement-based material pressure power generation packaging structure |
| CN105801172A (en) * | 2016-03-04 | 2016-07-27 | 济南大学 | Method for preparing cement-based piezoelectric composite material surface nickel electrode |
| CN105801172B (en) * | 2016-03-04 | 2018-01-09 | 济南大学 | A kind of preparation method of cement base piezoelectric composite material surface nickel electrode |
| CN109357795A (en) * | 2018-12-28 | 2019-02-19 | 吉林建筑大学 | A kind of cement base piezoelectric composite material sensor |
| CN109357795B (en) * | 2018-12-28 | 2023-09-01 | 吉林建筑大学 | Cement-based piezoelectric composite material sensor |
| CN110156364A (en) * | 2019-05-10 | 2019-08-23 | 济南大学 | The method and its application that piezoelectric ceramics surface is modified using Si-Ti-Ca tri compound film |
| CN110156364B (en) * | 2019-05-10 | 2021-04-30 | 济南大学 | Method for modifying piezoelectric ceramic surface by adopting Si-Ti-Ca ternary composite film and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101255265B (en) | Leadless piezoelectric ceramics/polymer 1-3 structure composite material and method for processing same | |
| CN101538144B (en) | 2-2 type cement base piezoelectric composite material | |
| CN2760028Y (en) | Cement-based piezoelectric composite material | |
| CN102260061A (en) | 1-3 type polymer/cement-based piezoelectric composite material and preparation method thereof | |
| Xu et al. | Piezoelectric properties of a pioneering 3‐1 type PZT/epoxy composites based on freeze‐casting processing | |
| Piazza et al. | Piezoceramic material with anisotropic graded porosity | |
| Hao et al. | Flexible piezoelectric energy harvester with an ultrahigh transduction coefficient by the interconnected skeleton design strategy | |
| CN1254986A (en) | Surface acoustic wave (SAW) device | |
| CN1285453C (en) | Cement based piezoelectric intelligent composite material and its preparing method | |
| CN1298674C (en) | Method for preparing piezoelectric ceramic film | |
| CN109341843B (en) | Micro-vibration sensor and preparation method thereof | |
| CN106007711A (en) | Preparation method of piezoelectric tubes with high length-diameter ratio | |
| CN1395325A (en) | Three-component compound magnetoelectric material using organic polymer as adhesive and its preparation method | |
| WO2004057683A1 (en) | Piezoelectric transducing sheet | |
| Xu et al. | Effect of cement matrix and composite thickness on properties of 2-2 type cement-based piezoelectric composites | |
| CN1204085C (en) | Ion dosed sodium barium titanate-barium titanate piezo ceramics and preparation thereof | |
| CN100465395C (en) | Layered cement base piezoelectric intelligent composite material and preparation method thereof | |
| JP3968430B2 (en) | Lead zirconate titanate fiber, smart board using lead zirconate titanate fiber, and actuator and sensor using smart board | |
| CN1291774A (en) | Piezoelectric ceramics and surface wave device with said piezoelectric ceramics | |
| CN105801172B (en) | A kind of preparation method of cement base piezoelectric composite material surface nickel electrode | |
| Dong et al. | Piezoelectric Composites: State-of-the-Art and Future Prospects | |
| CN1129359A (en) | Piezoelectric/electrostrictive film element having convex diaphragm portions and method of producing the same | |
| Jia et al. | Conformally Large-Area Single-Crystal Piezocomposites with High Performance for Acoustic Transducers | |
| CN100548918C (en) | A kind of low dielectric loss piezoelectric ceramic material and preparation method thereof | |
| JPH09221364A (en) | Anisotropic 3-3 connecting type piezoelectric composite material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |