CN106003849B - A kind of functionally graded piezoelectric strip preparation method that can improve break resistance - Google Patents

A kind of functionally graded piezoelectric strip preparation method that can improve break resistance Download PDF

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Publication number
CN106003849B
CN106003849B CN201610317778.4A CN201610317778A CN106003849B CN 106003849 B CN106003849 B CN 106003849B CN 201610317778 A CN201610317778 A CN 201610317778A CN 106003849 B CN106003849 B CN 106003849B
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glass fiber
functionally graded
adhesive
raw material
elongated
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CN106003849A (en
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周立明
孟广伟
孙晨凯
李锋
顾帅
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Jilin University
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Jilin University
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Abstract

The present invention relates to a kind of functionally graded piezoelectric strip preparation method that can improve break resistance, belong to the preparation method of functionally graded piezoelectric strip.Elongated glass fiber is subjected to transverse and longitudinal longitude and latitude grid establishment arrangement form mesh flake, adhesive is prepared, functionally graded piezoelectric strip is prepared, by hot pressing for functionally graded piezoelectric strip, using Static pressure high temperature large cavity synthetic method, 1,000 3000 DEG C of temperature.30~60Mpa of pressure, 20 40 minutes time.Advantage is：The functionally graded piezoelectric strip with high fracture property can be mass produced in batches so that functionally graded piezoelectric strip has more preferable use value and is more widely applied field.

Description

A kind of functionally graded piezoelectric strip preparation method that can improve break resistance
Technical field
The invention belongs to the preparation method of functionally graded piezoelectric strip.
Background technology
Existing functionally graded piezoelectric strip has hole, opening etc. because being actually needed material and need to use in use It is easy to the morphosis for cracking, being broken, when long-time uses easily fracture occurs for its material so that related product loses Go there should be effect.
In order to obtain larger driving force, the piezoelectric element used at present in engineering is mostly sandwich construction, such as piezoelectric bimorph Piece, Rainbow and piezoelectric pile etc..This structure, although obtaining larger driving force, some material compositions and property in element The suddenly change of matter, which can frequently result in, there is local stress mismatch in structure, i.e., obvious stress at interface layer be present Difference, its consequence are exactly tack coat low temperature is easy to crack, the easy creep of high temperature, and then shorten the life-span of element, and further reducing should The service life of the product produced with its material, produce the wasting of resources.
Existing functionally graded piezoelectric strip can produce defect (such as cavity, crackle) in preparation process, and this kind of defect is past Past is one of the main reason for functionally graded piezoelectric strip fails；Simultaneously because the specific function characteristic of functionally graded piezoelectric strip Cause its break resistance not high with its monoclinic crystal structure.
The work of the flexible adhesion agent of individual piezoelectricity interlayer of the existing functionally graded piezoelectric strip used in preparation process With single, be only used for the bonding of each layer, but itself and without the characteristic of corresponding each piezoelectric layer, that is, cause functionally gradient piezoelectricity The overall resistance to crack extension performance of material reduces, and may have certain inhibition to the piezoelectric signal of each piezoelectric layer again.
The content of the invention
The present invention provides a kind of functionally graded piezoelectric strip preparation method that can improve break resistance, to solve function The problem of gradient piezoelectric break resistance difference.
The present invention adopts the technical scheme that, comprises the following steps：
First, elongated glass fiber is subjected to transverse and longitudinal longitude and latitude grid establishment arrangement form mesh flake：
The fibre length 2-10mm of elongated glass fiber is taken, it is first bright and clean in bottom when transverse and longitudinal longitude and latitude mesh flake is made Same horizontal elongated glass fiber is tiled on glass sheet plane, each elongated glass fiber keeps its spacing 0.5-1.5mm, Spray glass cement to it with sprayer, herein on laying and first layer long glass fibres into 90 degree of second layer elongated glass fibers Silk is tieed up, afterwards by second piece of bright and clean glass plate tiling covering thereon, two layers of elongated glass fibers of transverse and longitudinal are helped with the weight of glass plate Tie up silk to bond, 10-20 minutes drop back is placed on lower floor's glass from upper glass plate, the mesh flake 1 of elongated glass fiber establishment It is standby on plate；
2nd, adhesive 2 is prepared, and is made up of the raw material of following volume parts：Polyvinyl alcohol 40-50 parts, glycerine 20-25 parts, Ethanol 8-10 parts, 20-30 parts of pure water, by all raw material hybrid filterings under the conditions of 80-95 DEG C；
The fibre length 0.2-0.8mm of short glass fiber is taken, using addition 2-10g in every 100ml adhesive Short glass fiber, rocking evenly machine low speed is placed on after being added into adhesive and is shaken up, 1-3 revolutions per seconds of rocking evenly machine rotating speed；
3rd, functionally graded piezoelectric strip is prepared：
A lamination electric layer raw material are first placed, smear the adhesive shaken up on the upper strata of piezoelectric layer raw material thereafter, it The mesh flake that the elongated glass fiber prepared before is worked out is placed on to the top of adhesive afterwards, thereafter in elongated glass fibers Smear the adhesive that has shaken up again above the mesh flake of dimension silk establishment, back upper place place it is next be laminated electric layer raw material, it Adhesive, mesh flake, the piezoelectric layer raw material of the establishment of elongated glass fiber of every layer afterwards repeat operation, and are grown placing If type glass fiber establishment mesh flake 1 when single grid can not complete flood coatings, multiple mesh flakes can be made gradually to fold Add, be sequentially coated on previous mesh flake 1-2mm, the idiosome of final functionally graded piezoelectric strip of the generation with hierarchical structure is standby With；
By hot pressing for functionally graded piezoelectric strip, using Static pressure high temperature large cavity synthetic method, temperature 1000-3000 ℃.30~60Mpa of pressure, minute time 20-40.
Piezoelectric layer raw material of the present invention use existing lead titanate piezoelectric ceramics raw material PZT-4.
It is an advantage of the invention that：With bionic thought, find had by the research to shell housing fracture characteristics Some works to break, about 3,000 times of work to break of calcium carbonate crystal as its fundamental component, and pass through shell housing knot Study on Microstructure, contrast and the experiment of structure are able to find why shell housing has high rigidity reason in the carbon in shell Sour calcium crystal grain has and has the fine fibre intersect, be overlapping, interlinking between special ordered arrangement and Qi Ge carbonic acid layers The bonding mode of additive.For the laminate formed with hierarchical structure, if simple with just-fine-firm structure ratio Firm-soft-firm structure there is more preferable fracture property.Adhesive is added fragile fibre silk by innovation so that adhesive has Certain fibre structure.So that fragile fibre silk forms longitude and latitude network structure in adhesive and improves structural strength.Ultimately form Interlayer is run into when crackle further develops downwards be added with fragility longitude and latitude grid fibre structure when last layer generates crackle During adhesive layer, its stress run into after along fiber mesh to lateral dispersion, while fragile material is broken in dispersion process Split and further consume energy so that longitudinal force lateral dispersion reduces the stress to next piezoelectric layer, simultaneously because fragile material Fracture further reduce the energy transmitted downwards and reach the further stress weakened to next piezoelectric layer.Reach raising The fracture property of functionally graded piezoelectric strip.Application invention method can mass produce the function ladder with high fracture property in batches Spend piezoelectric so that functionally graded piezoelectric strip has more preferable use value and is more widely applied field.
Brief description of the drawings
Fig. 1 is the structural representation of the mesh flake of elongated glass fiber establishment of the present invention；
Fig. 2 is that the mesh flake of the multiple elongated glass fiber establishments of the present invention is gradually superimposed, the schematic diagram covered successively；
Fig. 3 is the schematic diagram that the present invention prepares functionally graded piezoelectric strip；
Fig. 4 is the schematic diagram of the piezoelectric board of functionally gradient containing crackle；
Fig. 5 a are the stress σ that the present invention prepares functionally graded piezoelectric strip33Distribution map；
Fig. 5 b are the stress σ of control material group33Distribution map；
Fig. 6 a are the electric-field intensity E that the present invention prepares functionally graded piezoelectric stripyyDistribution map；
Fig. 6 b are the electric-field intensity E of control material groupyyDistribution map.
Embodiment
Embodiment 1
First, elongated glass fiber is subjected to transverse and longitudinal longitude and latitude grid establishment arrangement form mesh flake 1；
The fibre length 2mm of elongated glass fiber is taken, because filament is not easy to keep single straight when glass fibre makes Line, and the easily broken fragility of filament, so when transverse and longitudinal longitude and latitude mesh flake is made, first will on the bright and clean glass sheet plane 4 of bottom Same horizontal elongated glass fiber 101 tiles, and each elongated glass fiber keeps its spacing 0.5mm, is sprayed with sprayer to it Glass cement is spread, due to the circular cross-section of glass fiber, filametntary upside arc-shaped surface can be attached to by spraying the glass cement of wiping, respectively Though gap has glass cement and is sprayed on bright and clean glass plate between filament, due to circular-section fibers silk and glass plate Contact surface will not produce and bonding is produced because of glass cement, the separation after influenceing, herein on laying with the long glass fibers of first layer 90 degree of second layer elongated glass fiber 102 is tieed up into, second piece of bright and clean glass plate 5 is tiled into covering thereon afterwards, uses glass The weight of plate helps two layers of elongated glass fiber of transverse and longitudinal to bond, and drops back within 10 minutes from upper glass plate, elongated glass fiber The mesh flake 1 of establishment is placed on (such as Fig. 1) standby on lower glass plates；
2nd, adhesive 2 is prepared, and is made up of the raw material of following volume parts：40 parts of polyvinyl alcohol, 20 parts of glycerine, ethanol 8 Part, 20 parts of pure water, by all raw material hybrid filterings under the conditions of 80 DEG C；
The fibre length 0.2mm of short glass fiber is taken, using the short glass that 2g is added in every 100ml adhesive Filament, rocking evenly machine low speed is placed on after being added into adhesive and is shaken up, 1 revolutions per second of rocking evenly machine rotating speed；Prevent during shaking up Because Fast Collision causes glass fiber rupture failure；
3rd, functionally graded piezoelectric strip is prepared：
A lamination electric layer raw material 3 are first placed, smear the adhesive 2 shaken up on the upper strata of piezoelectric layer raw material thereafter, The mesh flake 1 that the elongated glass fiber prepared before is worked out is placed on to the top of adhesive afterwards, thereafter in elongated glass Smear the adhesive that has shaken up again above the mesh flake of glass filament establishment, back upper place place and next be laminated electric layer former material Material, adhesive, mesh flake, the piezoelectric layer raw material of the establishment of elongated glass fiber of every layer afterwards repeat operation, If when placing the mesh flake 1 of elongated glass fiber establishment single grid can not complete flood coatings, multiple mesh flakes can be made Gradually it is superimposed, is sequentially coated on previous mesh flake 1mm (such as Fig. 2), it is final to produce the functionally gradient piezoresistive material with hierarchical structure The idiosome of material is standby；
By hot pressing for functionally graded piezoelectric strip, using Static pressure high temperature large cavity synthetic method, 1000 DEG C of temperature, pressure Power 30Mpa, 20 minutes time, (such as Fig. 3)；
Piezoelectric layer raw material of the present invention use existing lead titanate piezoelectric ceramics raw material PZT-4.
Embodiment 2
First, elongated glass fiber is subjected to transverse and longitudinal longitude and latitude grid establishment arrangement form mesh flake 1：
The fibre length 6mm of elongated glass fiber is taken,
Because filament is not easy to keep single straight line, and the easily broken fragility of filament when glass fibre makes, so making During into transverse and longitudinal longitude and latitude mesh flake, first same horizontal elongated glass fiber 101 is tiled on the bright and clean glass sheet plane 4 of bottom, Each elongated glass fiber keeps its spacing 1.0mm, and glass cement is sprayed to it with sprayer, because the circle of glass fiber is cut Face, filametntary upside arc-shaped surface can be attached to by spraying the glass cement of wiping, though gap has glass cement between each filament Be sprayed on bright and clean glass plate, due to circular-section fibers silk will not produce with contact glass sheet face produced because of glass cement it is viscous Knot, the separation after influenceing；Laying and first layer long glass fibres are into 90 degree of second layer elongated glass fiber on herein 102, second piece of bright and clean glass plate 5 is tiled into covering thereon afterwards, two layers of elongated glass fibers of transverse and longitudinal are helped with the weight of glass plate Tie up silk to bond, drop back within 15 minutes and be placed on from upper glass plate, the mesh flake 1 of elongated glass fiber establishment on lower glass plates Standby (such as Fig. 1)；
2nd, adhesive 2 is prepared, and is made up of the raw material of following volume parts：45 parts of polyvinyl alcohol, 22.5 parts of glycerine, ethanol 9 Part, 25 parts of pure water, by all raw material hybrid filterings under the conditions of 88 DEG C；
The fibre length 0.5mm of short glass fiber is taken, using the short glass that 6g is added in every 100ml adhesive Filament, rocking evenly machine low speed is placed on after being added into adhesive and is shaken up, 2 revolutions per seconds of rocking evenly machine rotating speed；Prevent during shaking up Because Fast Collision causes glass fiber rupture failure；
3rd, functionally graded piezoelectric strip is prepared：
A lamination electric layer raw material 3 are first placed, smear the adhesive 2 shaken up on the upper strata of piezoelectric layer raw material thereafter, The mesh flake 1 that the elongated glass fiber prepared before is worked out is placed on to the top of adhesive afterwards, thereafter in elongated glass Smear the adhesive that has shaken up again above the mesh flake of glass filament establishment, back upper place place and next be laminated electric layer former material Material, adhesive, mesh flake, the piezoelectric layer raw material of the establishment of elongated glass fiber of every layer afterwards repeat operation, If when placing the mesh flake 1 of elongated glass fiber establishment single grid can not complete flood coatings, multiple mesh flakes can be made Gradually it is superimposed, is sequentially coated on previous mesh flake 1.5mm (such as Fig. 2), it is final to produce the functionally gradient piezoelectricity with hierarchical structure The idiosome of material is standby；
By hot pressing for functionally graded piezoelectric strip, using Static pressure high temperature large cavity synthetic method, 2000 DEG C of temperature.Pressure Power 45Mpa, 30 minutes time, (such as Fig. 3)；
Piezoelectric layer raw material of the present invention use existing lead titanate piezoelectric ceramics raw material PZT-4.
Embodiment 3
First, elongated glass fiber is subjected to transverse and longitudinal longitude and latitude grid establishment arrangement form mesh flake 1：
The fibre length 10mm of elongated glass fiber is taken,
Because filament is not easy to keep single straight line, and the easily broken fragility of filament when glass fibre makes, so making During into transverse and longitudinal longitude and latitude mesh flake, first same horizontal elongated glass fiber 101 is tiled on the bright and clean glass sheet plane 4 of bottom, Each elongated glass fiber keeps its spacing 1.5mm, and glass cement is sprayed to it with sprayer, because the circle of glass fiber is cut Face, filametntary upside arc-shaped surface can be attached to by spraying the glass cement of wiping, though gap has glass cement between each filament Be sprayed on bright and clean glass plate, due to circular-section fibers silk will not produce with contact glass sheet face produced because of glass cement it is viscous Knot, the separation after influenceing.Laying and first layer long glass fibres are into 90 degree of second layer elongated glass fiber on herein 102, second piece of bright and clean glass plate 5 is tiled into covering thereon afterwards, two layers of elongated glass fibers of transverse and longitudinal are helped with the weight of glass plate Tie up silk to bond, drop back within 20 minutes and be placed on from upper glass plate, the mesh flake 1 of elongated glass fiber establishment on lower glass plates Standby (such as Fig. 1)；
2nd, adhesive 2 is prepared, and is made up of the raw material of following volume parts：50 parts of polyvinyl alcohol, 25 parts of glycerine, ethanol 10 Part, 30 parts of pure water, by all raw material hybrid filterings under the conditions of 95 DEG C；
The fibre length 0.8mm of short glass fiber is taken, using the short glass that 10g is added in every 100ml adhesive Glass filament, rocking evenly machine low speed is placed on after being added into adhesive and is shaken up, 3 revolutions per seconds of rocking evenly machine rotating speed；Prevent from shaking up process In glass fiber rupture failure caused due to Fast Collision；
3rd, functionally graded piezoelectric strip is prepared：
A lamination electric layer raw material 3 are first placed, smear the adhesive 2 shaken up on the upper strata of piezoelectric layer raw material thereafter, The mesh flake 1 that the elongated glass fiber prepared before is worked out is placed on to the top of adhesive afterwards, thereafter in elongated glass Smear the adhesive that has shaken up again above the mesh flake of glass filament establishment, back upper place place and next be laminated electric layer former material Material, adhesive, mesh flake, the piezoelectric layer raw material of the establishment of elongated glass fiber of every layer afterwards repeat operation, If when placing the mesh flake 1 of elongated glass fiber establishment single grid can not complete flood coatings, multiple mesh flakes can be made Gradually it is superimposed, is sequentially coated on previous mesh flake 2mm (such as Fig. 2), it is final to produce the functionally gradient piezoresistive material with hierarchical structure The idiosome of material is standby；
By hot pressing for functionally graded piezoelectric strip, using Static pressure high temperature large cavity synthetic method, 3000 DEG C of temperature.Pressure Power 60Mpa, 40 minutes time.(such as Fig. 3)
Piezoelectric layer raw material of the present invention use existing lead titanate piezoelectric ceramics raw material PZT-4.
The present invention is further illustrated by specific experiment example below.
Functionally gradient PZT-4 piezoresistive material flitch, length of side a=20mm, b=10mm plate base potential are 5V, and top is given electric Gesture 5V, the upper following stress intensity of plate is σ=0.1MPa, and crack length r=1mm sets its polarised direction as x2Axle is positive.Material Graded direction be x2Axle is positive, and gradient function isWherein β is taken as 10, such as Fig. 4.
Base material parameter is:
The testing result of functionally graded piezoelectric strip prepared by this method and control group material contrasts, stress horizontal proliferation, Stress intensity reduces (such as Fig. 5 a, Fig. 5 b), and electric-field intensity reduces (such as Fig. 6 a, Fig. 6 b).It can be verified by check experiment detection Bursting stress 3-5%, dispersive stress concentrated area can be reduced by the preparation method of the present invention, electric-field intensity reduces 1-3%.

Claims (2)

1. a kind of functionally graded piezoelectric strip preparation method that can improve break resistance, it is characterised in that including following step Suddenly：
First, elongated glass fiber is subjected to transverse and longitudinal longitude and latitude grid establishment arrangement form mesh flake：
The fibre length 2-10mm of elongated glass fiber is taken, when transverse and longitudinal longitude and latitude mesh flake is made, first in the bright and clean glass of bottom Same horizontal elongated glass fiber is tiled in plate plane, each elongated glass fiber keeps its spacing 0.5-1.5mm, with spray Day with fog sprays glass cement to it, herein on laying and first layer long glass fibres into 90 degree of second layer elongated glass fibre Silk, afterwards by second piece of bright and clean glass plate tiling covering thereon, two layers of elongated glass fibre of transverse and longitudinal is helped with the weight of glass plate Silk is bonded, and 10-20 minutes drop back to be placed on lower glass plates from upper glass plate, the mesh flake of elongated glass fiber establishment It is standby；
2nd, adhesive is prepared, and is made up of the raw material of following volume parts：Polyvinyl alcohol 40-50 parts, glycerine 20-25 parts, ethanol 8-10 parts, 30 parts of pure water 20-, by all raw material hybrid filterings under the conditions of 80-95 DEG C；
The fibre length 0.2-0.8mm of short glass fiber is taken, using the short that 2-10g is added in every 100mL adhesive Glass fiber, rocking evenly machine low speed is placed on after being added into adhesive and is shaken up, 1-3 revolutions per seconds of rocking evenly machine rotating speed；
3rd, functionally graded piezoelectric strip is prepared：
A lamination electric layer raw material are first placed, smear the adhesive shaken up on the upper strata of piezoelectric layer raw material thereafter, afterwards The mesh flake that the elongated glass fiber prepared before is worked out is placed on to the top of adhesive, thereafter in elongated glass fibre Smear the adhesive that has shaken up again above the mesh flake of silk establishment, back upper place place it is next be laminated electric layer raw material, afterwards Every layer of adhesive, elongated glass fiber establishment mesh flake, piezoelectric layer raw material repeat operation, place elongated The mesh flake of glass fiber establishment（1）The single mesh flakes of Shi Ruruo can not complete flood coatings, multiple mesh flakes is gradually folded Add, be sequentially coated on previous mesh flake 1-2mm, the idiosome of final functionally graded piezoelectric strip of the generation with hierarchical structure is standby With；
By hot pressing for functionally graded piezoelectric strip, using Static pressure high temperature large cavity synthetic method, 1000-3000 DEG C of temperature, 30~60MPa of pressure, minute time 20-40.
2. a kind of functionally graded piezoelectric strip preparation method that can improve break resistance according to claim 1, its It is characterised by, described piezoelectric layer raw material use lead titanate piezoelectric ceramics raw material PZT-4.
CN201610317778.4A 2016-05-12 2016-05-12 A kind of functionally graded piezoelectric strip preparation method that can improve break resistance Expired - Fee Related CN106003849B (en)

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CN202430158U (en) * 2012-01-18 2012-09-12 广州伟一胶粘制品有限公司 Double faced adhesive tape capable of bearing force in multiple directions
CN103647021A (en) * 2013-11-26 2014-03-19 重庆中镭科技有限公司 Method for preparing piezoelectric bimorph
CN104529442A (en) * 2015-01-16 2015-04-22 河南理工大学 Non-pressure infiltration preparation process of functionally graded piezoelectric material (FGPM)

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CN1945869A (en) * 2006-10-24 2007-04-11 北京科技大学 Piezoelectric driving device of functional gradient structure and its preparing method
CN202430158U (en) * 2012-01-18 2012-09-12 广州伟一胶粘制品有限公司 Double faced adhesive tape capable of bearing force in multiple directions
CN103647021A (en) * 2013-11-26 2014-03-19 重庆中镭科技有限公司 Method for preparing piezoelectric bimorph
CN104529442A (en) * 2015-01-16 2015-04-22 河南理工大学 Non-pressure infiltration preparation process of functionally graded piezoelectric material (FGPM)

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