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 PDFInfo
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- 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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- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000003365 glass fiber Substances 0.000 claims abstract description 76
- 239000000853 adhesive Substances 0.000 claims abstract description 39
- 230000001070 adhesive effect Effects 0.000 claims abstract description 39
- 238000007731 hot pressing Methods 0.000 claims abstract description 6
- 230000003068 static effect Effects 0.000 claims abstract description 6
- 238000010189 synthetic method Methods 0.000 claims abstract description 6
- 239000011521 glass Substances 0.000 claims description 55
- 239000002994 raw material Substances 0.000 claims description 37
- 239000000835 fiber Substances 0.000 claims description 19
- 239000004568 cement Substances 0.000 claims description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 10
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- NKZSPGSOXYXWQA-UHFFFAOYSA-N dioxido(oxo)titanium;lead(2+) Chemical compound [Pb+2].[O-][Ti]([O-])=O NKZSPGSOXYXWQA-UHFFFAOYSA-N 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 235000011187 glycerol Nutrition 0.000 claims description 5
- 238000003475 lamination Methods 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 44
- 239000000463 material Substances 0.000 description 24
- 208000037656 Respiratory Sounds Diseases 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- QBUKAFSEUHGMMX-MTJSOVHGSA-N (5z)-5-[[3-(1-hydroxyethyl)thiophen-2-yl]methylidene]-10-methoxy-2,2,4-trimethyl-1h-chromeno[3,4-f]quinolin-9-ol Chemical group C1=CC=2NC(C)(C)C=C(C)C=2C2=C1C=1C(OC)=C(O)C=CC=1O\C2=C/C=1SC=CC=1C(C)O QBUKAFSEUHGMMX-MTJSOVHGSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
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- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
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- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
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- B32B9/047—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material made of fibres or filaments
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08K5/05—Alcohols; Metal alcoholates
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
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- C08K7/04—Fibres or whiskers inorganic
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
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- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J129/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Adhesives based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Adhesives based on derivatives of such polymers
- C09J129/02—Homopolymers or copolymers of unsaturated alcohols
- C09J129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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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
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.
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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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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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