CN101450860A - Electrostriction material and preparation method thereof - Google Patents
Electrostriction material and preparation method thereof Download PDFInfo
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- CN101450860A CN101450860A CNA200710178884XA CN200710178884A CN101450860A CN 101450860 A CN101450860 A CN 101450860A CN A200710178884X A CNA200710178884X A CN A200710178884XA CN 200710178884 A CN200710178884 A CN 200710178884A CN 101450860 A CN101450860 A CN 101450860A
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Abstract
The invention provides an electrostriction material and a preparation method thereof. The invention provides the electrostriction material having the advantages of good pressure resistant performance, large deformation and low consumption by using Sr element or La element to partially replace Pb in PMN and simultaneously doping Sc2O3 and adding Cr2O3 or Bi2O3, and using a low-cost production line and optimized technological conditions. The electrostriction material can be widely applied in the fields of aerospace, precision optics, precision finishing and so on with large-deformation driving and positioning.
Description
Technical field
The present invention relates to field of functional materials, specifically, relate to a kind of electrostriction material and preparation method thereof.
Background technology
Electrostriction material is a kind of ferroelectric material with electromechanical Coupling, and it can produce certain deformation under the fall out effect of external electric field.Because the mechanism of this deformation is by electrical input signal but not mechanical quantity input produces required motion, therefore can realize mechanical isolation, and since its driving power little, need not high pressure and polarize in advance, the problem of aging that does not exist polarization and depolarize to cause, therefore make electrostriction material become the ideal material of micrometric displacement device, enjoy the attention of national defence, microelectronics industry and sophisticated technology, have a wide range of applications at aspects such as Structure with Intelligent Structure System, micromechanics electronic system, microrobot, laser beam deflector, ADAPTIVE OPTICS SYSTEMSs.
Square being directly proportional of the deformation that electrostriction material produced (strain) and strength of electric field size, therefore when real work, seek out enough big dependent variable and need apply stronger electric field, this just needs material must possess good high voltage performance and low-loss.In the prior art, document Ceram.Int.2004 for example, 30:1411～1417 and Ceram.Int.2006, introduced in 32:189～194: use ultrafine powder, lead magnoniobate system (PMN) electrostriction material of prepared such as hot pressed sintering is mainly with Ba, Sr, elements such as K carry out doping vario-property, this material exists withstand voltage properties poor, the loss height, problem, in addition, because the processing condition harshness of ultrafine powder, complicated operating process, hot pressed sintering then needs the hot-press equipment of the expensive particular design of a cover, cost is very high, and they all are difficult to be applied to suitability for industrialized production at present.
Summary of the invention
The objective of the invention is to overcome that existing electrostriction material withstand voltage properties is poor, loss height and the high defective of manufacturing cost, a kind of good pressure-resistant performance, deformation quantity is big, loss is low electrostriction material are provided, and provide a kind of simple to operate, the preparation method to be preparing above-mentioned electrostriction material cheaply, thereby help realizing suitability for industrialized production.Described electrostriction material can be widely used in that large deformation drives and fields such as localized aerospace, precision optics, precision sizing.
The object of the present invention is achieved like this:
According to an aspect of the present invention, provide a kind of preparation method of electrostriction material, may further comprise the steps:
1) with PbO, TiO
2, Mg (OH)
2, Nb
2O
5, SrCO
3, La
2O
3, Sc
2O
3, Cr
2O
3, Bi
2O
3Be raw material, according to the stoichiometric ratio weighing of following composition formula:
Pb
1-αM
α(Mg
1/3Nb
2/3)
βTi
1-βO
3+ x mol%Sc
2O
3+ y mol%Lm
2O
3, wherein:
0≤α≤0.05
0.05≤β≤0.15
0<x<0.5，0<y<0.5，0<x+y≤0.5
M is Sr or La in the formula, Lm
2O
3Be Bi
2O
3Or Cr
2O
3
2) at first with Mg (OH)
2And Nb
2O
5Through 800～1000 ℃ of following 1～2.5 hour synthetic MgNb
2O
6, carry out the batch mixing ball milling with other raw materials by corresponding proportioning then, at the synthetic lead magnoniobate powder of 800～1000 ℃ of following 1～2.5 hour secondaries;
3) with step 2) the synthetic lead magnoniobate powder of the secondary that obtains is after ball milling becomes micron order once more, adds the 0.5wt% polyvinyl alcohol as the binding agent granulating and forming, then 1100～1250 ℃ down insulation carried out sintering in 1～2 hour.
Preferred 0.01≤x≤0.02,0＜y≤0.48 in described step 1) wherein, employed material purity is chemical pure, or the above raw material of chemical pure.
According to another aspect of the present invention, provide a kind of by electrostriction material that above-mentioned preparation method obtained.
In above-mentioned technical scheme, in order to test the electrical property of prepared electrostriction material, material behind sintering mill can be processed into the element of corresponding size, again the surface is polished, adopt burning infiltration silver method on said elements, to plate silver electrode then, the temperature of burning infiltration silver is 700～800 ℃, and soaking time is 1～2 hour.
In the present invention, a small amount of Sr or being substituted with of La are beneficial to the appearance of avoiding the green stone phase of disadvantageous Jiao of performance, an amount of Sc
2O
3Can improve an orderly randomness of electrostriction material internal structure, and Cr
2O
3Or Bi
2O
3Be doped with the liquid phase sintering amount that helps in burning till to introduce transition, reduce sintering temperature, crystal grain thinning, improve the homogeneity and the density of material internal structure, strengthen the anti-disruptive strength of crystal boundary, thereby improve the operating voltage of electrostriction material, and improve its creep properties.
Compare with present existing technology, the present invention has the following advantages:
1. electrostriction material deformation quantity provided by the invention is big, reaches 10
-3Magnitude can be regulated displacement easily in big stroke range, this functional design for electrostretch device provides bigger design space.
2. electrostriction material withstand voltage properties height provided by the invention, loss is low.Because the disruptive strength of this material is higher than 6kV/mm, operating voltage can reach 5kV/mm, makes it can bear bigger strength of electric field, obtains bigger deformation, thereby has improved the reliability of electrostretch device.
Therefore 3. electrostriction material of the present invention also has the characteristics of low creep properties, has effectively guaranteed the circulation ratio of displacement in actual applications, and move the location that helps carrying out better micro-displacement.
4. operational path provided by the invention, operating process is simple, easy to control, and with low cost, is applicable to suitability for industrialized production.
Description of drawings
Fig. 1 is the XRD figure spectrum of electrostriction material according to an embodiment of the invention, and it has simple uhligite phase structure.
Fig. 2 is the SEM figure of electrostriction material according to an embodiment of the invention, shows that grain growing is good, dense micro-structure.
Fig. 3 is that the electricity according to the electrostriction material of the embodiment of the invention 1～3 causes loop line figure.
Embodiment
Further specify advantage of the present invention below by embodiment, but content of the present invention is not limited thereto.
[embodiment 1]:
1) with chemical pure PbO, TiO
2, Mg (OH)
2, Nb
2O
5, SrCO
3, Sc
2O
3, Cr
2O
3Be raw material, press composition formula Pb
0.95Sr
0.05(Mg
1/3Nb
2/3)
0.1Ti
0.9O
3+ 0.01mol%Sc
2O
3+ 0.02mol% Cr
2O
3The accurate weighing of stoichiometric ratio;
2) at first with Mg (OH)
2And Nb
2O
5Be raw material, be incubated 2.5 hours synthetic MgNb down through 800～1000 ℃ earlier
2O
6, then with PbO, TiO
2, SrCO
3, Sc
2O
3, Cr
2O
3Carry out the batch mixing ball milling by corresponding proportioning, be incubated 2.5 hours synthetic lead magnoniobate powders of secondary down at 800～1000 ℃;
3) with step 2) the synthetic lead magnoniobate powder of the secondary that obtains is after ball milling becomes micron order once more, adds the 0.5wt% polyvinyl alcohol as the binding agent granulating and forming, then 1100～1250 ℃ down insulation carried out sintering in 2 hours, thereby obtain electrostriction material.
Prepared electrostriction material is ground the element that is processed into corresponding size, the surface is polished again, adopt burning infiltration silver method to plate silver electrode then, the temperature of burning infiltration silver is 700 ℃, and soaking time is 1 hour, tests its electrical property.
Table 1 is the electrical property of embodiment 1 under different condition.
Table 1
| Sintering temperature (℃) | Calcined temperature (℃) | Loss tg δ (%) | Deformation S (10 -3) (kV/mm) | The E of anti-disruptive strength the (kV/mm) |
| 1100 | 800 | 3.0 | 0.6 | ≥5.8 |
| 1200 | 900 | 2.5 | 0.6 | ≥6.2 |
| 1250 | 1000 | 3.2 | 0.4 | ≥5.2 |
[embodiment 2]:
1) with chemical pure PbO, TiO
2, Mg (OH)
2, Nb
2O
5, La
2O
3, Sc
2O
3, Bi
2O
3Be raw material, press composition formula Pb
0.98La
0.02(Mg
1/3Nb
2/3)
0.05Ti
0.95O
3+ 0.3mol%Sc
2O
3+ 0.1mol% Bi
2O
3The stoichiometric ratio weighing;
2) at first with Mg (OH)
2And Nb
2O
5Be raw material, be incubated 1.5 hours synthetic MgNb down through 850 ℃ earlier
2O
6, then with PbO, TiO
2, La
2O
3, Sc
2O
3, Bi
2O
3Carry out the batch mixing ball milling by corresponding proportioning, be incubated 1.5 hours synthetic lead magnoniobate powders of secondary down at 850 ℃;
3) with step 2) the synthetic lead magnoniobate powder of the secondary that obtains is after ball milling becomes micron order once more, adds the 0.5wt% polyvinyl alcohol as the binding agent granulating and forming, then 1200 ℃ down insulation carried out sintering in 2 hours, thereby obtain electrostriction material.
Then prepared electrostriction material is adopted the complete processing identical with embodiment 1, test its electrical property.
[embodiment 3]:
1) with chemical pure PbO, TiO
2, Mg (OH)
2, Nb
2O
5, Sc
2O
3, Cr
2O
3Be raw material, press composition formula Pb (Mg
1/3Nb
2/3)
0.15Ti
0.85O
3+ 0.02mol% Sc
2O
3+ 0.48mol%Cr
2O
3The stoichiometric ratio weighing;
2) at first with Mg (OH)
2And Nb
2O
5Be raw material, be incubated 1 hour synthetic MgNb down through 1000 ℃ earlier
2O
6, then with PbO, TiO
2, Sc
2O
3, Cr
2O
3Carry out the batch mixing ball milling by corresponding proportioning, be incubated 1 hour synthetic lead magnoniobate powder of secondary down at 1000 ℃;
3) with step 2) the synthetic lead magnoniobate powder of the secondary that obtains is after ball milling becomes micron order once more, adds the 0.5wt% polyvinyl alcohol as the binding agent granulating and forming, then 1250 ℃ down insulation carried out sintering in 1 hour, thereby obtain electrostriction material.
Then prepared electrostriction material is adopted the complete processing identical with embodiment 1, test its electrical property.
Table 2 is prescription and electrical properties thereof of embodiment 1～3.
Table 2
| Embodiment | Prescription | Loss tg δ (%) | Deformation S (10 -3) (kV/mm) | The E of anti-disruptive strength the (kV/mm) |
| 1 | Pb 0.95Sr 0.05(Mg 1/3Nb 2/3) 0.1Ti 0.9O 3+0.01mol％?Sc 2O 3+0.02mol％?Cr 2O 3 | 2.5 | 0.6 | ≥6.2 |
| 2 | Pb 0.98La 0.02(Mg 1/3Nb 2/3) 0.05Ti 0.95O 3+0.3mol％Sc 2O 3+0.1mol％Bi 2O 3 | 3.1 | 0.7 | ≥5.7 |
| 3 | Pb(Mg 1/3Nb 2/3) 0.15Ti 0.85O 3+0.02mol％?Sc 2O 3+0.48mol％?Cr 2O 3 | 3.7 | 0.8 | ≥5.6 |
Although made specific descriptions for the present invention with reference to the above embodiments, but for the person of ordinary skill of the art, should be appreciated that and can make amendment or improve based on content disclosed by the invention, and these modifications and improving all within the spirit and scope of the present invention.
Claims (4)
1. the preparation method of an electrostriction material may further comprise the steps:
1) with PbO, TiO
2, Mg (OH)
2, Nb
2O
5, SrCO
3, La
2O
3, Sc
2O
3, Cr
2O
3, Bi
2O
3Be raw material, according to the stoichiometric ratio weighing of following composition formula:
Pb
1-αM
α(Mg
1/3Nb
2/3) β Ti
1-βO
3+ x mol% Sc
2O
3+ y mol% Lm
2O
3, wherein:
0≤α≤0.05
0.05≤β≤0.15
0<x<0.5，0<y<0.5，0<x+y≤0.5
M is Sr or La in the formula, Lm
2O
3Be Bi
2O
3Or Cr
2O
3
2) at first with Mg (OH)
2And Nb
2O
5Through 800～1000 ℃ of following 1～2.5 hour synthetic MgNb
2O
6, carry out the batch mixing ball milling with other raw materials by corresponding proportioning then, at the synthetic lead magnoniobate powder of 800～1000 ℃ of following 1～2.5 hour secondaries;
3) with step 2) the synthetic lead magnoniobate powder of the secondary that obtains is after ball milling becomes micron order once more, adds the 0.5wt% polyvinyl alcohol as the binding agent granulating and forming, then 1100～1250 ℃ down insulation carried out sintering in 1～3 hour.
2. the preparation method of electrostriction material according to claim 1 is characterized in that: 0.01≤x in described step 1)≤0.02,0＜y≤0.48.
3. the preparation method of electrostriction material according to claim 1, it is characterized in that: in described step 1), employed material purity is chemical pure, or the above raw material of chemical pure.
4. electrostriction material that obtains according to claim 1,2 or 3 described preparation methods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710178884XA CN101450860A (en) | 2007-12-06 | 2007-12-06 | Electrostriction material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710178884XA CN101450860A (en) | 2007-12-06 | 2007-12-06 | Electrostriction material and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101450860A true CN101450860A (en) | 2009-06-10 |
Family
ID=40733368
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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| Country | Link |
|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2453518C2 (en) * | 2010-09-23 | 2012-06-20 | Открытое акционерное общество "Научно-исследовательский институт "Элпа" с опытным производством" (ОАО "НИИ "Элпа") | Piezoceramic material |
| CN109443230A (en) * | 2018-12-17 | 2019-03-08 | 东莞理工学院 | A kind of piezoelectric ceramics measuring system based on image procossing |
-
2007
- 2007-12-06 CN CNA200710178884XA patent/CN101450860A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2453518C2 (en) * | 2010-09-23 | 2012-06-20 | Открытое акционерное общество "Научно-исследовательский институт "Элпа" с опытным производством" (ОАО "НИИ "Элпа") | Piezoceramic material |
| CN109443230A (en) * | 2018-12-17 | 2019-03-08 | 东莞理工学院 | A kind of piezoelectric ceramics measuring system based on image procossing |
| CN109443230B (en) * | 2018-12-17 | 2021-01-12 | 东莞理工学院 | Piezoelectric ceramic measuring system based on image processing |
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Open date: 20090610 |