CN108947524A - Bismuth-sodium titanate base piezoelectric lead-free ceramics material and its preparation method and application - Google Patents

Bismuth-sodium titanate base piezoelectric lead-free ceramics material and its preparation method and application Download PDF

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CN108947524A
CN108947524A CN201811017614.5A CN201811017614A CN108947524A CN 108947524 A CN108947524 A CN 108947524A CN 201811017614 A CN201811017614 A CN 201811017614A CN 108947524 A CN108947524 A CN 108947524A
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bismuth
sodium titanate
titanate base
base piezoelectric
ceramics material
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徐志军
初瑞清
贺笑春
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Yantai University
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Abstract

The present invention provides a kind of bismuth-sodium titanate base piezoelectric lead-free ceramics materials, are related to piezoelectric/electrostrictive porcelain technical field.Bismuth-sodium titanate base piezoelectric lead-free ceramics materials chemistry composition are as follows: (1-x)(Bi0.5Na0.5)0.935Ba0.065Ti0.985(Fe0.5Sb0.5)0.015O3‑xSrFeCo0.5Oy, wherein x=0.000 ~ 0.015.Bismuth-sodium titanate base piezoelectric lead-free ceramics material provided by the invention had both had high piezoelectric constant d33(> 200pC/N), and there is high electrostriction coefficient Q33(> 0.02m4/C2), and harmful elements Pb is free of in material, meet the requirement of environmentally friendly material, has good application prospect in fields such as energy converter, driver and high accuracy displacement sensors.

Description

Bismuth-sodium titanate base piezoelectric lead-free ceramics material and preparation method thereof and Using
Technical field
The present invention relates to piezoelectric/electrostrictive porcelain technical field, more particularly, to a kind of bismuth-sodium titanate base piezoelectricity/electroluminescent Flexible lead-free ceramics material and its preparation method and application.
Background technique
In the Mechatronic Systems and device of automatic control, driver is often the most key factor for limiting its performance and service life One of.And in numerous drivers, piezoelectric driver is low with price because its response is fast, bearing capacity is high, low energy consumption The features such as and be concerned.Piezoelectric driver has been successfully applied to optics, aerospace, precision positioning at present Etc. various fields, and forming the industry having a high potential.
The electrostriction material being widely used at present is lead based relaxor ferroelectric material, including Pb (Zn1/3Nb2/3)O3(PZN) (Fan Huiqing, Yu Lijun, Zhang Liangying, Yao Xi, the electrostrictive properties and Polarization Mechanism of lead zinc niobate base ceramics, investigation of materials Report .1997,11 (05): 543-546.) and Pb (Mg1/3Nb2/3)O3(PMN) (J.Kuwata, K.Uchino, S.Nomura, Electrostrictive coefficients of Pb(Mg1/3Nb2/3)O3 ceramics, Jpn. J. Appl. Phys.1980,19:2099-2103) etc., but PbO is a kind of highly toxic material, directly endangers the health of the mankind.Closely Nian Lai researches and develops the electricity of novel environmental friendly with the enhancing of environmental protection consciousness and the demand of human social Telescopic material is caused to have become one of hot spot.
BNT base lead-free ferroelectric material has relaxation property similar to lead based relaxor ferroelectric, therefore the material system is potential High electrostrictive property causes the extensive concern of researchers.Currently, researcher has found BNT-BT-KNN ternary pottery Porcelain body system responds with high electric field induced strain, and under 80kV/cm driving electric field, the strain value of material has reached 0.45%(S.T. Zhang, A.B. Kounga, E. Aulbach H. Ehrenberg, J. Rödel, Giant strain in lead- free piezoceramics Bi0.5Na0.5TiO3-BaTiO3-K0.5Na0.5NbO3 system, Appl. Phys. Lett. 2007,91:112906.)；Pass through appropriate Ta2O5BNT-BT component is adulterated, larger electric field induced strain value 0.35% is obtained (R.Z. Zuo, C Ye, X.S. Fang, J.L. Tang. Tantalum doped 0.94Bi0.5Na0.5TiO3- 0.06BaTiO3 piezoelectric ceramics, J. Eur. Ceram. Soc.2008,28:871-877.)；It is logical The variation for crossing adjustment A Bi, Na constituent contents of BNT-BT binary system, obtains the material that can be compared favourably with lead base antiferroelectric materials Material formula (Y.P. Guo, M.Y. Gu, H.S. Luo, Y. Liu, R.L. Withers, Composition-induced antiferroelectric phase and giant strain in lead-free (Na y ,Bi z )Ti1-x O3(1-x)-xBaTiO3 ceramics, Phys. Rew. B2011,83:054118.)；It was found that BNT-BKT-KNN system is with huge Big temperature-induced electric field induced strain responds (K.T.P. Seifert, W. Jo, J. R del, Temperature- insensitive large strain of (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3-(K0.5Na0.5)NbO3 lead- free Piezoceramics, J. Am. Ceram. Soc.2010,93:1392-1396.)；In BNT-BKT-ST ceramics Obtained in material under low driving electric field Large strain amount 0.36% (60kV/cm) (K. Wang, A. Hussain, W. Jo, J. Rödel. Temperature-dependent properties of (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3- SrTiO3Lead-free piezoceramics. J. Am. Ceram. Soc. 2012,95:2241-2247.).But it closes When BNT base big electric field induced strain phenomenal research, due to the enhancing of structural symmetry, researchers are all without reporting corresponding material The piezoelectric property of material.
Summary of the invention
The first object of the present invention is that providing one kind not only has high electric field induced strain, but also with preferable piezoelectric property Bismuth-sodium titanate base piezoelectric lead-free ceramics material.
Bismuth-sodium titanate base piezoelectric lead-free ceramics material provided by the invention, the chemical group of the ceramic material Become:
(1-x)(Bi0.5Na0.5)0.935Ba0.065Ti0.985(Fe0.5Sb0.5)0.015O3-xSrFeCo0.5Oy, wherein x=0.000 ~ 0.015, preferably 0.002 ~ 0.012.
The second object of the present invention is to provide a kind of preparation of bismuth-sodium titanate base piezoelectric lead-free ceramics material Method, this method is easy to operate, and energy consumption is small, and the bismuth-sodium titanate base piezoelectric lead-free ceramics material being prepared both had There is high electric field induced strain, and there is preferable piezoelectric property.
The preparation method of bismuth-sodium titanate base piezoelectric lead-free ceramics material provided by the invention, using citric acid Bismuth-sodium titanate base piezoelectric lead-free ceramics material is prepared in Complexing Sol-Gel Method and two step of solid-phase synthesis.
Further, include the following steps:
(a) strontium nitrate, cobalt nitrate, ferric nitrate are dissolved in dehydrated alcohol, citric acid is dissolved in deionized water, by strontium, cobalt, iron Ethanol solution mixed with the aqueous solution of citric acid, drying, calcining obtain SrFeCo0.5OyPowder body material；
(b) sodium carbonate, barium carbonate, di-iron trioxide, antimony oxide, titanium dioxide, bismuth oxide and the step (a) are prepared SrFeCo0.5OyMixing, through ball milling, drying, molding and sintering obtain bismuth-sodium titanate base piezoelectric lead-free ceramics material Material.
Further, in the step (a), xerogel is obtained after the drying, the drying temperature is 80-90 DEG C, excellent It is selected as 85 DEG C；The drying time is 20-30h, preferably for 24 hours.
Further, in the step (a), the calcination temperature is 800-900 DEG C, preferably 850 DEG C；When the calcining Between be 2-5h, preferably 3h.
Further, in the step (b), the briquetting pressure is 100~200MPa, preferably 150MPa.
Further, in the step (b), the sintering temperature is 950-1100 DEG C, preferably 1050 DEG C.
Further, in the step (b), the Ball-milling Time is 6-9h, preferably 8h.
Further, the SrFeCo0.5OyIt is prepared by citric acid complex sol-gel method, prepares the network of citric acid solution Mixture/nitrate anion molar ratio is that m=0.40 ~ 0.80 is preferably m=0.60, wherein m=n (COOH)-/n(NO3)-。
The third object of the present invention is to provide a kind of bismuth-sodium titanate base piezoelectric lead-free ceramics material and is manufacturing Application in energy converter, driver or high accuracy displacement sensor.
Above-mentioned bismuth-sodium titanate base piezoelectric lead-free ceramics material provided by the invention or the preparation of above-mentioned preparation method Obtained bismuth-sodium titanate base piezoelectric lead-free ceramics material is in manufacture energy converter, driver or high precision displacement sensing Application in device.
The present invention is with (Fe0.5Sb0.5) compound ion doping vario-property BNT sill (Bi0.5Na0.5)0.935 Ba0.065Ti0.985(Fe0.5Sb0.5)0.015O3For matrix, the SrFeCo with pure perovskite structure is then added0.5OyConstitute solid solution Body (1-x)(Bi0.5Na0.5)0.935Ba0.065Ti0.985(Fe0.5Sb0.5)0.015O3- xSrFeCo0.5Oy.By to new solid solution Design is made every effort to obtain the piezoelectric lead-free ceramics material that there is big electric field induced strain and high pressure electrically to coexist, can be answered In the fields such as energy converter, driver.
The present invention obtains Shandong Province's emphasis research and development plan (2017GGX202008), state key research and development plan The subsidy of (2016YFB0402701), Shandong Province's Natural Science Fund In The Light (ZR2016EMM02), the patent that the present invention is formed are above-mentioned One of research achievement of project, and compared with prior art, the invention has the following advantages:
Bismuth-sodium titanate base piezoelectric lead-free ceramics material provided by the invention had both had high piezoelectric constant d33(> 200pC/N), and there is high electrostriction coefficient Q33(> 0.02m4/C2), and harmful elements Pb is free of in material, meet ring The requirement of border friendly material has good application prospect in fields such as energy converter, driver and high accuracy displacement sensors.
The preparation method of bismuth-sodium titanate base piezoelectric lead-free ceramics material provided by the invention uses citric acid network Sol-gel method and solid-phase synthesis are closed, this method is easy to operate, and energy consumption is small, and the principal crystalline phase for the ceramic material being prepared is Perovskite Phase, in x=0.002 ~ 0.012 section, ceramic material had not only had a good piezoelectric property, but also with higher electroluminescent answered Become characteristic, piezoelectric constant d33> 200pC/N, electrostriction coefficient Q33> 0.02m4/C2, realize analogous with lead base ceramics Leadless piezoelectric/electrostriction ceramics.
The present invention had both had high piezoelectric constant d using bismuth-sodium titanate base piezoelectric lead-free ceramics material33(> 200pC/N), and there is high electrostriction coefficient Q33(> 0.02m4/C2), and harmful elements Pb is free of in material, meet ring The requirement of border friendly material.Bismuth-sodium titanate base piezoelectric lead-free ceramics material can be applied in energy converter, driver And the fields such as high accuracy displacement sensor, it has a good application prospect.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is XRD spectrum of the embodiment one to three sample of embodiment, in which: x=0.004 is sample in embodiment one XRD spectrum；X=0.008 is the XRD spectrum of sample in embodiment two；X=0.012 is the XRD spectrum of sample in embodiment three；
Fig. 2 is two-way electric field induced strain curve (A) and the unidirectional electric field induced strain curve (B) of two sample of embodiment.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention. The person that is not specified actual conditions in embodiment, carries out according to conventional conditions or manufacturer's recommended conditions.Agents useful for same or instrument are not Production firm person is indicated, is the conventional products that can be obtained by commercially available purchase.
According to the first aspect of the invention, the present invention provides a kind of unleaded potteries of bismuth-sodium titanate base piezoelectric Ceramic material, the chemical composition of the ceramic material are as follows:
(1-x)(Bi0.5Na0.5)0.935Ba0.065Ti0.985(Fe0.5Sb0.5)0.015O3-xSrFeCo0.5Oy, wherein x=0.000 ~ 0.015, preferably 0.002 ~ 0.012.
Bismuth-sodium titanate base piezoelectric lead-free ceramics material provided by the invention had both had high piezoelectric constant d33 (> 200pC/N), and there is high electrostriction coefficient Q33(> 0.02m4/C2), and harmful elements Pb is free of in material, meet The requirement of environmentally friendly material has good application prospect in fields such as energy converter, driver and high accuracy displacement sensors.
According to the second aspect of the invention, the present invention provides a kind of bismuth-sodium titanate base piezoelectricity/electricity provided by the invention The preparation method for causing flexible lead-free ceramics material, is prepared into using citric acid complex sol-gel method and two step of solid-phase synthesis To bismuth-sodium titanate base piezoelectric lead-free ceramics material.
The preparation method of bismuth-sodium titanate base piezoelectric lead-free ceramics material provided by the invention uses citric acid network Sol-gel method and solid-phase synthesis are closed, this method is easy to operate, and energy consumption is small, and the principal crystalline phase for the ceramic material being prepared is Perovskite Phase, in x=0.002 ~ 0.012 section, ceramic material had not only had a good piezoelectric property, but also with higher electroluminescent answered Become characteristic, piezoelectric constant d33> 200pC/N, electrostriction coefficient Q33> 0.02m4/C2, realize analogous with lead base ceramics Leadless piezoelectric/electrostriction ceramics.
In one preferred embodiment, include the following steps:
(a) strontium nitrate, cobalt nitrate, ferric nitrate are dissolved in dehydrated alcohol, citric acid is dissolved in deionized water, by strontium, cobalt, iron Ethanol solution mixed with the aqueous solution of citric acid, drying, sintering obtain SrFeCo0.5OyPowder body material；
(b) sodium carbonate, barium carbonate, di-iron trioxide, antimony oxide, titanium dioxide, bismuth oxide and the step (a) are prepared SrFeCo0.5OyMixing, through ball milling, drying, molding and sintering obtain bismuth-sodium titanate base piezoelectric lead-free ceramics material Material.
In one preferred embodiment, in the step (a), xerogel, the drying temperature are obtained after the drying Degree is 80-90 DEG C, preferably 85 DEG C；The drying time is 20-30h, preferably for 24 hours.
In one preferred embodiment, in the step (a), the sintering temperature is 800-900 DEG C, preferably 850℃；The sintering time is 2-5h, preferably 3h.
In one preferred embodiment, in the step (b), the briquetting pressure is 100~200MPa, preferably 150MPa。
In one preferred embodiment, in the step (b), the sintering temperature is 950-1100 DEG C, preferably 1050℃。
In one preferred embodiment, in the step (b), the Ball-milling Time is 6-9h, preferably 8h.
In one preferred embodiment, the SrFeCo0.5OyIt is prepared, is prepared by citric acid complex sol-gel method The complexing agent of citric acid solution/nitrate anion molar ratio is that x=0.40 ~ 0.80 is preferably x=0.60, wherein x=n (COOH)-/n (NO3)-。
The third object of the present invention is to provide a kind of bismuth-sodium titanate base piezoelectric lead-free ceramics material and is manufacturing Application in energy converter, driver or high accuracy displacement sensor.
The present invention had both had high piezoelectric constant d using bismuth-sodium titanate base piezoelectric lead-free ceramics material33(> 200pC/N), and there is high electrostriction coefficient Q33(> 0.02m4/C2), and harmful elements Pb is free of in material, meet ring The good characteristic of the requirement of border friendly material applies bismuth-sodium titanate base piezoelectric lead-free ceramics material in transducing There is good application prospect in the fields such as device, driver and high accuracy displacement sensor.
In order to facilitate the clearer understanding present invention, below in conjunction with embodiment and comparative example to technical side of the invention Case is described further.
In various embodiments of the present invention in embodiment, require first to synthesize perovskite knot with citric acid complex sol-gel method The SrFeCo of structure0.5OyPowder body material.Specific synthetic method is as follows:
With chemical pure or analytically pure Sr (NO3)2、Co(NO3)2·6H2O and Fe (NO3)3·9H2O、C6H8O7×H2O, anhydrous second Pure and mild deionized water is raw material, by SrFeCo0.5Oy(since this material is easily formed Lacking oxygen, international practice is the content of O Indicated with variable y) stoichiometric ratio weigh, by citric acid complex sol-gel method progress ingredient, the raw material nothing that will be weighed up Water-ethanol dissolution, then mix to form solution with the citric acid solution prepared, this solution is put in baking oven and is dried, 85 DEG C drying for 24 hours, forms xerogel, calcines xerogel is levigate, in 850 DEG C of calcining 3h, that is, form required perovskite knot Structure SrFeCo0.5OyPowder body material.
Embodiment one
Present embodiments provide a kind of bismuth-sodium titanate base piezoelectricity-electrostriction lead-free ceramics material, the chemical composition of ceramic material Are as follows:
(1-x)(Bi0.5Na0.5)0.935Ba0.065Ti0.985(Fe0.5Sb0.5)0.015O3-xSrFeCo0.5Oy, whereinx=0.004。
The preparation method of bismuth-sodium titanate base piezoelectric lead-free ceramics material provided in this embodiment, including it is as follows Step:
With chemical pure or analytically pure Na2CO3、BaCO3、Fe2O3、Sb2O3、TiO2、Bi2O3And SrFeCo0.5OyFor raw material, presses and change Measure ratio weighing, and (assuming that the present embodiment synthesis final product is 0.2mol, then the molal quantity of required each raw material is respectively Na2CO3 / BaCO3/ Fe2O3/ Sb2O3/ TiO2/ Bi2O3/ SrFeCo0.5Oy= 0.046563 / 0.012948 / 0.000747 / 0.000747 / 0.196212 / 0.046563 / 0.008；The calculating of following embodiment chinese raw materials and weigh step all with This is identical), routinely solid-phase synthesis carries out ingredient, and ball milling mixing 8h is dry, molding, 1050 DEG C of sintered heat insulating 3h are formed Bismuth-sodium titanate base piezoelectric lead-free ceramics material.
By silver electrode after being cleaned by ultrasonic to the bismuth-sodium titanate base piezoelectric lead-free ceramics material of acquisition.At room temperature Test the electrostriction coefficient of fresh sample；With the condition polarization 30min of 8kV/mm in silicone oil, ceramics sample is then tested Piezoelectric property parameters.
Fig. 1 gives the XRD spectrum of gained sample, it is seen that material is single perovskite phase structure.
Embodiment two
Present embodiments provide a kind of bismuth-sodium titanate base piezoelectric lead-free ceramics material, the chemical composition of ceramic material Are as follows:
(1-x)(Bi0.5Na0.5)0.935Ba0.065Ti0.985(Fe0.5Sb0.5)0.015O3-xSrFeCo0.5Oy, whereinx=0.008。
With chemical pure or analytically pure Na2CO3、BaCO3、Fe2O3、Sb2O3、TiO2、Bi2O3And SrFeCo0.5OyFor raw material, It stoichiometrically weighs, routinely solid-phase synthesis carries out ingredient, and ball milling mixing 8h is dry, molding, 1050 DEG C of sintered heat insulatings 3h forms bismuth-sodium titanate base piezoelectric lead-free ceramics material.
By silver electrode after being cleaned by ultrasonic to the bismuth-sodium titanate base piezoelectric lead-free ceramics material of acquisition.At room temperature Test the electrostriction coefficient of fresh sample；With the condition polarization 30min of 8kV/mm in silicone oil, ceramics sample is then tested Piezoelectric property parameters.
Fig. 1 gives the XRD spectrum of gained sample, it is seen that material is single perovskite phase structure.Fig. 2 gives gained sample The two-way electric field induced strain curve (A) of product and unidirectional electric field induced strain curve (B).
Embodiment three
Present embodiments provide a kind of bismuth-sodium titanate base piezoelectric lead-free ceramics material, the chemical composition of ceramic material Are as follows:
(1-x)(Bi0.5Na0.5)0.935Ba0.065Ti0.985(Fe0.5Sb0.5)0.015O3-xSrFeCo0.5Oy, whereinx=0.012。
With chemical pure or analytically pure Na2CO3、BaCO3、Fe2O3、Sb2O3、TiO2、Bi2O3And SrFeCo0.5OyFor raw material, It stoichiometrically weighs, routinely solid-phase synthesis carries out ingredient, and ball milling mixing 8h is dry, molding, 1050 DEG C of sintered heat insulatings 3h forms bismuth-sodium titanate base piezoelectric lead-free ceramics material.
By silver electrode after being cleaned by ultrasonic to the bismuth-sodium titanate base piezoelectric lead-free ceramics material of acquisition.At room temperature Test the electrostriction coefficient of fresh sample；With the condition polarization 30min of 8kV/mm in silicone oil, ceramics sample is then tested Piezoelectric property parameters.
Fig. 1 gives the XRD spectrum of gained sample, it is seen that material is single perovskite phase structure.
The electric property table of each embodiment sample, as shown in table 1.
Each embodiment performance table of table 1
x d33(pC/N) S(%) Q33(m4/C2)
0.04 223 0.30 0.02
0.08 205 0.36 0.025
0.12 211 0.32 0.022
As shown in Table 1, the electric property of a sample of the embodiment of the present invention, piezoelectric constantd 33=223pC/N；80kV/cm's Under electric field, electric field induced strain parameter S=0.30%；Electrostriction coefficientQ 33=0.02m4/C2., the electricity of two sample of the embodiment of the present invention Performance, piezoelectric constantd 33=205pC/N；Under the electric field of 80kV/cm, electric field induced strain parameter S=0.36%；Electrostriction coefficientQ 33=0.025m4/C2., the electric property of three sample of the embodiment of the present invention, piezoelectric constantd 33=211pC/N；80kV/cm's Under electric field, electric field induced strain parameter S=0.32%；Electrostriction coefficientQ 33=0.022m4/C2.Illustrate bismuth titanates provided by the invention Sodium base piezoelectric lead-free ceramics material had both had high piezoelectric constant d33(> 200pC/N), and electroluminescent stretched with high Contracting coefficient Q33(> 0.02m4/C2), and harmful elements Pb is free of in material, meet the requirement of environmentally friendly material, in transducing There is good application prospect in the fields such as device, driver and high accuracy displacement sensor.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution The range of scheme.

Claims (10)

1. a kind of bismuth-sodium titanate base piezoelectric lead-free ceramics material, which is characterized in that the chemical group of the ceramic material Become:
(1-x)(Bi0.5Na0.5)0.935Ba0.065Ti0.985(Fe0.5Sb0.5)0.015O3-xSrFeCo0.5Oy, wherein x=0.000 ~ 0.015, preferably 0.002 ~ 0.012.
2. a kind of method for preparing bismuth-sodium titanate base piezoelectric lead-free ceramics material described in claim 1, feature It is, bismuth-sodium titanate base piezoelectric is prepared using citric acid complex sol-gel method and two step of solid-phase synthesis Lead-free ceramics material.
3. the preparation method of bismuth-sodium titanate base piezoelectric lead-free ceramics material according to claim 2, feature It is, includes the following steps:
(a) by chemical pure or analytically pure Sr (NO3)2、 Co(NO3)2·6H2O and Fe (NO3)3·9H2O is dissolved in dehydrated alcohol In, citric acid is dissolved in deionized water, strontium salt, cobalt salt, the ethanol solution of molysite are mixed with the aqueous solution of citric acid, Drying, calcining obtain SrFeCo0.5OyPowder body material；
(b) sodium carbonate, barium carbonate, di-iron trioxide, antimony oxide, titanium dioxide, bismuth oxide and the step (a) are prepared SrFeCo0.5OyMixing, through ball milling, drying, molding and sintering obtain bismuth-sodium titanate base piezoelectric lead-free ceramics material Material.
4. the preparation method of bismuth-sodium titanate base piezoelectric lead-free ceramics material according to claim 3, feature It is, in the step (a), xerogel is obtained after the drying, the drying temperature is 80-90 DEG C, preferably 85 DEG C；It is described Drying time is 20-30h, preferably for 24 hours.
5. the preparation method of bismuth-sodium titanate base piezoelectric lead-free ceramics material according to claim 3, feature It is, in the step (a), the calcination temperature is 800-900 DEG C, preferably 850 DEG C；The calcination time is 2-5h, excellent It is selected as 3h.
6. the preparation method of bismuth-sodium titanate base piezoelectric lead-free ceramics material according to claim 3, feature It is, in the step (b), the briquetting pressure is 100~200MPa, preferably 150MPa.
7. the preparation method of bismuth-sodium titanate base piezoelectric lead-free ceramics material according to claim 3, feature It is, in the step (b), the sintering temperature is 950-1100 DEG C, preferably 1050 DEG C.
8. the preparation method of bismuth-sodium titanate base piezoelectric lead-free ceramics material according to claim 3, feature It is, in the step (b), the Ball-milling Time is 6-9h, preferably 8h.
9. the preparation method of bismuth-sodium titanate base piezoelectric lead-free ceramics material according to claim 1, feature It is, the SrFeCo0.5OyIt is prepared by citric acid complex sol-gel method, prepares complexing agent/nitrate anion of citric acid solution Molar ratio is m=0.40 ~ 0.80, preferably m=0.60, wherein m=n (COOH)-/n(NO3)-。
10. a kind of bismuth-sodium titanate base piezoelectric lead-free ceramics material as described in claim 1 or claim 2-9 The bismuth-sodium titanate base piezoelectric lead-free ceramics material that described in any item preparation methods are prepared is in manufacture transducing Application in device, driver or high accuracy displacement sensor.
CN201811017614.5A 2018-09-01 2018-09-01 Bismuth-sodium titanate base piezoelectric lead-free ceramics material and its preparation method and application Pending CN108947524A (en)

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CN102633503A (en) * 2012-03-23 2012-08-15 上海师范大学 High-electrostriction sodium-bismuth-titanate-base lead-free piezoelectric material and preparation method thereof
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CN102633503A (en) * 2012-03-23 2012-08-15 上海师范大学 High-electrostriction sodium-bismuth-titanate-base lead-free piezoelectric material and preparation method thereof
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Application publication date: 20181207