CN112028624B - BNT-based energy storage ceramic material and preparation method and application thereof - Google Patents
BNT-based energy storage ceramic material and preparation method and application thereof Download PDFInfo
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- 238000004146 energy storage Methods 0.000 title claims abstract description 34
- 229910010293 ceramic material Inorganic materials 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims description 6
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims description 28
- 238000005245 sintering Methods 0.000 claims description 20
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 19
- 229910052709 silver Inorganic materials 0.000 claims description 19
- 239000004332 silver Substances 0.000 claims description 19
- 235000015895 biscuits Nutrition 0.000 claims description 14
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 11
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 11
- 238000000227 grinding Methods 0.000 claims description 7
- 238000010532 solid phase synthesis reaction Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 abstract description 33
- 230000015556 catabolic process Effects 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000005621 ferroelectricity Effects 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 17
- 238000000498 ball milling Methods 0.000 description 16
- 238000010438 heat treatment Methods 0.000 description 12
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 8
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 8
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 description 8
- 239000013078 crystal Substances 0.000 description 8
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Chemical compound O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 description 8
- 229910052726 zirconium Inorganic materials 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- HYXGAEYDKFCVMU-UHFFFAOYSA-N scandium(III) oxide Inorganic materials O=[Sc]O[Sc]=O HYXGAEYDKFCVMU-UHFFFAOYSA-N 0.000 description 5
- LEDMRZGFZIAGGB-UHFFFAOYSA-L strontium carbonate Chemical compound [Sr+2].[O-]C([O-])=O LEDMRZGFZIAGGB-UHFFFAOYSA-L 0.000 description 5
- 229910000018 strontium carbonate Inorganic materials 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 229910052593 corundum Inorganic materials 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000001493 electron microscopy Methods 0.000 description 4
- 238000005469 granulation Methods 0.000 description 4
- 230000003179 granulation Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000005498 polishing Methods 0.000 description 4
- 238000007873 sieving Methods 0.000 description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 2
- 241000486661 Ceramica Species 0.000 description 1
- 208000008589 Obesity Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 235000020824 obesity Nutrition 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses a BNT-based energy storage ceramicMaterial, method for its production and use, its component (Bi)0.5Na0.5Ti0.95Al0.025Nb0.025O3)1‑x(SrSc0.5Nb0.5O3)xWherein the value range of x is 0-0.15. The material can obtain large energy storage density in the value range, the energy storage efficiency can reach 75.36 percent, and the energy storage strength W isrecCan reach 2.37J/cm. By doping, the compactness of a sample is increased, the defects are eliminated, the breakdown-resistant field intensity Eb is improved, and the BNT-BAN based ceramic has high energy storage efficiency and ferroelectricity.
Description
Technical Field
The invention belongs to the field of functional ceramics, and particularly relates to a BNT-based energy storage ceramic material, and a preparation method and application thereof.
Background
BNT is one of the lead-free energy storage ceramics that has been extensively studied in the last 20 years. The research content mainly focuses on reducing the preparation defects and improving the breakdown electric field. The ferroelectric property of the BNT is strong, but the pure BNT is difficult to sinter into a compact sample, and Eb is low due to a plurality of defects, so that the BNT is difficult to be used as an energy storage medium at present. The design ideas of the material system are divided into two types at present: one is that the RNPs are replaced by A, B-site doping, which is mainly characterized in that the ferroelectric domains of the RNPs are relatively large, and Pr is low after discharge is completed, so that more energy is released; on the other hand, the compactness of the product is improved by adding the sintering aid, so that higher W is obtainedrecTo improve its energy storage efficiency. However, both designs have their drawbacks: A. the substitution of RNPs by doping at the B site can reduce Pr, but the compactness of a sample is difficult to improve; and the addition of the sintering aid to improve the compactness of the sample is difficult to reduce the Pr.
The high energy storage density ceramic is a key material for manufacturing small and large-capacity capacitors, and has the advantages of high charging and discharging speed, strong cyclic aging resistance, stable performance under extreme conditions of high temperature, high voltage and the like, and has wide application prospects in the technical fields of basic research and engineering such as electric automobiles, high-power electronic devices, pulse power supplies, new energy sources, smart grid systems and the like.
Disclosure of Invention
Aiming at the problem that Pr cannot be reduced and the compactness of a sample cannot be improved at the same time, the invention provides a BNT-based energy storage ceramic material and a preparation method thereof, and the BNT-based energy storage ceramic material has high energy storage density, low dielectric loss, large breakdown strength and high temperature stability.
In order to achieve the purpose, the technical scheme of the invention is as follows:
BNT-based energy storage ceramic material added with SrSc0.5Nb0.5O3The BNT-based energy storage ceramic material comprises the following raw materials in percentage by mole: (Bi)0.5Na0.5Ti0.95Al0.025O3)1-x(SrSc0.5Nb0.5O3)xWherein x is 0-0.15.
A method for preparing a BNT-based energy storage ceramic material, the method comprising: synthesized by solid phase method (Bi)0.5Na0.5Ti0.95Al0.025O3)1-x(SrSc0.5Nb0.5O3)xGrinding the prepared powder, adding an adhesive, granulating, pressing and forming to obtain a biscuit, and placing at 600-650 ℃ to remove the adhesive; and finally, placing the blank body in a 1120-1150 ℃ sintering furnace, and preserving heat for 2-4 hours to finally obtain a sample.
Furthermore, the adhesive is polyvinyl alcohol, and the addition amount of the adhesive is 3-7% of the mass of the prepared powder.
Furthermore, when the adhesive in the biscuit is removed, the temperature is controlled between 600 ℃ and 650 ℃, the heat is preserved for 2 to 4 hours, and the temperature rising speed is kept stable between 3 ℃ and 5 ℃ per minute.
The BNT-based energy storage ceramic material is applied by grinding the ceramic material into an ideal size, covering a dot silver electrode on one side of the ceramic material, wherein the area of the dot silver electrode is 0.0314cm2And the back surface is covered with a full silver electrode to obtain the energy storage component.
Compared with the prior art, the invention has the beneficial effects that:
1. nb added in the invention2O5、SrCO3、Sc2O3(SSN) combinations, both applied in binary systems, have not been used in ternary systems; the ternary system is added into a BNT base to form the ternary system, which is a key for improving the performance of the product designed by the design, and the performance is obviously improved after the problems that the ternary system is difficult to prepare the tablet, sinter and the like are overcome.
2. The two-step sintering method provided by the invention is characterized in that the density of a sample is increased by high-temperature sintering in the first step, the pores in the sample are eliminated by low-temperature long-time sintering in the second step, and finally, the crystal grains reach the nanometer level. Compared with the sample prepared by the traditional solid phase synthesis method, the sample has more compact and compact crystal grains (micron level). The sample prepared by the two-step sintering method has the advantages of obviously reduced air holes, greatly improved density and over 50 percent of energy storage efficiency.
3. The silver paste covering method provided by the invention is a novel method improved based on the traditional double-sided full-coating method; one side of the sample is fully coated, and the other side is only coated with 0.0314cm2The fixed area can effectively avoid the defects of the sample during the test.
Drawings
FIG. 1 shows Bi obtained in example 1 of the present invention0.5Na0.5Ti0.95Al0.025O3Electron microscopy pictures of ceramic samples.
FIG. 2 shows Bi obtained in example 1 of the present invention0.5Na0.5Ti0.95Al0.025O3Hysteresis loop of ceramic at room temperature.
FIG. 3 is 0.95 (Bi) obtained in example 2 of the present invention0.5Na0.5Ti0.95Al0.025O3)-0.05(SrSc0.5Nb0.5O3) Electron microscopy pictures of ceramic samples.
FIG. 4 is 0.95 (Bi) obtained in example 2 of the present invention0.5Na0.5Ti0.95Al0.025O3)-0.05(SrSc0.5Nb0.5O3) Hysteresis loop of ceramic at room temperature.
FIG. 5 is 0.90 (Bi) obtained in example 3 of the present invention0.5Na0.5Ti0.95Al0.025O3)-0.10(SrSc0.5Nb0.5O3) Electron microscopy pictures of ceramic samples.
FIG. 6 is 0.90 (Bi) obtained in example 3 of the present invention0.5Na0.5Ti0.95Al0.025O3)-0.10(SrSc0.5Nb0.5O3) Hysteresis loop of ceramic at room temperature.
FIG. 7 shows 0.85 (Bi) obtained in example 4 of the present invention0.5Na0.5Ti0.95Al0.025O3)-0.15(SrSc0.5Nb0.5O3) Electron microscopy pictures of ceramic samples.
FIG. 8 is 0.85 (Bi) obtained in example 4 of the present invention0.5Na0.5Ti0.95Al0.025O3)-0.15(SrSc0.5Nb0.5O3) Hysteresis loop of ceramic at room temperature.
FIG. 9 is a graph of the energy storage performance of BNT-based ceramics.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
this example is a BNT-based energy-storing ceramic material having the chemical formula (Bi)0.5Na0.5Ti0.95Al0.025O3)1-x(SrSc0.5Nb0.5O3)xWherein x is 0 and x is mole number.
Analytically pure raw material Bi2O3、Na2CO3、TiO2、Al2O3、Nb2O5、SrCO3、Sc2O3The mixture was placed in an oven at 120 ℃ and kept warm for 12 hours.
And (3) weighing the raw materials obtained in the step (1) according to the stoichiometric ratio, and pouring the raw materials into a ball milling tank.
The raw materials obtained in the step 2 are as follows: zirconium ball: and putting the absolute ethyl alcohol into a planetary ball mill for primary ball milling at a mass ratio of 1:1:2, wherein the ball milling time is 12 hours.
And (4) pouring the product obtained in the step (3) into a culture dish, drying the culture dish in a 60 ℃ oven, and sieving the culture dish by using a 60-mesh sieve to separate the zirconium balls from the powder.
Heating the powder obtained in the step (4) to 850 ℃ at the speed of 3 ℃/min, and preserving the heat for 2h in a high-temperature sintering furnace to obtain the (Bi) with the perovskite structure0.5Na0.5Ti0.95Al0.025O3) And (3) powder.
And (4) performing secondary ball milling on the powder obtained in the step (5), and repeating the steps (3) and (4).
And (4) adding 5 wt% of polyvinyl alcohol (PVA) into the powder obtained in the step (6) for granulation.
And (3) tabletting the powder obtained in the step (7) by using a grinding tool with the diameter of 13mm and a tabletting machine with the pressure of 60MPa to obtain a biscuit with the diameter of 13 mm.
And putting the biscuit in a high-temperature sintering furnace, and preserving the heat for 4 hours at the temperature of 600 ℃.
And putting the unglued blank into a high-temperature sintering furnace, heating to 1150 ℃ at the heating rate of 3 ℃/min, and preserving the temperature for 2h to obtain the pure BNT-BAN ceramic.
Performing SEM scanning test on the ceramic wafer obtained in the step 10, wherein SSN (SrSc) is not added0.5Nb0.5O3) Then (c) is performed. As shown in fig. 1, the distribution of the grains is not uniform, and most of the grains grow out without catalysis of SSN.
Polishing the ceramic wafer obtained in the step 10 into 0.2mm, covering a dot silver electrode on one surface of the ceramic wafer, wherein the area of the dot silver electrode is 0.0314cm2And the back surface is covered with the full silver electrode. The electric hysteresis loop is measured to obtain figure 2, the obesity of the P-E curve can be observed, and the energy storage efficiency is 47 percent less than 50 percent.
Example 2:
this example is a BNT-based energy-storing ceramic material having the chemical formula (Bi)0.5Na0.5Ti0.95Al0.025O3)1-x(SrSc0.5Nb0.5O3)xWherein x is 0.05 and x is mole number.
Analytically pure raw material Bi2O3、Na2CO3、TiO2、Al2O3、Nb2O5、SrCO3、Sc2O3The mixture was placed in an oven at 120 ℃ and kept warm for 12 hours.
And (3) weighing the raw materials obtained in the step (1) according to the stoichiometric ratio, and pouring the raw materials into a ball milling tank.
The raw materials obtained in the step 2 are as follows: zirconium ball: and putting the absolute ethyl alcohol into a planetary ball mill for primary ball milling at a mass ratio of 1:1:2, wherein the ball milling time is 12 hours.
And (3) pouring the product obtained in the step (3) into a culture dish, drying the culture dish in a 60 ℃ oven, and then sieving the culture dish by using a 60-mesh sieve to separate the zirconium balls from the powder.
Heating the powder obtained in the step (4) to 850 ℃ at the speed of 3 ℃/min, and preserving the heat for 2h in a high-temperature sintering furnace to obtain the (Bi) with the perovskite structure0.5Na0.5Ti0.95Al0.025O3)0.95(SrSc0.5Nb0.5O3)0.05And (3) powder.
And (4) performing secondary ball milling on the powder obtained in the step (5), and repeating the steps (3) and (4).
And (4) adding 5 wt% of polyvinyl alcohol (PVA) into the powder obtained in the step (6) for granulation.
And (3) tabletting the powder obtained in the step (7) by using a grinding tool with the diameter of 13mm and a tabletting machine with the pressure of 60MPa to obtain a biscuit with the diameter of 13 mm.
And putting the biscuit in a high-temperature sintering furnace, and preserving the heat for 4 hours at the temperature of 600 ℃.
And putting the unglued biscuit into a high-temperature sintering furnace, heating to 1150 ℃ at the heating rate of 3 ℃/min, and preserving the heat for 2h to obtain the 0.95(BNT-BAN) -0.05SSN ceramic.
And (4) performing SEM scanning test on the ceramic wafer obtained in the step (10), as shown in figure 3, the crystal grains grow well, are distributed uniformly and are compact, and have no air holes.
Polishing the ceramic wafer obtained in the step 10 into 0.2mm, covering a dot silver electrode on one surface of the ceramic wafer, wherein the area of the dot silver electrode is 0.0314cm2And the back surface is covered with the full silver electrode. The electric hysteresis loop is measured to obtain figure 4, and obviously, after SSN is added, the P-E curve becomes thin, and the energy storage efficiency is increased by over 50 percent.
Example 3:
the embodiment is BNT-based energy storage ceramicA material of the formula (Bi)0.5Na0.5Ti0.95Al0.025O3)1-x(SrSc0.5Nb0.5O3)xWherein x is 0.10 and x is mole number.
Analytically pure raw material Bi2O3、Na2CO3、TiO2、Al2O3、Nb2O5、SrCO3、Sc2O3The mixture was placed in an oven at 120 ℃ and kept warm for 12 hours.
And (3) weighing the raw materials obtained in the step (1) according to the stoichiometric ratio, and pouring the raw materials into a ball milling tank.
The raw materials obtained in the step 2 are as follows: zirconium ball: and putting the absolute ethyl alcohol into a planetary ball mill for primary ball milling at a mass ratio of 1:1:2, wherein the ball milling time is 12 hours.
And (3) pouring the product obtained in the step (3) into a culture dish, drying the culture dish in a 60 ℃ oven, and then sieving the culture dish by using a 60-mesh sieve to separate the zirconium balls from the powder.
Heating the powder obtained in the step (4) to 850 ℃ at the speed of 3 ℃/min, and preserving the heat for 2h in a high-temperature sintering furnace to obtain the (Bi) with the perovskite structure0.5Na0.5Ti0.95Al0.025O3)0.90(SrSc0.5Nb0.5O3)0.10And (3) powder.
And (4) performing secondary ball milling on the powder obtained in the step (5), and repeating the steps (3) and (4).
And (4) adding 5 wt% of polyvinyl alcohol (PVA) into the powder obtained in the step (6) for granulation.
And (3) tabletting the powder obtained in the step (7) by using a grinding tool with the diameter of 13mm and a tabletting machine with the pressure of 60MPa to obtain a biscuit with the diameter of 13 mm.
And putting the biscuit in a high-temperature sintering furnace, and preserving the heat for 4 hours at the temperature of 600 ℃.
And putting the unglued biscuit into a high-temperature sintering furnace, heating to 1150 ℃ at the heating rate of 3 ℃/min, and preserving the heat for 2h to obtain the 0.90(BNT-BAN) -0.10SSN ceramic.
And (3) performing SEM scanning test on the ceramic wafer obtained in the step (10), wherein as shown in figure 5, the crystal grains grow well, are uniformly distributed and compact and have no air holes.
Polishing the ceramic wafer obtained in the step 10 into 0.2mm, covering a dot silver electrode on one surface of the ceramic wafer, wherein the area of the dot silver electrode is 0.0314cm2And the back surface is covered with the full silver electrode. The electric hysteresis loop is measured to be shown in figure 6, the Wrec is 2.0304J/cm2, the numerical value exceeds 30 percent of BNT-based ceramic without SSN, and the energy storage efficiency is continuously increased and approaches to 70 percent.
Example 4:
the example is a BNT-based energy storage ceramic material, and the chemical formula is as follows: (Bi)0.5Na0.5Ti0.95Al0.025O3)1-x(SrSc0.5Nb0.5O3)xWherein x is 0.15 and x is mole number.
Analytically pure raw material Bi2O3、Na2CO3、TiO2、Al2O3、Nb2O5、SrCO3、Sc2O3The mixture was placed in an oven at 120 ℃ and kept warm for 12 hours.
And (3) weighing the raw materials obtained in the step (1) according to the stoichiometric ratio, and pouring the raw materials into a ball milling tank.
The raw materials obtained in the step 2 are as follows: zirconium ball: and putting the absolute ethyl alcohol into a planetary ball mill for primary ball milling at a mass ratio of 1:1:2, wherein the ball milling time is 12 hours.
And (3) pouring the product obtained in the step (3) into a culture dish, drying the culture dish in a 60 ℃ oven, and then sieving the culture dish by using a 60-mesh sieve to separate the zirconium balls from the powder.
Heating the powder obtained in the step (4) to 850 ℃ at the speed of 3 ℃/min, and preserving the heat for 2h in a high-temperature sintering furnace to obtain the (Bi) with the perovskite structure0.5Na0.5Ti0.95Al0.025O3)0.85(SrSc0.5Nb0.5O3)0.15And (3) powder.
And (4) performing secondary ball milling on the powder obtained in the step (5), and repeating the steps (3) and (4).
And (4) adding 5 wt% of polyvinyl alcohol (PVA) into the powder obtained in the step (6) for granulation.
And (3) tabletting the powder obtained in the step (7) by using a grinding tool with the diameter of 13mm and a tabletting machine with the pressure of 60MPa to obtain a biscuit with the diameter of 13 mm.
And putting the biscuit in a high-temperature sintering furnace, and preserving the heat for 4 hours at the temperature of 600 ℃.
And putting the unglued biscuit into a high-temperature sintering furnace, heating to 1150 ℃ at the heating rate of 3 ℃/min, and preserving the heat for 2h to obtain the 0.85(BNT-BAN) -0.15SSN ceramic.
And (3) performing SEM scanning test on the ceramic wafer obtained in the step (10), as shown in FIG. 7, the crystal grains grow well, are uniformly distributed and compact, and have no air holes.
Polishing the ceramic wafer obtained in the step 10 into 0.2mm, covering a dot silver electrode on one surface of the ceramic wafer, wherein the area of the dot silver electrode is 0.0314cm2And the back surface is covered with the full silver electrode. The electric hysteresis loop is measured to obtain figure 8, wherein Wrec is 2.376J/cm2, the numerical value exceeds 38% of the BNT-based ceramic without SSN, and the energy storage efficiency continues to increase by over 75%.
As can be seen from FIGS. 3, 5 and 7, addition of SrSc0.5Nb0.5O3And then the surface of the crystal is observed, the sizes of the crystal grains are uniform and have little difference, the crystal grains are good in development, no air hole is formed in the three components, and the compactness is high.
As can be seen from FIGS. 4, 6 and 8, the energy storage efficiency can exceed 50%, and the Wrec values are 1.402J/cm2, 2.304J/cm2 and 2.376J/cm2 respectively. Wherein the breakdown field strength is 140kv/cm, 160kv/cm and 210kv/cm respectively.
As can be seen from FIG. 9, the BNT-based ceramic has low energy storage performance, the breakdown field strength is difficult to break through 200kv/cm, and the Wrec value is difficult to break through 2.00J/cm 2. No good method is found for breaking through the bottleneck of low energy storage of the BNT-based ceramic.
Claims (2)
1. A method for preparing a BNT-based energy storage ceramic material, which is characterized by comprising the following steps: synthesized by solid phase method (Bi)0.5Na0.5Ti0.95Al0.025O3)1-x(SrSc0.5Nb0.5O3)xWherein x =0.05-0.15, grinding the prepared powder, adding polyvinyl alcohol accounting for 3% -7% of the powder by mass, granulating, pressing and forming to obtain a biscuit, keeping the temperature for 2-4 hours at 600-650 ℃, and raising the temperature at a speedKeeping the polyvinyl alcohol stable between 3 ℃ and 5 ℃/min; and finally, placing the blank body in a 1120-1150 ℃ sintering furnace, and preserving heat for 2-4 hours to finally obtain a sample.
2. Use of the BNT-based energy storage ceramic material prepared by the preparation method according to claim 1, wherein the ceramic material is polished to a desired size, and a dot silver electrode is covered on one side of the ceramic material, and the area of the dot silver electrode is 0.0314cm2And the back surface is covered with a full silver electrode to obtain the energy storage component.
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