CN109608046B - Boron-containing niobate-based energy storage glass ceramic with compact glass structure and preparation method thereof - Google Patents
Boron-containing niobate-based energy storage glass ceramic with compact glass structure and preparation method thereof Download PDFInfo
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- CN109608046B CN109608046B CN201910021958.1A CN201910021958A CN109608046B CN 109608046 B CN109608046 B CN 109608046B CN 201910021958 A CN201910021958 A CN 201910021958A CN 109608046 B CN109608046 B CN 109608046B
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- 239000011521 glass Substances 0.000 title claims abstract description 48
- 238000004146 energy storage Methods 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 title claims abstract description 5
- 229910052796 boron Inorganic materials 0.000 title claims abstract description 5
- 239000002241 glass-ceramic Substances 0.000 title description 11
- 239000006112 glass ceramic composition Substances 0.000 claims abstract description 26
- 239000013078 crystal Substances 0.000 claims abstract description 17
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Chemical compound O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 claims abstract description 11
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 10
- 238000000137 annealing Methods 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 8
- 238000002844 melting Methods 0.000 claims abstract description 6
- 230000008018 melting Effects 0.000 claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 16
- 238000002425 crystallisation Methods 0.000 claims description 12
- 230000008025 crystallization Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000000377 silicon dioxide Substances 0.000 claims description 10
- 229910052681 coesite Inorganic materials 0.000 claims description 8
- 229910052906 cristobalite Inorganic materials 0.000 claims description 8
- 229910052682 stishovite Inorganic materials 0.000 claims description 8
- 229910052905 tridymite Inorganic materials 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 7
- 239000011734 sodium Substances 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 5
- 239000005347 annealed glass Substances 0.000 claims description 2
- 229910052810 boron oxide Inorganic materials 0.000 claims description 2
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- UYLYBEXRJGPQSH-UHFFFAOYSA-N sodium;oxido(dioxo)niobium Chemical compound [Na+].[O-][Nb](=O)=O UYLYBEXRJGPQSH-UHFFFAOYSA-N 0.000 claims description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims 6
- 229910000027 potassium carbonate Inorganic materials 0.000 claims 3
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- 238000005303 weighing Methods 0.000 claims 1
- 230000015556 catabolic process Effects 0.000 abstract description 16
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 3
- 229910003378 NaNbO3 Inorganic materials 0.000 abstract description 2
- 238000009740 moulding (composite fabrication) Methods 0.000 abstract 2
- 238000009472 formulation Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000012768 molten material Substances 0.000 description 4
- 239000010453 quartz Substances 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004031 devitrification Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000004455 differential thermal analysis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000011267 electrode slurry Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006124 glass-ceramic system Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- MUPJWXCPTRQOKY-UHFFFAOYSA-N sodium;niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Na+].[Nb+5] MUPJWXCPTRQOKY-UHFFFAOYSA-N 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/02—Other methods of shaping glass by casting molten glass, e.g. injection moulding
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B25/00—Annealing glass products
Abstract
The invention relates to a niobate-based energy storage glass ceramic material with a compact glass structure containing boron and a preparation method thereof, wherein the microcrystalline glass material is prepared by mixing, melting, cooling and forming, annealing and crystallizing heat treatment of a glass phase and a crystal phase; wherein the crystal phase is formed by K with a molar ratio of 7:1:82CO3、Na2CO3And Nb2O5(ii) a The glass phase is formed by mol ratio ofx：（1‑x）（xSiO of =1,0.85,0.7,0.54,0.37, 0)2、H3BO3(ii) a The molar ratio of the crystal phase to the glass phase is 4: 1. the potassium-sodium niobate-based energy storage glass-ceramic material prepared by the invention has low dielectric loss; h added according to the invention3BO3The glass network is more compact, and thus higher breakdown strength is obtained. Forming high dielectric constant NaNbO3And finally obtaining the high energy storage density glass ceramic material.
Description
Technical Field
The invention relates to the field of glass ceramic materials and a preparation method thereof, in particular to a boron-containing niobate-based energy storage glass ceramic material with a compact glass structure and a preparation method thereof.
Background
In recent years, the development of pulse technology and higher application requirements have made more stringent requirements on the electrical breakdown resistance and energy storage performance of materials, so that ferroelectric glass ceramic materials, which are a major branch of energy storage dielectric materials, are gaining increasing favor of researchers. The ferroelectric glass ceramic mainly depends on the mutual coordination and matching of the high breakdown field strength of the internal glass phase and the good dielectric property of the ferroelectric crystal phase, and finally the material has larger energy storage density.
Formula for calculating energy storage density according to linear dielectric medium
The energy storage density of the available energy storage element and its own relative dielectric constant are related to the breakdown field strength, wherein the breakdown strength has a greater influence on the magnitude of the energy storage density. In order to make the glass-ceramic material have a high energy storage density, the composition of the glass phase affecting the breakdown strength of the glass-ceramic material should be intensively studied. The glass structure mainly comprises a network generation body, a network modification body and a network intermediate body. The breakdown strength is in an important relationship with the tightness of the glass structure, the electrical properties of the glass-ceramicBreakdown is primarily related to long range motion resulting in a large number of carriers when an external electric field is applied. And if the residual glass phase has a compact glass structure, the long-range movement of carriers becomes difficult, thereby improving the breakdown strength. Silica is the most predominant network former and structurally stable is used by a number of glass ceramic systems. The silicon oxygen bonds (106 kcal/mol) are smaller than the boron oxygen bonds (119 kcal/mol), and it is considered that in order to obtain a more compact glass network structure, it is a solution to add boron oxide having a larger bond energy.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a niobate-based energy storage glass ceramic material with a compact boron-added glass structure and a preparation method thereof.
In order to realize the purpose, the technical scheme adopted by the glass ceramic is as follows:
the crystal phase is formed by K with a molar ratio of 7:1:82CO3、Na2CO3And Nb2O5(ii) a The glass phase is formed by mol ratio ofx：（1-x) SiO of (2)2、H3BO3(ii) a The molar ratio of the crystal phase to the glass phase is 4: the formula 1 is prepared by mixing, melting, molding, annealing and crystallizing.
The preparation method of the glass ceramic material adopts the technical scheme that the preparation method comprises the following steps:
1) k according to a 4 molar ratio of 7:1:82CO3、Na2CO3And Nb2O5(ii) a The glass phase is formed by SiO with a molar ratio of 1:32、H3BO3(ii) a The molar ratio of the crystal phase to the glass phase is 4:1 and mixing;
2) adding the mixture obtained in the step 1) into a quartz crucible and heating until a uniformly mixed melt is formed; pouring the melt into a mold for molding to obtain a glass sample, and annealing the glass sample;
3) the glass sample after annealing treatment is crystallizedThe crystallization treatment is heat preservation at 950 ℃ for 2 hours to obtain K2O-Na2O-Nb2O5-SiO2-B2O3The system is made of glass ceramic material.
Further, the heating temperature in the step 2) is 1450-1500 ℃.
Further, the annealing treatment in the step 2) is heat preservation for 8-11 hours at 500-600 ℃.
Further, the crystallization temperature of the glass sample in the step 3) is about 950 ℃.
Further, the devitrification temperature in step 3) is determined by DSC differential thermal analysis of the glass substrate sample.
Compared with the prior art, the invention has the beneficial effects that:
the potassium-sodium niobate glass ceramic material prepared by the invention has extremely low porosity, and simultaneously, three parts of a network forming body, a network outer body and a network intermediate are required for forming glass. B is2O3The glass network forming body has a more compact structure when it has an octahedral structure. Therefore, the invention reasonably controls B2O3The content ratio of the components can generate a compact network structure, the dielectric constant can reach 180, the breakdown field strength can reach 460kV/cm, the dielectric loss can be reduced to 0.073, the energy storage density is increased to 1.64J/cm3. In addition, NaNbO is formed in multiple forms during the preparation process3Phase example more addition of Na2CO3Therefore, these examples can also obtain more crystal phases.
The preparation method of the invention only needs to carry out mixing melting, molding, annealing and crystallization treatment on all raw materials to obtain the potassium-sodium niobate glass ceramic material.
Drawings
FIG. 1 is an X-ray diffraction (XRD) pattern of potassium sodium niobate-based glass ceramic materials prepared in example 1, example 2, example 3, example 4, example 5 and example 6 of the present invention;
FIG. 2 is a graph of dielectric constant and dielectric loss of the potassium sodium niobate-based glass ceramic material prepared by the present invention.
Detailed Description
The method comprises the following specific steps:
1) k in a molar ratio of 7:1:82CO3、Na2CO3And Nb2O5(ii) a The glass phase is formed by mol ratio ofx：（1-x) SiO of (2)2、H3BO3(ii) a The molar ratio of the crystal phase to the glass phase is 4:1 and mixing to obtain a mixture;
2) heating a quartz crucible to 1000-1200 ℃ along with a furnace from room temperature, starting adding the mixture, then continuously heating to 1450-1500 ℃, and preserving heat for 50-60 min to ensure that the mixture is fully melted and has no bubbles to finally obtain a mixed molten material; molding the mixed molten material on a copper plate mold at room temperature, and quickly putting the copper plate mold into a furnace to anneal for 8-11 hours at 500-600 ℃ so as to eliminate internal stress and obtain a glass sample;
preserving the temperature of the glass sample at 950 ℃, performing segmented crystallization treatment for 4 hours, and cooling to room temperature along with the furnace to obtain K2O-Na2O-Nb2O5-SiO2-B2O3The system is made of glass ceramic material.
The present invention is further illustrated in detail below with reference to specific examples:
example 1:
crystallization treatment of the glass sample in this example: the temperature is kept at 950 ℃ for 4 h.
The preparation method of the glass ceramic material comprises the following steps:
1) k in the molar ratio of 7:1:8 in this example2CO3、Na2CO3And Nb2O5(ii) a The glass phase is formed by SiO with the mol ratio of 1:02、H3BO3(ii) a The molar ratio of the crystal phase to the glass phase is 4:1 and mixing.
2) Heating a quartz crucible along with a furnace from room temperature to 1100 ℃, starting adding the mixture, then continuing heating to 1500 ℃, and preserving heat at 1500 ℃ for 60min to uniformly melt the mixture to obtain a mixed molten material; molding the mixed molten material on a copper plate, and quickly putting the copper plate into a furnace to anneal for 11 hours at 500 ℃ to obtain an annealed glass substrate;
3) keeping the temperature at 950 ℃ for 4h, and then cooling the mixture to room temperature along with the furnace to obtain K2O-Na2O-Nb2O5-SiO2-B2O3The system is made of glass ceramic material.
Cutting the potassium-sodium niobate glass ceramic obtained in the embodiment into a sheet with the thickness of 0.1-0.2 mm by using a cutting machine, polishing and cleaning the sheet, uniformly coating silver electrode slurry on the front surface and the back surface of the sheet, and preserving heat at 600 ℃ for 20 minutes to obtain a glass ceramic sample to be detected.
Example 2:
the glass phase of the glass sample in this example is prepared by mixing the following components in a molar ratio of 0.85: 0.15 SiO2、H3BO3And the mixture was melted by feeding at 1500 ℃ and heat-preserved for 60min, under the same conditions as in example 1.
Example 3:
the formulation of the glass sample in this example was 0.7: 0.3 SiO2、H3BO3The other conditions were the same as in example 1.
Example 4:
the formulation of the glass sample in this example was 0.54: 0.46 SiO2、H3BO3The other conditions were the same as in example 1.
Example 5:
the formulation of the glass sample in this example was 0.37: 0.63 SiO2、H3BO3The other conditions were the same as in example 1.
Example 6:
the formulation of the glass sample in this example was 0: 1 SiO2、H3BO3The other conditions were the same as in example 1.
FIG. 1 is an X-ray diffraction analysis of the above six examples, showing the effect of different experimental formulations on their degree of crystallinity and phase. Can be seen at 950oAt the crystallization temperature of C, the crystallization degree of 6 examples is high, and the crystal phase is mainly NaNbO3。
FIG. 2 shows the dielectric property test results of the first glass-ceramic material prepared by the above six examples, which are as follows:
TABLE Performance test data for the glass-ceramic samples prepared in examples 1 to 4
| Examples | 1 | 2 | 3 | 4 | 5 | 6 |
| |
150 | 75 | 100 | 73 | 70 | 72 |
| Breakdown field strength (kV/cm) | 425 | 460 | 400 | 415 | 375 | 350 |
| Dielectric loss | 0.060 | 0.074 | 0.045 | 0.027 | 0.025 | 0.028 |
| Energy storage Density (J/cm)3) | 1.34 | 1.43 | 1.18 | 1.05 | 0.89 | 0.73 |
According to the energy storage formula:
the breakdown field intensity is one of the most obvious factors influencing the energy storage density, and the glass ceramic material has reduced dielectric constant and increased breakdown field intensity due to the existence of glass, so the invention generates the ferroelectric glass ceramic with high dielectric constant, high breakdown field intensity and low dielectric loss by reasonably controlling the content of the antiferroelectric sodium niobate crystal. And the sample is prepared by adopting a melting method, the process is simple and convenient, the forming method is more, the breakdown strength is high, and the method is an important method for preparing the material with high energy storage density. The prepared potassium-sodium niobate glass ceramic with high dielectric constant and high breakdown field strength is expected to replace the traditional ferroelectric ceramic materialBecomes one of important candidate materials of the energy storage material with excellent technical and economic aspects.
The invention adopts the melting method to prepare the potassium-sodium niobate glass ceramic material, and has the advantages of simple and convenient preparation method, simple process flow, randomly controlled molding according to the requirement, short production period and particular suitability for industrial production. The crystallization treatment adopts the heat preservation time of 4 hours so that the crystal phase grows more completely and the crystallization is more thorough, and the crystal phase can be obtained through later test, and when the heat preservation treatment is carried out at a higher crystallization peak, the content of the internal crystal phase of the obtained potassium sodium niobate-based glass ceramic sample is higher, and the energy storage density is higher. The potassium-sodium niobate-based glass ceramic material prepared by the invention is a ferroelectric glass ceramic with high dielectric constant, high breakdown field strength and low dielectric loss.
The above description is only one embodiment of the present invention, and not all or only one embodiment, and any equivalent alterations to the technical solutions of the present invention, which are made by those skilled in the art through reading the present specification, are covered by the claims of the present invention.
Claims (4)
1. The preparation method of the niobate-based energy storage glass ceramic material with the boron-containing glass structure compact is characterized by comprising the following steps:
Na2CO3、K2CO3、Nb2O5、SiO2and H3BO3Mixing in a molar ratio of Na2CO3、K2CO3、Nb2O5The molar ratio is 7:1:8, SiO2、H3BO3In a molar ratio ofx：（1-x) X is more than or equal to 0.85 and more than or equal to 0.37; heating and melting the mixture, annealing to eliminate internal stress, and carrying out crystallization heat treatment to obtain Na containing potassium-sodium niobate and sodium niobate crystal phase2O-K2O-Nb2O5-SiO2-B2O3The system energy storage glass ceramic material comprises a glass phase and a system energy storage glass ceramic material, wherein the glass phase comprises silicon dioxide and boron oxide, and the molar ratio of a crystal phase to the glass phase is 4: 1.
2. The method according to claim 1, characterized in that the specific steps comprise:
1) weighing Na according to the given molar ratio in claim 12CO3、K2CO3、Nb2O5、SiO2And H3BO3And mixing;
2) heating the mixture in step 1) until a uniformly mixed melt is formed; pouring the melt into a mold for molding to obtain a glass sample, and annealing the glass sample;
3) crystallizing the annealed glass sample, wherein the crystallization is carried out by keeping the temperature at 950 ℃ for 4 hours to obtain Na2O-K2O-Nb2O5-SiO2-B2O3The system energy storage glass ceramic material.
3. The method of claim 2, wherein: the heating temperature in the step 2) is 1450-1500 ℃.
4. The method of claim 2, wherein: the annealing treatment in the step 2) is carried out under the condition of heat preservation for 8-11 h at 500-600 ℃.
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| CN102046551A (en) * | 2008-05-27 | 2011-05-04 | 默克专利股份有限公司 | Glass-ceramic discs for use in pigments |
| CN105254180A (en) * | 2015-09-22 | 2016-01-20 | 陕西科技大学 | K2O-Na2O-Nb2O5-SiO2-B2O3 system glass ceramic material used for energy storage, and preparation method thereof |
| CN108794003A (en) * | 2018-07-17 | 2018-11-13 | 华南理工大学 | A kind of biological glass ceramic and preparation method thereof of doping potassium-sodium niobate |
| CN108840570A (en) * | 2018-07-18 | 2018-11-20 | 陕西科技大学 | Containing NaNbO3The Na of phase2O-K2O-Nb2O5-SiO2Low-dielectric loss energy storage glass ceramics |
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| CN102046551A (en) * | 2008-05-27 | 2011-05-04 | 默克专利股份有限公司 | Glass-ceramic discs for use in pigments |
| CN105254180A (en) * | 2015-09-22 | 2016-01-20 | 陕西科技大学 | K2O-Na2O-Nb2O5-SiO2-B2O3 system glass ceramic material used for energy storage, and preparation method thereof |
| CN108794003A (en) * | 2018-07-17 | 2018-11-13 | 华南理工大学 | A kind of biological glass ceramic and preparation method thereof of doping potassium-sodium niobate |
| CN108840570A (en) * | 2018-07-18 | 2018-11-20 | 陕西科技大学 | Containing NaNbO3The Na of phase2O-K2O-Nb2O5-SiO2Low-dielectric loss energy storage glass ceramics |
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