CN107935586A - BT KBT base energy storage ceramics that a kind of potassium niobate is modified and preparation method thereof - Google Patents
BT KBT base energy storage ceramics that a kind of potassium niobate is modified and preparation method thereof Download PDFInfo
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- CN107935586A CN107935586A CN201711115394.5A CN201711115394A CN107935586A CN 107935586 A CN107935586 A CN 107935586A CN 201711115394 A CN201711115394 A CN 201711115394A CN 107935586 A CN107935586 A CN 107935586A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 89
- 238000004146 energy storage Methods 0.000 title claims abstract description 66
- UKDIAJWKFXFVFG-UHFFFAOYSA-N potassium;oxido(dioxo)niobium Chemical compound [K+].[O-][Nb](=O)=O UKDIAJWKFXFVFG-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 73
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 48
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims abstract description 48
- 239000000126 substance Substances 0.000 claims abstract description 45
- 229910010252 TiO3 Inorganic materials 0.000 claims abstract description 29
- 238000000498 ball milling Methods 0.000 claims abstract description 25
- 229910000027 potassium carbonate Inorganic materials 0.000 claims abstract description 24
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 24
- 229910000416 bismuth oxide Inorganic materials 0.000 claims abstract description 13
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 claims abstract description 13
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 9
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 claims description 22
- 229910003334 KNbO3 Inorganic materials 0.000 claims description 12
- 229910002113 barium titanate Inorganic materials 0.000 claims description 11
- 239000008367 deionised water Substances 0.000 claims description 11
- 229910021641 deionized water Inorganic materials 0.000 claims description 11
- 229910052573 porcelain Inorganic materials 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 4
- 229910010293 ceramic material Inorganic materials 0.000 abstract description 32
- 238000001035 drying Methods 0.000 abstract description 10
- 238000007493 shaping process Methods 0.000 abstract description 10
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000010532 solid phase synthesis reaction Methods 0.000 abstract description 2
- 238000005245 sintering Methods 0.000 abstract 1
- 230000010287 polarization Effects 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000003985 ceramic capacitor Substances 0.000 description 2
- 229910002112 ferroelectric ceramic material Inorganic materials 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005621 ferroelectricity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002887 superconductor Substances 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
- C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
- C04B35/465—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates
- C04B35/468—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3201—Alkali metal oxides or oxide-forming salts thereof
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3251—Niobium oxides, niobates, tantalum oxides, tantalates, or oxide-forming salts thereof
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3298—Bismuth oxides, bismuthates or oxide forming salts thereof, e.g. zinc bismuthate
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- C04B2235/6567—Treatment time
Abstract
BT KBT base energy storage ceramic materials being modified the present invention relates to a kind of potassium niobate and preparation method thereof, belong to technical field of electronic ceramic.The formula for the BT KBT based high energy storage density ceramic materials that the potassium niobate is modified is (1 x) (0.92BaTiO3‑0.08(K1/2Bi1/2)TiO3)‑xKNbO3(x=0.04 0.10), its preparation process is included with barium carbonate, potassium carbonate, bismuth oxide, titanium dioxide and niobium pentaoxide are raw material, BT, KBT and KN ceramic powder are respectively synthesized, BT KBT base energy storage ceramic materials are prepared through techniques such as dispensing, ball milling, drying, tabletting, shaping, sintering according to chemical formula.The present invention prepares ceramic material using solid phase method has the advantages that cost is low, yield is big and preparation process is simple, prepares new high energy storage density ceramic material for extensive, low cost and provides the foundation.
Description
Technical field
The invention belongs to technical field of material, and in particular to a kind of BT-KBT bases energy storage ceramic that potassium niobate is modified and
Its preparation method.
Background technology
Capacitor is one of electronic component largely used in electronic equipment as a kind of important energy storage device.And
Ceramic capacitor have the advantages that wide use temperature range, long lifespan, dependable performance and be widely used.Capacitive energy storage is easily protected
Hold, it is not necessary to superconductor.It is important that capacitive energy storage also have be to provide moment it is high-power, be very suitable for laser
The application scenarios such as device, flash lamp.The energy size of capacitor storage is determined by the energy storage density of its size and dielectric material.In order to
Reduce its size, improve the amount of storage of its energy, ceramic medium material of the exploitation with high energy storage density can effectively solve this
One problem.Ceramic capacitor have the advantages that wide use temperature range, long lifespan, dependable performance and be widely used.Wherein iron
Electroceramics material has the advantages that dielectric constant is big, and nonlinear effect is strong, and the energy storage density J of unit volume ferroelectric ceramic material can
Calculated by following formula：
J=∫ EdP
Wherein P is polarization intensity, and E is its breakdown strength.
The energy storage density of ferroelectric ceramic material is by its Minimum Polarization intensity (Pr), maximum polarization (Pm) and breakdown strength
(Eb) together decide on.But the Ba being widely studied0.4Sr0.6TiO3The energy storage density of ceramics is only~0.37J/cm3, energy storage
Density is relatively low.
The content of the invention
BT-KBT base energy storage ceramics being modified the object of the present invention is to provide a kind of potassium niobate and preparation method thereof, this method
Obtained ceramic material energy storage density is up to 0.97J/cm3, and the preparation method is simple, it is easy to accomplish.
The present invention is to be achieved through the following technical solutions：
The invention discloses the BT-KBT base energy storage ceramics that a kind of potassium niobate is modified, the change of the BT-KBT bases energy storage ceramic
Learning composition is：(1-x)(0.92BaTiO3-0.08(K1/2Bi1/2)TiO3)-xKNbO3；Wherein, x value ranges for 0.04~
0.10。
Preferably, the energy storage density of the BT-KBT bases energy storage ceramic is 0.89~0.97J/cm3。
The preparation method for the BT-KBT base energy storage ceramics being modified the invention also discloses a kind of potassium niobate, by BT ceramic powders
Body, KBT ceramic powders and potassium niobate powder are according to chemical formula (1-x) (0.92BaTiO3-0.08(K1/2Bi1/2)TiO3)-xKNbO3
Dispensing, is uniformly mixed aftershaping, and 2~6h is kept the temperature at 1130~1170 DEG C, sinters porcelain into, and BT-KBT based high energy storage densities are made
Ceramic material；Wherein, x value ranges are 0.04~0.10.
Preferably, described be uniformly mixed is realized by ball milling, and is used as ball-milling medium using deionized water.
It is further preferred that the time of the ball milling is 6~8h.
Preferably, dried after mixing at 75 DEG C -90 DEG C.
Preferably, the BT ceramic powders are made by the following method：
According to chemical formula BaTiO3Metering proportion, barium carbonate and titanium dioxide are kept the temperature at 1150 DEG C after mixing
3h, is made BT ceramic powders.
Preferably, the KBT ceramic powders are made by the following method：
According to chemical formula K0.5Bi0.5TiO3Metering proportion, potassium carbonate, bismuth oxide and titanium dioxide are existed after mixing
4h is kept the temperature at 950 DEG C, KBT ceramic powders are made.
Preferably, the potassium niobate ceramic powder is made by the following method：
According to chemical formula KNbO3Metering proportion, potassium carbonate and niobium pentaoxide are kept the temperature at 800 DEG C after mixing
2h, is made potassium niobate ceramic powder.
Compared with prior art, the present invention has technique effect beneficial below：
The present invention reduces its saturated polarization by adding potassium niobate, so that high energy storage density ceramic material is made,
Due to 0.92BaTiO3-0.08(K1/2Bi1/2)TiO3With higher maximum polarization (Pm~42.52 μ C/cm3), but its
Higher (the P of remanent polarizationr~36.71 μ C/cm3), make it have relatively low energy storage density (0.46J/cm3), due to potassium niobate
In K+,Nb5+It can cause distortion of lattice into lattice, cause ceramic phase structure by tetragonal phase converting to be pseudo- Emission in Cubic, ferroelectricity
Weaken, it is of the invention to 0.92BaTiO so as to effectively reduce its remanent polarization therefore3-0.08(K1/2Bi1/2)TiO3Add
Add suitable KNbO3To reduce its remanent polarization, so as to obtain the ceramic material with high energy storage density.
The present invention is with barium carbonate, and potassium carbonate, bismuth oxide, titanium dioxide and niobium pentaoxide are raw material, using solid phase method, system
Standby (1-x) (0.92BaTiO3-0.08(K1/2Bi1/2)TiO3)-xKNbO3The energy storage density of ceramic material is up to 0.89~0.97J/
cm3.Preparation method equipment of the invention is simple, easy to operate, cost is low, can be mass-produced, and is prepared for extensive, low cost
High energy storage density ceramic material provides the foundation.
Brief description of the drawings
Fig. 1 is the ferroelectric hysteresis loop figure of the ceramic material of x=0.04.
Fig. 2 is the ferroelectric hysteresis loop figure of the ceramic material of x=0.08.
Fig. 3 is the ferroelectric hysteresis loop figure of the ceramic material of x=0.10.
Embodiment
With reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
Embodiment 1
A kind of preparation method for the BT-KBT base energy storage ceramic materials that potassium niobate is modified, comprises the following steps：
1) according to chemical formula BaTiO3(BT), barium carbonate and titanium dioxide are kept the temperature into 3h at 1150 DEG C after mixing,
BT ceramic powders are made.；
2) according to chemical formula K0.5Bi0.5TiO3(KBT), by potassium carbonate, bismuth oxide and titanium dioxide after mixing 950
4h is kept the temperature at DEG C, KBT ceramic powders are made.
3) according to chemical formula KNbO3(KN), potassium carbonate and niobium pentaoxide are kept the temperature into 2h at 800 DEG C after mixing,
Potassium niobate ceramic powder is made.
4) by BT ceramic powders, KBT ceramic powders and potassium niobate powder according to 0.96 (0.92BaTiO of chemical formula3-0.08
(K1/2Bi1/2)TiO3)-0.04KNbO3Dispensing, is uniformly mixed by the use of deionized water as ball-milling medium ball milling 6h, then at 80 DEG C
Drying, after tabletting, shaping, insulation 2h sinters porcelain at 1170 DEG C, obtains high energy storage density ceramic material.
Embodiment 2
A kind of preparation method for the BT-KBT base energy storage ceramic materials that potassium niobate is modified, comprises the following steps：
1) according to chemical formula BaTiO3(BT), barium carbonate and titanium dioxide are kept the temperature into 3h at 1150 DEG C after mixing,
BT ceramic powders are made.；
2) according to chemical formula K0.5Bi0.5TiO3(KBT), by potassium carbonate, bismuth oxide and titanium dioxide after mixing 950
4h is kept the temperature at DEG C, KBT ceramic powders are made.
3) according to chemical formula KNbO3(KN), potassium carbonate and niobium pentaoxide are kept the temperature into 2h at 800 DEG C after mixing,
Potassium niobate ceramic powder is made.
4) by BT ceramic powders, KBT ceramic powders and potassium niobate powder according to 0.96 (0.92BaTiO of chemical formula3-0.08
(K1/2Bi1/2)TiO3)-0.04KNbO3Dispensing, is uniformly mixed by the use of deionized water as ball-milling medium ball milling 6h, then at 80 DEG C
Drying, after tabletting, shaping, insulation 4h sinters porcelain at 1170 DEG C, obtains high energy storage density ceramic material.
Embodiment 3
A kind of preparation method for the BT-KBT base energy storage ceramic materials that potassium niobate is modified, comprises the following steps：
1) according to chemical formula BaTiO3(BT), barium carbonate and titanium dioxide are kept the temperature into 3h at 1150 DEG C after mixing,
BT ceramic powders are made.；
2) according to chemical formula K0.5Bi0.5TiO3(KBT), by potassium carbonate, bismuth oxide and titanium dioxide after mixing 950
4h is kept the temperature at DEG C, KBT ceramic powders are made.
3) according to chemical formula KNbO3(KN), potassium carbonate and niobium pentaoxide are kept the temperature into 2h at 800 DEG C after mixing,
Potassium niobate ceramic powder is made.
4) by BT ceramic powders, KBT ceramic powders and potassium niobate powder according to 0.96 (0.92BaTiO of chemical formula3-0.08
(K1/2Bi1/2)TiO3)-0.04KNbO3Dispensing, is uniformly mixed by the use of deionized water as ball-milling medium ball milling 6h, then at 80 DEG C
Drying, after tabletting, shaping, insulation 6h sinters porcelain at 1170 DEG C, obtains high energy storage density ceramic material.
Embodiment 4
A kind of preparation method for the BT-KBT base energy storage ceramic materials that potassium niobate is modified, comprises the following steps：
1) according to chemical formula BaTiO3(BT), barium carbonate and titanium dioxide are kept the temperature into 3h at 1150 DEG C after mixing,
BT ceramic powders are made.；
2) according to chemical formula K0.5Bi0.5TiO3(KBT), by potassium carbonate, bismuth oxide and titanium dioxide after mixing 950
4h is kept the temperature at DEG C, KBT ceramic powders are made.
3) according to chemical formula KNbO3(KN), potassium carbonate and niobium pentaoxide are kept the temperature into 2h at 800 DEG C after mixing,
Potassium niobate ceramic powder is made.
4) by BT ceramic powders, KBT ceramic powders and potassium niobate powder according to 0.92 (0.92BaTiO of chemical formula3-0.08
(K1/2Bi1/2)TiO3)-0.08KNbO3Dispensing, is uniformly mixed by the use of deionized water as ball-milling medium ball milling 6h, then at 80 DEG C
Drying, after tabletting, shaping, insulation 2h sinters porcelain at 1170 DEG C, obtains high energy storage density ceramic material.
Embodiment 5
A kind of preparation method for the BT-KBT base energy storage ceramic materials that potassium niobate is modified, comprises the following steps：
1) according to chemical formula BaTiO3(BT), barium carbonate and titanium dioxide are kept the temperature into 3h at 1150 DEG C after mixing,
BT ceramic powders are made.；
2) according to chemical formula K0.5Bi0.5TiO3(KBT), by potassium carbonate, bismuth oxide and titanium dioxide after mixing 950
4h is kept the temperature at DEG C, KBT ceramic powders are made.
3) according to chemical formula KNbO3(KN), potassium carbonate and niobium pentaoxide are kept the temperature into 2h at 800 DEG C after mixing,
Potassium niobate ceramic powder is made.
4) by BT ceramic powders, KBT ceramic powders and potassium niobate powder according to 0.92 (0.92BaTiO of chemical formula3-0.08
(K1/2Bi1/2)TiO3)-0.08KNbO3Dispensing, is uniformly mixed by the use of deionized water as ball-milling medium ball milling 6h, then at 80 DEG C
Drying, after tabletting, shaping, insulation 4h sinters porcelain at 1170 DEG C, obtains high energy storage density ceramic material.
Embodiment 6
A kind of preparation method for the BT-KBT base energy storage ceramic materials that potassium niobate is modified, comprises the following steps：
1) according to chemical formula BaTiO3(BT), barium carbonate and titanium dioxide are kept the temperature into 3h at 1150 DEG C after mixing,
BT ceramic powders are made.；
2) according to chemical formula K0.5Bi0.5TiO3(KBT), by potassium carbonate, bismuth oxide and titanium dioxide after mixing 950
4h is kept the temperature at DEG C, KBT ceramic powders are made.
3) according to chemical formula KNbO3(KN), potassium carbonate and niobium pentaoxide are kept the temperature into 2h at 800 DEG C after mixing,
Potassium niobate ceramic powder is made.
4) by BT ceramic powders, KBT ceramic powders and potassium niobate powder according to 0.92 (0.92BaTiO of chemical formula3-0.08
(K1/2Bi1/2)TiO3)-0.08KNbO3Dispensing, is uniformly mixed by the use of deionized water as ball-milling medium ball milling 6h, then at 80 DEG C
Drying, after tabletting, shaping, insulation 6h sinters porcelain at 1170 DEG C, obtains high energy storage density ceramic material.
Embodiment 7
A kind of preparation method for the BT-KBT base energy storage ceramic materials that potassium niobate is modified, comprises the following steps：
1) according to chemical formula BaTiO3(BT), barium carbonate and titanium dioxide are kept the temperature into 3h at 1150 DEG C after mixing,
BT ceramic powders are made.；
2) according to chemical formula K0.5Bi0.5TiO3(KBT), by potassium carbonate, bismuth oxide and titanium dioxide after mixing 950
4h is kept the temperature at DEG C, KBT ceramic powders are made.
3) according to chemical formula KNbO3(KN), potassium carbonate and niobium pentaoxide are kept the temperature into 2h at 800 DEG C after mixing,
Potassium niobate ceramic powder is made.
4) by BT ceramic powders, KBT ceramic powders and potassium niobate powder according to 0.90 (0.92BaTiO of chemical formula3-0.08
(K1/2Bi1/2)TiO3)-0.10KNbO3Dispensing, is uniformly mixed by the use of deionized water as ball-milling medium ball milling 6h, then at 80 DEG C
Drying, after tabletting, shaping, insulation 2h sinters porcelain at 1170 DEG C, obtains high energy storage density ceramic material.
Embodiment 8
A kind of preparation method for the BT-KBT base energy storage ceramic materials that potassium niobate is modified, comprises the following steps：
1) according to chemical formula BaTiO3(BT), barium carbonate and titanium dioxide are kept the temperature into 3h at 1150 DEG C after mixing,
BT ceramic powders are made.；
2) according to chemical formula K0.5Bi0.5TiO3(KBT), by potassium carbonate, bismuth oxide and titanium dioxide after mixing 950
4h is kept the temperature at DEG C, KBT ceramic powders are made.
3) according to chemical formula KNbO3(KN), potassium carbonate and niobium pentaoxide are kept the temperature into 2h at 800 DEG C after mixing,
Potassium niobate ceramic powder is made.
4) by BT ceramic powders, KBT ceramic powders and potassium niobate powder according to 0.90 (0.92BaTiO of chemical formula3-0.08
(K1/2Bi1/2)TiO3)-0.10KNbO3Dispensing, is uniformly mixed by the use of deionized water as ball-milling medium ball milling 6h, then at 80 DEG C
Drying, after tabletting, shaping, insulation 4h sinters porcelain at 1170 DEG C, obtains high energy storage density ceramic material.
Embodiment 9
A kind of preparation method for the BT-KBT base energy storage ceramic materials that potassium niobate is modified, comprises the following steps：
1) according to chemical formula BaTiO3(BT), barium carbonate and titanium dioxide are kept the temperature into 3h at 1150 DEG C after mixing,
BT ceramic powders are made.；
2) according to chemical formula K0.5Bi0.5TiO3(KBT), by potassium carbonate, bismuth oxide and titanium dioxide after mixing 950
4h is kept the temperature at DEG C, KBT ceramic powders are made.
3) according to chemical formula KNbO3(KN), potassium carbonate and niobium pentaoxide are kept the temperature into 2h at 800 DEG C after mixing,
Potassium niobate ceramic powder is made.
4) by BT ceramic powders, KBT ceramic powders and potassium niobate powder according to 0.90 (0.92BaTiO of chemical formula3-0.08
(K1/2Bi1/2)TiO3)-0.10KNbO3Dispensing, is uniformly mixed by the use of deionized water as ball-milling medium ball milling 6h, then at 80 DEG C
Drying, after tabletting, shaping, insulation 6h sinters porcelain at 1170 DEG C, obtains high energy storage density ceramic material.
Referring to Fig. 1, it is the ferroelectric hysteresis loop figure of the ceramics sample prepared in embodiment 1, the sample as we can see from the figure
Energy storage density is up to 0.93J/cm3, energy storage efficiency is up to 44.38%.Fig. 2 is the electric hysteresis of the ceramics sample prepared in embodiment 4
Loop line figure, the energy storage density of the sample is up to 0.89J/cm as we can see from the figure3, energy storage efficiency is up to 55.62%.Fig. 3 is
The ferroelectric hysteresis loop figure of the ceramics sample prepared in embodiment 7, the energy storage density of the sample is up to 0.97J/ as we can see from the figure
cm3, energy storage efficiency is up to 55.1%.
Claims (9)
- A kind of 1. BT-KBT base energy storage ceramics that potassium niobate is modified, it is characterised in that the chemistry of the BT-KBT bases energy storage ceramic Form and be：(1-x)(0.92BaTiO3-0.08(K1/2Bi1/2)TiO3)-xKNbO3；Wherein, x value ranges are 0.04~0.10.
- 2. the BT-KBT base energy storage ceramics that potassium niobate according to claim 1 is modified, it is characterised in that the BT-KBT bases The energy storage density of energy storage ceramic is 0.89~0.97J/cm3。
- 3. the preparation method for the BT-KBT base energy storage ceramics that a kind of potassium niobate is modified, it is characterised in that by BT ceramic powders, KBT Ceramic powder and potassium niobate powder are according to chemical formula (1-x) (0.92BaTiO3-0.08(K1/2Bi1/2)TiO3)-xKNbO3Dispensing, Aftershaping is uniformly mixed, 2~6h is kept the temperature at 1130~1170 DEG C, sinters porcelain into, BT-KBT based high energy storage densities ceramics are made Material；Wherein, x value ranges are 0.04~0.10.
- 4. the preparation method for the BT-KBT base energy storage ceramics that potassium niobate according to claim 3 is modified, it is characterised in that institute Stating uniformly mixed is realized by ball milling, and is used as ball-milling medium using deionized water.
- 5. the preparation method for the BT-KBT base energy storage ceramics that potassium niobate according to claim 4 is modified, it is characterised in that institute The time for stating ball milling is 6~8h.
- 6. the preparation method for the BT-KBT base energy storage ceramics that potassium niobate according to claim 4 is modified, it is characterised in that mixed Dried after closing uniformly at 75 DEG C -90 DEG C.
- 7. the preparation method for the BT-KBT base energy storage ceramics that the potassium niobate according to any one in claim 3~6 is modified, It is characterized in that, the BT ceramic powders are made by the following method：According to chemical formula BaTiO3Metering proportion, barium carbonate and titanium dioxide are kept the temperature into 3h at 1150 DEG C after mixing, make Obtain BT ceramic powders.
- 8. the preparation method for the BT-KBT base energy storage ceramics that the potassium niobate according to any one in claim 3~6 is modified, It is characterized in that, the KBT ceramic powders are made by the following method：According to chemical formula K0.5Bi0.5TiO3Metering proportion, by potassium carbonate, bismuth oxide and titanium dioxide after mixing at 950 DEG C Lower insulation 4h, is made KBT ceramic powders.
- 9. the preparation method for the BT-KBT base energy storage ceramics that the potassium niobate according to any one in claim 3~6 is modified, It is characterized in that, the potassium niobate ceramic powder is made by the following method：According to chemical formula KNbO3Metering proportion, potassium carbonate and niobium pentaoxide are kept the temperature into 2h at 800 DEG C after mixing, make Obtain potassium niobate ceramic powder.
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