CN106495687A - A kind of existing fringing field, dielectric ceramic of high-energy-density and preparation method thereof - Google Patents

A kind of existing fringing field, dielectric ceramic of high-energy-density and preparation method thereof Download PDF

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CN106495687A
CN106495687A CN201610959974.1A CN201610959974A CN106495687A CN 106495687 A CN106495687 A CN 106495687A CN 201610959974 A CN201610959974 A CN 201610959974A CN 106495687 A CN106495687 A CN 106495687A
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energy
dielectric ceramic
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刘泳斌
王妍
高景晖
钟力生
于钦学
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Shaanxi Debai Jiezhi Technology Co.,Ltd.
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Xian Jiaotong University
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Abstract

The invention discloses dielectric ceramic of a kind of existing fringing field, high-energy-density and preparation method thereof, the chemical formula of the dielectric ceramic is (1 x) BaTiO3‑xBaSnO3, x is molar percentage, wherein 0.03≤x≤0.15, preparation method of the present invention using solid phase synthesis, has obtained the dielectric ceramic with high energy-storage property under existing fringing field, and the composition and processing step of the present invention is simple, easily operated, reproducible;It is mainly used in the fields such as the portable and wearable electronic of high integration miniaturization.

Description

A kind of existing fringing field, dielectric ceramic of high-energy-density and preparation method thereof
Technical field
The invention belongs to field of electronic ceramic materials, and in particular to a kind of existing fringing field, the dielectric ceramic of high-energy-density and Its preparation method.
Background technology
In the environment of fossil energy worsening shortages and global warming, energy storage is a key of reasonable energy utilization Technology.In modern industry and social life, electric energy is main energetic medium, and it is the weight of effective use of energy sources which is carried out storing Want method.In electrical power storage method, conventional energy storage device has rechargeable battery, ultracapacitor, fuel cell etc., and these set Getting everything ready has very high energy density, but the discharge and recharge time is slow.Comparatively speaking, energy-storage capacitor has the spy of fast charging and discharging Point, therefore has huge application prospect in hybrid vehicle, pulse-power apparatus etc..
At present, most of energy-storage capacitor is applied in high electric field (6000kV/cm) area, and this is strong to puncturing for dielectric substance Degree proposes very high request, while the insulation system to electric capacity proposes very high dielectric strength requirement.Particularly Highgrade integration, There is larger application limitation in the portable or wearable device of miniaturization.So, high-energy of the development and application in existing fringing field intensity The novel energy-storing material of density is very urgent.
Content of the invention
It is an object of the invention to provide dielectric ceramic of a kind of existing fringing field, high-energy-density and preparation method thereof, with gram The defect that above-mentioned prior art is present is taken, the method that the present invention is modulated by composition is lured in barium phthalate base binary material system Critical effect is sent, so as to the dielectric constant of system has been significantly increased, has been obtained in existing fringing field intensity (10kV/cm), higher Energy density (31mJ/cm3) dielectric ceramic.
For reaching above-mentioned purpose, the present invention is adopted the following technical scheme that:
A kind of existing fringing field, the dielectric ceramic of high-energy-density, the chemical formula of the dielectric ceramic is (1-x) BaTiO3- xBaSnO3, wherein 0.03≤x≤0.15, x is mole percent.
Further, the chemical formula of the dielectric ceramic is (1-x) BaTiO3-xBaSnO3, wherein x=0.105, x for mole Percent.
A kind of existing fringing field, the preparation method of the dielectric ceramic of high-energy-density, comprise the following steps:
(1) chemical formula (1-x) BaTiO is pressed3-xBaSnO3The proportioning of middle each element weighs raw material BaCO3、TiO2And SnO2, its In 0.03≤x≤0.15, x is mole percent;
(2) ball milling, drying and grinding will be carried out successively after the raw material for weighing mixing, then crosses 60 mesh sieves and obtain powder;
(3) by powder pre-burning in atmosphere, room temperature is naturally cooled to, preburning powdered material is obtained;
(4) secondary ball milling is carried out after grind preburning powdered material, obtain dry powder after drying;
(5) binding agent mix homogeneously are added after grind dry powder, particle diameter is then filtered out for 0.15mm extremely The pelletize powder of 0.28mm;
(6) pressing mold molding after the drying of pelletize powder is obtained cylindrical blank;
(7) binding agent of cylindrical blank is discharged, then at 1425~1475 DEG C, sinters 3-5 hours, obtain burned Potsherd;
(8) conductive silver paste is coated after polish smooth burned potsherd upper and lower surface, then carry out burning Electrode treatment and obtain Arrive existing fringing field, the dielectric ceramic of high-energy-density.
Further, in step (2), Ball-milling Time is 4 hours, and rotating speed is 40-50 rev/min, and drying temperature is 80 DEG C, when Between be 3 hours;In step (4), the secondary ball milling time is 8 hours, and rotating speed is 40-50 rev/min, and drying temperature is 80 DEG C, and the time is 3 hours.
Further, in step (3), calcined temperature is 1350 DEG C, is incubated 4 hours.
Further, in step (5), binding agent is PVA, and addition is the 5-10% for drying powder quality.
Further, in step (6), drying temperature is 80 DEG C, and drying time is 5-10 minutes;Pressing mold molding is specially:Will Pelletize powder after drying is poured in the stainless steel mould of a diameter of 10mm, and pressurize under 30MPa pressure is shaped to cylinder in 90 seconds Shape blank.
Further, cylindrical blank is incubated 2 hours to discharge binding agent in 600 DEG C in step (7).
Further, burn Electrode treatment to be specially in step (8):800 DEG C are warming up to after coating conductive silver paste in atmosphere And 20 minutes are incubated, then naturally cool to room temperature.
Compared with prior art, the present invention has following beneficial technique effect:
The present invention has been obtained a kind of dielectric ceramic of new existing fringing field high-energy-density, and the pottery has phase under existing fringing field To higher energy storage density.Method of the inventive method using solid phase synthesis, based on Barium metatitanate. (BT), doping Sn obtains titanium Sour barium-barium stannate (BT-BS), obtains high-dielectric constant, the dielectric ceramic of existing fringing field high energy storage density.The composition of the present invention and technique Step is simple, easily operated, reproducible, high yield rate.Obtain in x=0.105 through gradient experiment, i.e. 0.89BaTiO3- 0.105BaSnO3Place's capacitor energy storage density has peak, is 31mJ/cm under existing fringing field (10kV/cm)3, the parameter values Considerably beyond other conventional capacitance energy storage materials.
Description of the drawings
Fig. 1 is the relation of the polarization intensity with electric field of the dielectric ceramic that embodiment 1 is obtained;
Fig. 2 is contrast of the different materials energy storage density of embodiment 2 under same electric field.
Specific embodiment
With reference to being described in further detail to the present invention:
A kind of existing fringing field, the dielectric ceramic of high-energy-density, the chemical formula of the dielectric ceramic is (1-x) BaTiO3- xBaSnO3, x is molar percentage, wherein 0.03≤x≤0.15, preferred x=0.105.
A kind of existing fringing field, the preparation method of the dielectric ceramic of high-energy-density, comprise the following steps:
(1) chemical formula (1-x) BaTiO is pressed3-xBaSnO3The proportioning of middle each element weighs raw material BaCO3、TiO2And SnO2, its In 0.03≤x≤0.15;
(2) will be put in ball grinder after the raw material for weighing mixing, add ball milling solvent dehydrated alcohol and agate ball, ball milling 4 Hour, rotational speed of ball-mill is 40-50 rev/min, then compound is put in baking oven 80 DEG C dries 3 hours, places in mortar and grinds, Then 60 mesh sieves are crossed and obtains powder;
(3) powder that step (2) is obtained is put in crucible, is compacted, adds a cover;In 1350 DEG C of pre-burnings in Muffle furnace, protect Temperature 4 hours, naturally cools to room temperature, comes out of the stove, obtain preburning powdered material;
(4) preburning powdered material that step (3) is obtained is ground to form fine powder in mortar, is loaded in ball grinder, add ball milling to be situated between Matter dehydrated alcohol, carries out secondary ball milling, and rotating speed is 40-50 rev/min, continues 8 hours, and compound is put into 80 DEG C of drying in baking oven Obtain within 3 hours drying powder;
(5) the drying powder that step (4) is obtained is ground in mortar, adds binder PVA, and PVA accounts for drying powder The 5-10% of quality, mix homogeneously cross the pelletize powder for filtering out that particle diameter is 0.15mm to 0.28mm;
(6) the pelletize powder that step (5) is obtained is put in baking oven and 5-10 minutes is dried at a temperature of 80 DEG C, take powder and fall Enter in the stainless steel mould of diameter 10mm, pressurize under 30MPa pressure is shaped to cylindrical blank in 90 seconds;
(7) the cylindrical blank that step (6) is obtained is put in Muffle furnace, temperature rises to 600 DEG C, is incubated 2 hours, discharged PVA;
(8) sample after dumping in step (7) is put in crucible, material is buried with similar powder and bury burning, 1425~ Sinter in 1475 DEG C, be incubated 4 hours, room temperature naturally cooled to stove, obtain burned potsherd.
(9) conductive silver paste is coated after polish smooth obtained potsherd upper and lower surface, be warming up to 800 DEG C of guarantors in atmosphere Temperature naturally cooled to room temperature after 20 minutes, obtained the dielectric ceramic of a kind of existing fringing field, high-energy-density.
The energy storage characteristic that the ceramic capacitor is measured using ferroelectricity work station (Radiant technology).By ceramic electrical Container is placed in the fixture of ferroelectricity work station two-electrode system, UNICOM work station voltage source and capacitor upper/lower electrode.Entirely Two-electrode system is immersed in methyl-silicone oil prevents air flashover.Using ferroelectricity work station control voltage source, in ceramic capacitor Upper unipolar triangle voltage waveform E for applying 10Hz, a 10kV/cm.While applied voltage using work station survey Quantity collection system measures polarization intensity P of capacitor, the relation curve for going out polarization intensity and electric field intensity by computer drawing (ferroelectric hysteresis loop).According to the definition that capacitor stores energy, integration of the electric field intensity to polarization intensity is calculated by curve It is multiplied by a constant again and can obtains capacitor energy storage density Ue.
Present invention discover that in (1-x) BaTiO3-xBaSnO3Three Near The Critical Points of ferroelectric ceramics, ceramic material is in existing fringing field Under have larger energy density.This be due to ferroelectric ceramics at three critical points domain wall free energy minimization, pole under electric field action Easily deflection polarization, and store electric energy.The present invention passes through in BaTiO3Middle doping Sn, is in material by the method that composition is modulated Three Near The Critical Points, at that point the energy storage density of material can reach 31mJ/cm under existing fringing field (10kV/cm)3.Therefore can be with By on energy-storage travelling wave tube of the materials application in the equipment that portable He wearable electronic equipment etc. requires low-voltage-grade.
The present invention is described in further detail with reference to embodiment:
Embodiment 1
(1) chemical formula (1-x) BaTiO is pressed3-xBaSnO3The proportioning of middle each element weighs raw material BaCO3、TiO2And SnO2, its Middle x=0.03;
(2) will be put in ball grinder after the raw material for weighing mixing, add ball milling solvent dehydrated alcohol and agate ball, ball milling 4 Hour, rotational speed of ball-mill is 40 revs/min, then compound is put in baking oven 80 DEG C dries 3 hours, places in mortar and grinds, so Cross 60 mesh sieves afterwards and obtain powder;
(3) powder that step (2) is obtained is put in crucible, is compacted, adds a cover;In 1350 DEG C of pre-burnings in Muffle furnace, protect Temperature 4 hours, naturally cools to room temperature, comes out of the stove, obtain preburning powdered material;
(4) preburning powdered material that step (3) is obtained is ground to form fine powder in mortar, is loaded in ball grinder, add ball milling to be situated between Matter dehydrated alcohol, carries out secondary ball milling, and rotating speed is 40 revs/min, continues 8 hours, compound is put into 80 DEG C of drying 3 in baking oven little When obtain dry powder;
(5) the drying powder that step (4) is obtained is ground in mortar, adds binder PVA, and PVA accounts for drying powder The 5% of quality, mix homogeneously cross the pelletize powder for filtering out that particle diameter is 0.15mm to 0.28mm;
(6) the pelletize powder that step (5) is obtained is put in baking oven and is dried 5 minutes at a temperature of 80 DEG C, taken powder and pour into In the stainless steel mould of diameter 10mm, pressurize under 30MPa pressure is shaped to cylindrical blank in 90 seconds;
(7) the cylindrical blank that step (6) is obtained is put in Muffle furnace, temperature rises to 600 DEG C, is incubated 2 hours, discharged PVA;
(8) sample after dumping in step (7) is put in crucible, material is buried with similar powder and bury burning, in 1425 DEG C Sintering, is incubated 4 hours, naturally cools to room temperature with stove, obtain burned potsherd.
(9) conductive silver paste is coated after polish smooth obtained potsherd upper and lower surface, be warming up to 800 DEG C of guarantors in atmosphere Temperature naturally cooled to room temperature after 20 minutes, obtained the dielectric ceramic of a kind of existing fringing field, high-energy-density.
Embodiment 2
(1) chemical formula (1-x) BaTiO is pressed3-xBaSnO3The proportioning of middle each element weighs raw material BaCO3、TiO2And SnO2, its Middle x=0.09;
(2) will be put in ball grinder after the raw material for weighing mixing, add ball milling solvent dehydrated alcohol and agate ball, ball milling 4 Hour, rotational speed of ball-mill is 45 revs/min, then compound is put in baking oven 80 DEG C dries 3 hours, places in mortar and grinds, so Cross 60 mesh sieves afterwards and obtain powder;
(3) powder that step (2) is obtained is put in crucible, is compacted, adds a cover;In 1350 DEG C of pre-burnings in Muffle furnace, protect Temperature 4 hours, naturally cools to room temperature, comes out of the stove, obtain preburning powdered material;
(4) preburning powdered material that step (3) is obtained is ground to form fine powder in mortar, is loaded in ball grinder, add ball milling to be situated between Matter dehydrated alcohol, carries out secondary ball milling, and rotating speed is 45 revs/min, continues 8 hours, compound is put into 80 DEG C of drying 3 in baking oven little When obtain dry powder;
(5) the drying powder that step (4) is obtained is ground in mortar, adds binder PVA, and PVA accounts for drying powder The 6% of quality, mix homogeneously cross the pelletize powder for filtering out that particle diameter is 0.15mm to 0.28mm;
(6) the pelletize powder that step (5) is obtained is put in baking oven and is dried 7 minutes at a temperature of 80 DEG C, taken powder and pour into In the stainless steel mould of diameter 10mm, pressurize under 30MPa pressure is shaped to cylindrical blank in 90 seconds;
(7) the cylindrical blank that step (6) is obtained is put in Muffle furnace, temperature rises to 600 DEG C, is incubated 2 hours, discharged PVA;
(8) sample after dumping in step (7) is put in crucible, material is buried with similar powder and bury burning, in 1450 DEG C Sintering, is incubated 4 hours, naturally cools to room temperature with stove, obtain burned potsherd.
(9) conductive silver paste is coated after polish smooth obtained potsherd upper and lower surface, be warming up to 800 DEG C of guarantors in atmosphere Temperature naturally cooled to room temperature after 20 minutes, obtained the dielectric ceramic of a kind of existing fringing field, high-energy-density.
Embodiment 3
(1) chemical formula (1-x) BaTiO is pressed3-xBaSnO3The proportioning of middle each element weighs raw material BaCO3、TiO2And SnO2, its Middle x=0.1;
(2) will be put in ball grinder after the raw material for weighing mixing, add ball milling solvent dehydrated alcohol and agate ball, ball milling 4 Hour, rotational speed of ball-mill is 50 revs/min, then compound is put in baking oven 80 DEG C dries 3 hours, places in mortar and grinds, so Cross 60 mesh sieves afterwards and obtain powder;
(3) powder that step (2) is obtained is put in crucible, is compacted, adds a cover;In 1350 DEG C of pre-burnings in Muffle furnace, protect Temperature 4 hours, naturally cools to room temperature, comes out of the stove, obtain preburning powdered material;
(4) preburning powdered material that step (3) is obtained is ground to form fine powder in mortar, is loaded in ball grinder, add ball milling to be situated between Matter dehydrated alcohol, carries out secondary ball milling, and rotating speed is 50 revs/min, continues 8 hours, compound is put into 80 DEG C of drying 3 in baking oven little When obtain dry powder;
(5) the drying powder that step (4) is obtained is ground in mortar, adds binder PVA, and PVA accounts for drying powder The 10% of quality, mix homogeneously cross the pelletize powder for filtering out that particle diameter is 0.15mm to 0.28mm;
(6) the pelletize powder that step (5) is obtained is put in baking oven and is dried 8 minutes at a temperature of 80 DEG C, taken powder and pour into In the stainless steel mould of diameter 10mm, pressurize under 30MPa pressure is shaped to cylindrical blank in 90 seconds;
(7) the cylindrical blank that step (6) is obtained is put in Muffle furnace, temperature rises to 600 DEG C, is incubated 2 hours, discharged PVA;
(8) sample after dumping in step (7) is put in crucible, material is buried with similar powder and bury burning, in 1475 DEG C Sintering, is incubated 4 hours, naturally cools to room temperature with stove, obtain burned potsherd.
(9) conductive silver paste is coated after polish smooth obtained potsherd upper and lower surface, be warming up to 800 DEG C of guarantors in atmosphere Temperature naturally cooled to room temperature after 20 minutes, obtained the dielectric ceramic of a kind of existing fringing field, high-energy-density.
Embodiment 4
(1) chemical formula (1-x) BaTiO is pressed3-xBaSnO3The proportioning of middle each element weighs raw material BaCO3、TiO2And SnO2, its Middle x=0.105;
(2) will be put in ball grinder after the raw material for weighing mixing, add ball milling solvent dehydrated alcohol and agate ball, ball milling 4 Hour, rotational speed of ball-mill is 40 revs/min, then compound is put in baking oven 80 DEG C dries 3 hours, places in mortar and grinds, so Cross 60 mesh sieves afterwards and obtain powder;
(3) powder that step (2) is obtained is put in crucible, is compacted, adds a cover;In 1350 DEG C of pre-burnings in Muffle furnace, protect Temperature 4 hours, naturally cools to room temperature, comes out of the stove, obtain preburning powdered material;
(4) preburning powdered material that step (3) is obtained is ground to form fine powder in mortar, is loaded in ball grinder, add ball milling to be situated between Matter dehydrated alcohol, carries out secondary ball milling, and rotating speed is 40 revs/min, continues 8 hours, compound is put into 80 DEG C of drying 3 in baking oven little When obtain dry powder;
(5) the drying powder that step (4) is obtained is ground in mortar, adds binder PVA, and PVA accounts for drying powder The 8% of quality, mix homogeneously cross the pelletize powder for filtering out that particle diameter is 0.15mm to 0.28mm;
(6) the pelletize powder that step (5) is obtained is put in baking oven and is dried 5 to 10 minutes at a temperature of 80 DEG C, take powder Pour in the stainless steel mould of diameter 10mm, pressurize under 30MPa pressure is shaped to cylindrical blank in 90 seconds;
(7) the cylindrical blank that step (6) is obtained is put in Muffle furnace, temperature rises to 600 DEG C, is incubated 2 hours, discharged PVA;
(8) sample after dumping in step (7) is put in crucible, material is buried with similar powder and bury burning, in 1465 DEG C Sintering, is incubated 4 hours, naturally cools to room temperature with stove, obtain burned potsherd.
(9) conductive silver paste is coated after polish smooth obtained potsherd upper and lower surface, be warming up to 800 DEG C of guarantors in atmosphere Temperature naturally cooled to room temperature after 20 minutes, obtained the dielectric ceramic of a kind of existing fringing field, high-energy-density.
Embodiment 5
(1) chemical formula (1-x) BaTiO is pressed3-xBaSnO3The proportioning of middle each element weighs raw material BaCO3、TiO2And SnO2, its Middle x=0.12;
(2) will be put in ball grinder after the raw material for weighing mixing, add ball milling solvent dehydrated alcohol and agate ball, ball milling 4 Hour, rotational speed of ball-mill is 45 revs/min, then compound is put in baking oven 80 DEG C dries 3 hours, places in mortar and grinds, so Cross 60 mesh sieves afterwards and obtain powder;
(3) powder that step (2) is obtained is put in crucible, is compacted, adds a cover;In 1350 DEG C of pre-burnings in Muffle furnace, protect Temperature 4 hours, naturally cools to room temperature, comes out of the stove, obtain preburning powdered material;
(4) preburning powdered material that step (3) is obtained is ground to form fine powder in mortar, is loaded in ball grinder, add ball milling to be situated between Matter dehydrated alcohol, carries out secondary ball milling, and rotating speed is 45 revs/min, continues 8 hours, compound is put into 80 DEG C of drying 3 in baking oven little When obtain dry powder;
(5) the drying powder that step (4) is obtained is ground in mortar, adds binder PVA, and PVA accounts for drying powder The 10% of quality, mix homogeneously cross the pelletize powder for filtering out that particle diameter is 0.15mm to 0.28mm;
(6) the pelletize powder that step (5) is obtained is put in baking oven and is dried 6 minutes at a temperature of 80 DEG C, taken powder and pour into In the stainless steel mould of diameter 10mm, pressurize under 30MPa pressure is shaped to cylindrical blank in 90 seconds;
(7) the cylindrical blank that step (6) is obtained is put in Muffle furnace, temperature rises to 600 DEG C, is incubated 2 hours, discharged PVA;
(8) sample after dumping in step (7) is put in crucible, material is buried with similar powder and bury burning, in 1445 DEG C Sintering, is incubated 4 hours, naturally cools to room temperature with stove, obtain burned potsherd.
(9) conductive silver paste is coated after polish smooth obtained potsherd upper and lower surface, be warming up to 800 DEG C of guarantors in atmosphere Temperature naturally cooled to room temperature after 20 minutes, obtained the dielectric ceramic of a kind of existing fringing field, high-energy-density.
Embodiment 6
(1) chemical formula (1-x) BaTiO is pressed3-xBaSnO3The proportioning of middle each element weighs raw material BaCO3、TiO2And SnO2, its Middle x=0.15;
(2) will be put in ball grinder after the raw material for weighing mixing, add ball milling solvent dehydrated alcohol and agate ball, ball milling 4 Hour, rotational speed of ball-mill is 40 revs/min, then compound is put in baking oven 80 DEG C dries 3 hours, places in mortar and grinds, so Cross 60 mesh sieves afterwards and obtain powder;
(3) powder that step (2) is obtained is put in crucible, is compacted, adds a cover;In 1350 DEG C of pre-burnings in Muffle furnace, protect Temperature 4 hours, naturally cools to room temperature, comes out of the stove, obtain preburning powdered material;
(4) preburning powdered material that step (3) is obtained is ground to form fine powder in mortar, is loaded in ball grinder, add ball milling to be situated between Matter dehydrated alcohol, carries out secondary ball milling, and rotating speed is 50 revs/min, continues 8 hours, compound is put into 80 DEG C of drying 3 in baking oven little When obtain dry powder;
(5) the drying powder that step (4) is obtained is ground in mortar, adds binder PVA, and PVA accounts for drying powder The 5% of quality, mix homogeneously cross the pelletize powder for filtering out that particle diameter is 0.15mm to 0.28mm;
(6) the pelletize powder that step (5) is obtained is put in baking oven and is dried 5 minutes at a temperature of 80 DEG C, taken powder and pour into In the stainless steel mould of diameter 10mm, pressurize under 30MPa pressure is shaped to cylindrical blank in 90 seconds;
(7) the cylindrical blank that step (6) is obtained is put in Muffle furnace, temperature rises to 600 DEG C, is incubated 2 hours, discharged PVA;
(8) sample after dumping in step (7) is put in crucible, material is buried with similar powder and bury burning, in 1450 DEG C Sintering, is incubated 4 hours, naturally cools to room temperature with stove, obtain burned potsherd.
(9) conductive silver paste is coated after polish smooth obtained potsherd upper and lower surface, be warming up to 800 DEG C of guarantors in atmosphere Temperature naturally cooled to room temperature after 20 minutes, obtained the dielectric ceramic of a kind of existing fringing field, high-energy-density.
From the embodiment of the present invention 2 and dielectric ceramic 0.91BaTiO obtained in embodiment 43-0.09BaSnO3With 0.895BaTiO3-0.105BaSnO3, and capacitance energy storage material is contrasted for lead zirconate titanate (PZT), PMN-PT (PMNPT) above-mentioned various materials are made metal-insulator-gold and Kynoar-CTFE (P (VDF-CTFE)), Category structure capacitance, measures the energy storage characteristic of each capacitor using ferroelectricity work station (Radiant technology) and carries out Contrast.Respectively each capacitor is placed in the fixture of ferroelectricity work station two-electrode system, work station voltage source is connected with electricity Container upper/lower electrode.Whole two-electrode system is immersed in methyl-silicone oil and prevents air flashover.Using ferroelectricity work stand control electricity Potential source, applies unipolar triangle voltage waveform E of 10Hz, a 10kV/cm on ceramic capacitor.Applied voltage same When using work station measurement acquisition system measure capacitor polarization intensity P, by computer drawing go out polarization intensity with electricity The relation curve of field intensity, as shown in figure 1, the dielectric ceramic that the present invention is obtained is at room temperature, phase under existing fringing field (10kV/cm) Than there are highest polarization intensity (10 μ C/cm in other conventional energy storage materials2), while with minimum loss.
From the embodiment of the present invention 2, embodiment 3, embodiment 4 and dielectric ceramic 0.91BaTiO obtained in embodiment 53- 0.09BaSnO3、0.9BaTiO3-0.1BaSnO3、0.895BaTiO3-0.105BaSnO3And 0.88BaTiO3- 0.12BaSnO3, be PZT, PMNPT and P (VDF-CTFE) from contrast energy storage material, each material sample above-mentioned is calculated in room Under temperature, the data obtained is depicted as block diagram, as shown in Fig. 2 can see by energy density under the electric field of 10Hz, 10kV/cm Go out, dielectric ceramic prepared by the present invention has relative highest energy storage (31mJ/cm3), it is the twice of other conventional energy storage materials More than.

Claims (9)

1. the dielectric ceramic of a kind of existing fringing field, high-energy-density, it is characterised in that the chemical formula of the dielectric ceramic is (1-x) BaTiO3-xBaSnO3, wherein 0.03≤x≤0.15, x is mole percent.
2. a kind of existing fringing field according to claim 1, the dielectric ceramic of high-energy-density, it is characterised in that dielectric pottery The chemical formula of porcelain is (1-x) BaTiO3-xBaSnO3, wherein x=0.105, x are mole percent.
3. a kind of existing fringing field, the preparation method of the dielectric ceramic of high-energy-density, it is characterised in that comprise the following steps:
(1) chemical formula (1-x) BaTiO is pressed3-xBaSnO3The proportioning of middle each element weighs raw material BaCO3、TiO2And SnO2, wherein 0.03≤x≤0.15, x are mole percent;
(2) ball milling, drying and grinding will be carried out successively after the raw material for weighing mixing, then crosses 60 mesh sieves and obtain powder;
(3) by powder pre-burning in atmosphere, room temperature is naturally cooled to, preburning powdered material is obtained;
(4) secondary ball milling is carried out after grind preburning powdered material, obtain dry powder after drying;
(5) binding agent mix homogeneously is added after grind dry powder, then filters out particle diameter for 0.15mm's to 0.28mm Pelletize powder;
(6) pressing mold molding after the drying of pelletize powder is obtained cylindrical blank;
(7) binding agent of cylindrical blank is discharged, then at 1425~1475 DEG C, sinters 3-5 hours, obtain burned pottery Ceramics;
(8) coat conductive silver paste after polish smooth burned potsherd upper and lower surface, then carry out burn Electrode treatment obtain low Electric field, the dielectric ceramic of high-energy-density.
4. a kind of existing fringing field according to claim 3, the preparation method of the dielectric ceramic of high-energy-density, its feature exist In in step (2), Ball-milling Time is 4 hours, and rotating speed is 40-50 rev/min, and drying temperature is 80 DEG C, and the time is 3 hours;Step (4) in, the secondary ball milling time is 8 hours, and rotating speed is 40-50 rev/min, and drying temperature is 80 DEG C, and the time is 3 hours.
5. a kind of existing fringing field according to claim 3, the preparation method of the dielectric ceramic of high-energy-density, its feature exist In in step (3), calcined temperature is 1350 DEG C, is incubated 4 hours.
6. a kind of existing fringing field according to claim 3, the preparation method of the dielectric ceramic of high-energy-density, its feature exist In in step (5), binding agent is PVA, and addition is the 5-10% for drying powder quality.
7. a kind of existing fringing field according to claim 3, the preparation method of the dielectric ceramic of high-energy-density, its feature exist In in step (6), drying temperature is 80 DEG C, and drying time is 5-10 minutes;Pressing mold molding is specially:Pelletizing after by drying Material is poured in the stainless steel mould of a diameter of 10mm, and pressurize under 30MPa pressure is shaped to cylindrical blank in 90 seconds.
8. a kind of existing fringing field according to claim 3, the preparation method of the dielectric ceramic of high-energy-density, its feature exist In cylindrical blank is incubated 2 hours discharging binding agent in 600 DEG C in step (7).
9. a kind of existing fringing field according to claim 3, the preparation method of the dielectric ceramic of high-energy-density, its feature exist In in step (8), burning Electrode treatment is specially:It is warming up to 800 DEG C after coating conductive silver paste in atmosphere and is incubated 20 minutes, so After naturally cool to room temperature.
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CN107162583A (en) * 2017-07-05 2017-09-15 西安交通大学 The method that barium titanate based ceramic dielectric-temperature stability is improved based on component gradient
CN107162583B (en) * 2017-07-05 2020-05-22 西安交通大学 Method for improving dielectric temperature stability of barium titanate-based ceramic based on component gradient
CN107382308A (en) * 2017-07-17 2017-11-24 天津大学 A kind of anti-reduced form dielectric material of high-k
CN107500753A (en) * 2017-09-06 2017-12-22 天津大学 A kind of low-loss titanium barium stannate dielectric material
CN108610040A (en) * 2018-04-27 2018-10-02 天津大学 A method of reducing titanium barium stannate system dielectric loss under reducing atmosphere
CN108610041A (en) * 2018-04-27 2018-10-02 天津大学 A method of improving titanium barium stannate dielectric properties under reducing atmosphere
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