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Ceramic material with high energy storage density and energy storage efficiency and preparation method thereof

A technology with high energy storage density and energy storage efficiency, applied in the field of potassium sodium niobate-based lead-free ceramic materials and preparation, can solve the problems of restricting the actual use of materials, low energy storage density and energy storage efficiency, etc., and achieves strong practicability , the effect of low preparation cost and simple preparation process

Inactive Publication Date: 2015-12-23
AIR FORCE UNIV PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, lead-free energy storage ceramic materials are mainly concentrated in BaTiO 3 , SrTiO 3 , CaTiO 3 and (Bi 0.5 Na 0.5 )TiO 3 However, the energy storage density and energy storage efficiency of these materials are still low, which limits the practical use of these materials

Method used

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  • Ceramic material with high energy storage density and energy storage efficiency and preparation method thereof
  • Ceramic material with high energy storage density and energy storage efficiency and preparation method thereof
  • Ceramic material with high energy storage density and energy storage efficiency and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] S11, after drying the analytically pure anhydrous potassium carbonate, anhydrous sodium carbonate, niobium pentoxide, magnesium oxide and bismuth trioxide at 120-150°C for 5 hours, press the chemical formula 0.92(K 0.2 Na 0.8 )NbO 3 -0.08Bi(Mg 2 / 3 Nb 1 / 3 )O 3 The stoichiometric ratio in the above-mentioned each raw material is weighed and mixed to obtain a mixture;

[0026] S12, the mixture obtained in step S11 is placed in ethanol with ZrO 2 The ball is a medium planetary ball milled for 24 hours, dried to obtain a dry powder;

[0027] S13, pre-calcining the obtained dry powder in air at 850°C for 2 hours, grinding and sieving to obtain powder A;

[0028] S14. Pre-fire the obtained powder A in air at 850°C for 2 hours again, grind and sieve again to obtain powder B;

[0029] S15. Planetary ball mill the obtained powder B in ethanol for 24 hours, after drying the powder, add polyvinyl alcohol to 5% of the powder mass to granulate;

[0030] S16, dry pressing the ...

Embodiment 2

[0038] S21, after drying analytically pure anhydrous potassium carbonate, anhydrous sodium carbonate, niobium pentoxide, magnesium oxide and bismuth trioxide at 120-150° C. for 5 hours, press the chemical formula 0.92 (K 0.2 Na 0.8 )NbO 3 -0.08Bi(Mg 2 / 3 Nb 1 / 3 )O 3 The stoichiometric ratio in the above-mentioned each raw material is weighed and mixed to obtain a mixture;

[0039] S22, the mixture obtained in step S21 is placed in ethanol with ZrO 2 The ball is a medium planetary ball milled for 24 hours, dried to obtain a dry powder;

[0040] S23, pre-calcining the obtained dry powder in air at 900°C for 2 hours, grinding and sieving to obtain powder A;

[0041] S24. The obtained powder A was pre-fired again in the air at 850° C. for 2 hours, and the powder B was obtained after grinding and sieving again;

[0042] S25, planetary ball milling the obtained powder B in ethanol for 24 hours, after drying the powder, adding polyvinyl alcohol to 5% of the powder mass to granula...

Embodiment 3

[0051] S31, after drying analytically pure anhydrous potassium carbonate, anhydrous sodium carbonate, niobium pentoxide, magnesium oxide and bismuth trioxide at 120-150° C. for 5 hours, according to the chemical formula 0.90 (K 0.4 Na 0.6 )NbO 3 -0.10Bi(Mg 2 / 3 Nb 1 / 3 )O 3 The stoichiometric ratio in the above-mentioned each raw material is weighed and mixed to obtain a mixture;

[0052] S32, the mixture obtained in step S31 is placed in ethanol with ZrO 2 The ball is a medium planetary ball milled for 24 hours, dried to obtain a dry powder;

[0053] S33, pre-calcining the obtained dry powder in air at 950°C for 2 hours, grinding and sieving to obtain powder A;

[0054] S34. The obtained powder A was pre-fired again in air at 950° C. for 2 hours, and the powder B was obtained after grinding and sieving again;

[0055] S35. Planetary ball mill the obtained powder B in ethanol for 24 hours, after drying the powder, add polyvinyl alcohol to 5% of the powder mass to granulat...

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Abstract

The invention discloses a ceramic material with high energy storage density and energy storage efficiency and a preparation method thereof. The chemical formula of the ceramic material is (1-x)(KyNal-y)NbO3-xBi(Mg2 / 3Nb1 / 3)O3, wherein x is greater than or equal to 0.08 and less than or equal to 0.5, and y is greater than or equal to 0.2 and less than or equal to 0.8. By adding Bi(Mg2 / 3Nb1 / 3)O3, the breakdown strength of the (KyNal-y)NbO3-based ceramic is enhanced remarkably, reaching 240kV / cm, and the effective energy storage density is 0.59J / cm<3> to 1.66J / cm<3>, and the energy storage efficiency is 49.4 to 95 percent; by batching, drying, grinding, secondary presintering, granulation, forming, sintering, grinding and silvered electrode sintering, the ceramic material is obtained, and the preparation process is simple; the cost is low; no pollution is produced, and the ceramic material has the advantages of high energy storage density, high energy storage efficiency, simple preparation process, low preparation cost and high practicability.

Description

technical field [0001] The invention relates to the technical field of dielectric energy storage ceramic materials, in particular to a potassium sodium niobate-based lead-free ceramic material with high energy storage density and high energy storage efficiency and a preparation method thereof. Background technique [0002] Pulse power technology is an emerging technology produced in the 1930s and developed rapidly since the 1960s. It is to slowly input energy with a small power into a device that can store energy for a long time, and compress and convert the energy. Electrophysical technology that releases extremely high power density to the load in a very short time (the shortest can be nanoseconds). Pulse power technology has been used to develop new weapons and equipment with high energy density, such as electromagnetic / electrothermal guns, laser weapons, high-power microwave weapons, particle beam weapons, electromagnetic pulse bombs and other weapons and equipment. As ...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/622
Inventor 杜红亮屈绍波马华王甲富王军庞永强
Owner AIR FORCE UNIV PLA
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