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Preparation method of dielectric energy storage ceramic material

A technology of dielectric energy storage ceramics and ceramic materials, applied in ceramics, inorganic insulators, etc., can solve the problems of weak application value, and achieve the effects of large saturation polarization, low residual polarization, and high energy storage density

Inactive Publication Date: 2015-06-03
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But pure Bi 0.5 Na 0.5 TiO 3 The remanent polarization of the material is close to the saturation polarization, according to figure 1 As shown, the calculated energy storage density W 1 Small, weak application value

Method used

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  • Preparation method of dielectric energy storage ceramic material
  • Preparation method of dielectric energy storage ceramic material
  • Preparation method of dielectric energy storage ceramic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Bi with a purity of 99.99% is used 2 o 3 , 99.8% Na 2 CO 3 ,99.8% TiO 2 The raw materials weigh 95.99, 15.04, and 45.33 grams respectively, and then put them into the ball milling tank for ball milling and mixing. When ball milling, the volume of raw materials: the volume of agate balls: the volume ratio of ball milling meson anhydrous ethanol is approximately equal to 1:1:1.5 ball milling 10 hours, and then the ball-milled raw materials were put into an oven and baked at 150°C for 10 hours. After drying, the raw material is pressed into a raw material body with a diameter of 40mm by a tablet machine at 10Mpa, and the green body after the tablet is placed in a muffle furnace and kept at 850°C for 2 hours to synthesize a pure perovskite structure ( Bi 0.5 Na 0.5 )TiO 3 .

[0028] (2) similar step (1) adopts the K of purity 99% 2 CO 3 , Na 2 CO 3 , Li 2 CO 3 , 99.9% Nb 2 o 5 The raw materials weighed 7.76, 5.96, 0.53, and 14.78 grams respectively, and ...

Embodiment 2

[0032] (1) According to 0.9(Bi 0.5 Na 0.5 )TiO 3 -0.1K 0.47 Na 0.47 Li 0.06 NbO 3 The stoichiometric ratio weighs (Bi) that obtains in embodiment one 0.5 Na 0.5 )TiO 3 and K 0.47 Na 0.47 Li 0.06 NbO 3 Each powder is 9.2 and 0.8 grams, and (Bi 0.5 Na 0.5 )TiO 3 and K 0.47 Na 0.47 Li 0.06 NbO 3 The powder is put into a ball mill jar for ball milling for 10 hours, and then put into an oven for drying after ball milling. Then (Bi 0.5 Na 0.5 )TiO 3 and K 0.47 Na 0.47 Li 0.06 NbO 3 The mixed powder was compressed at 20Mpa, put into a muffle furnace and kept at 850°C for 2 hours to synthesize 0.9(Bi 0.5 Na 0.5 )TiO 3 -0.1K 0.47 Na 0.47 Li 0.06 NbO 3 phase structure. The obtained 0.9(Bi 0.5 Na 0.5 )TiO 3 -0.1K 0.47 Na 0.47 Li 0.06 NbO 3 The block is crushed, ball milled and dried.

[0033] (4) adding the dried powder obtained in step (3) to polyvinyl alcohol solution to make binder granulation, the solubility of polyvinyl alcohol is 5%, and the...

Embodiment 3

[0035] (1) According to 0.88(Bi 0.5 Na 0.5 )TiO 3 -0.12K 0.47 Na 0.47 Li 0.06 NbO 3 The stoichiometric ratio weighs (Bi) that obtains in embodiment one 0.5 Na 0.5 )TiO 3 and K 0.47 Na 0.47 Li 0.06 NbO 3 Each powder is 9 and 1 gram, and (Bi 0.5 Na 0.5 )TiO 3 and K 0.47 Na 0.47 Li 0.06 NbO 3 The powder is put into a ball mill jar for ball milling for 10 hours, and then put into an oven for drying after ball milling. Then (Bi 0.5 Na 0.5 )TiO 3 and K 0.47 Na 0.47 Li 0.06 NbO 3 The mixed powder was compressed at 20Mpa, put into a muffle furnace and kept at 850°C for 2 hours to synthesize 0.88(Bi 0.5 Na 0.5 )TiO 3 -0.12K 0.47 Na 0.47 Li 0.06 NbO 3 phase structure. The obtained 0.9(Bi 0.5 Na 0.5 )TiO 3 -0.12K 0.47 Na 0.47 Li 0.06 NbO 3 The block is crushed, ball milled and dried.

[0036] (4) adding the dried powder obtained in step (3) to polyvinyl alcohol solution to make binder granulation, the solubility of polyvinyl alcohol is 5%, and the...

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Abstract

The invention discloses a dielectric energy storage ceramic material which is characterized by comprising a two-phase solid solution, wherein the first phase is (Bi0.5Na0.5)TiO3; the second phase is K0.47Na0.47Li0.06NbO3; the chemical formula of the dielectric energy storage ceramic material is (1-x)(Bi0.5Na0.5)TiO3-xK0.47Na0.47Li0.06NbO3, wherein x is greater than or equal to 0.06 and less than or equal to 0.12. The invention further discloses a preparation method of the material. Compared with the prior art, the prepared material has high energy storage density.

Description

technical field [0001] The invention relates to a material for storing electric energy, in particular to a dielectric energy storage ceramic material, and also discloses a preparation method of the material. Background technique [0002] In recent years, the application prospects of high energy density storage materials in electric vehicles, mobile electronic devices, and power systems have attracted great attention. One of the important ways to store energy is to use the capacitance of the dielectric to charge and discharge. Compared with other energy storage methods, using dielectrics to store electrical energy has many advantages, such as fast charging and discharging speed, very large discharge power, and very high electrical energy storage density. [0003] In the prior art, in order to realize the use of dielectric materials to store electric energy, there are various materials, such as the Chinese invention patent "Preparation method of barium strontium titanate-base...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B3/12C04B35/475C04B35/622
Inventor 罗来慧王宝银杜鹏李伟平姜希杰岳青影
Owner NINGBO UNIV
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