A kind of ceramic material and its preparation method and application

A technology of ceramic materials and ceramic capacitors, applied in the field of materials, can solve problems such as low breakdown field strength, low energy storage density, and limited applications, and achieve the effects of good stability, high energy storage density, and huge application potential

Active Publication Date: 2022-03-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 Ceramic is an excellent BaTiO 3 The base dielectric material has high dielectric constant, low dielectric loss and high energy storage efficiency, but Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 Ceramics have low breakdown field strength and low energy storage density, which limits their application in practical production

Method used

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  • A kind of ceramic material and its preparation method and application
  • A kind of ceramic material and its preparation method and application
  • A kind of ceramic material and its preparation method and application

Examples

Experimental program
Comparison scheme
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preparation example Construction

[0077] The preparation method of ceramic material of the present invention, comprises the steps:

[0078] (1) According to the chemical formula Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 Weigh the analytically pure BaCO of stoichiometric ratio 3 , CaCO 3 , ZrO 2 and TiO 2 Perform batching, then ball mill for 10h to 12h at a speed of 300r / min to 400r / min for mixing, and calcined at 1100°C to 1200°C for 4h to 6h to obtain Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 Powder, Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 The sieve residue of the powder passing through the 120 mesh sieve is ≤5%. Among them, the ball mill adopts wet ball milling, with absolute ethanol as the medium, zirconia as the grinding ball, and the mass ratio of absolute ethanol, zirconium ball and powder is 2:(1~1.5):1.

[0079] (2) According to the chemical formula Sr 0.7 Bi 0.2 TiO 3 Weigh the analytically pure SrCO of stoichiometric ratio 3 、 Bi 2 o 3 and TiO 2 Dosing, then ball milling at 300r / min-400r / min for 1...

Embodiment 1

[0089] In the present embodiment, shown in the chemical formula of ceramic material: 0.9(Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 )0.1(Sr 0.7 Bi 0.2 TiO 3 ), prepared according to the following steps:

[0090] (1) According to the chemical formula Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 Weigh out the stoichiometric BaCO 3 , CaCO 3 , ZrO 2 and TiO 2 Carry out batching, then ball mill at 300r / min for 10h for mixing, calcined at 1100°C for 4h, and pass through a 120-mesh sieve after crushing to obtain Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 Powder.

[0091] (2) According to the chemical formula Sr 0.7 Bi 0.2 TiO 3 Weigh out the stoichiometric ratio of SrCO 3 、 Bi 2 o 3 and TiO 2 Perform batching, then ball mill for 12 hours at a speed of 350r / min for mixing, calcined at 900°C for 4 hours, and pass through a 120-mesh sieve after crushing to obtain Sr 0.7 Bi 0.2 TiO 3 Powder.

[0092] (3) The powders of steps (1) and (2) are according to chemical formula 0.9 (Ba 0.85 C...

Embodiment 2

[0102] In the present embodiment, shown in the chemical formula of ceramic material: 0.8 (Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 )0.2(Sr 0.7 Bi 0.2 TiO 3 ), prepared according to the following steps:

[0103] (1) According to the chemical formula Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 Weigh out the stoichiometric BaCO 3 , CaCO 3 , ZrO 2 and TiO 2 Carry out batching, then ball mill at 320r / min for 11h for mixing, calcined at 1100°C for 5h, and pass through a 120-mesh sieve after crushing to obtain Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 Powder.

[0104] (2) According to the chemical formula Sr 0.7 Bi 0.2 TiO 3 Weigh out the stoichiometric ratio of SrCO 3 、 Bi 2 o 3 and TiO 2 Perform batching, then ball mill for 11 hours at a rotational speed of 320r / min for mixing, calcined at 960°C for 5 hours, and pass through a 120-mesh sieve after crushing to obtain Sr 0.7 Bi 0.2 TiO 3 Powder.

[0105] (3) The powder of steps (1) and (2) is according to chemical formula 0.8 (...

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Abstract

The invention belongs to the field of materials, and in particular relates to a ceramic material and its preparation method and application. The general formula of ceramic material among the present invention is (1-x) (Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 O 3 )x(Sr 0.7 Bi 0.2 TiO 3 ), where 0.1≤x≤0.4. The present invention adopts Sr 0.7 Bi 0.2 TiO 3 to Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 O 3 With appropriate modification, the obtained ceramic material can achieve high energy storage density and high energy storage efficiency at the same time. The high energy storage efficiency can effectively prevent the stored energy from being released in the form of heat and prolong the service life of the material.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a ceramic material and its preparation method and application. Background technique [0002] With the continuous development of information technology, the miniaturization and multi-functionalization of devices, ceramics with high energy storage density and high energy storage efficiency are the key materials for making small, large-capacity, and high-efficiency capacitors. Because high energy storage density ceramic capacitors have the advantages of high energy storage density, fast charge and discharge speed, anti-cycle aging, high mechanical strength, suitable for extreme environments such as high temperature and high pressure, and stable performance, they meet the requirements of new energy development and utilization, and are widely used It is used in many modern fields such as communication, computer, automobile, electronic circuit equipment and military industry. Howe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/468C04B35/622C04B35/64H01G4/12
CPCC04B35/468C04B35/622C04B35/64H01G4/1227C04B2235/3208C04B2235/3215C04B2235/3232C04B2235/3244C04B2235/3213C04B2235/3298
Inventor 姚武施成魏永起闫非翟继卫
Owner TONGJI UNIV
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