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High energy density ceramic material and preparation method

A technology of high energy storage density and ceramic materials, applied in the field of electronic ceramics, can solve the problems of limited improvement and high cost of energy storage ceramic materials, and achieve the effects of simple equipment, increased energy storage density, and high breakdown strength

Inactive Publication Date: 2016-03-30
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Ba 0.4 Sr 0.6 TiO 3 The energy storage density of energy storage ceramic materials is only 0.3J / cm 3 , the energy storage density can be improved by ion or compound doping, or advanced preparation processes such as spark plasma sintering, but the cost of preparing energy storage ceramic materials by these methods is high, and the degree of improvement is limited

Method used

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  • High energy density ceramic material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of preparation method of high energy storage density ceramic material, according to chemical formula Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 (BCTZ), mix barium carbonate, calcium carbonate, titanium dioxide and zirconia evenly and then keep warm at 1270°C for 2 hours to synthesize BCTZ ceramic powder, according to the chemical formula Na 0.5 Bi 0.5 TiO 3 (NBT), sodium carbonate, bismuth oxide and titanium dioxide were mixed uniformly and then kept at 840°C for 4h to synthesize NBT ceramic powder. Mix BCTZ and NBT ceramic powders according to the chemical formula 0.45NBT-0.55BCTZ, use deionized water as the ball milling medium and ball mill for 6 hours to mix evenly, then dry at 80°C, after granulation and molding, keep warm at 1170°C for 2 hours and sinter Porcelain, high energy storage density ceramic material.

Embodiment 2

[0026] A kind of preparation method of high energy storage density ceramic material, according to chemical formula Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 (BCTZ), mix barium carbonate, calcium carbonate, titanium dioxide and zirconia evenly and then keep warm at 1270°C for 2 hours to synthesize BCTZ ceramic powder, according to the chemical formula Na 0.5 Bi 0.5 TiO 3 (NBT), sodium carbonate, bismuth oxide and titanium dioxide were mixed uniformly and then kept at 840°C for 4h to synthesize NBT ceramic powder. Mix BCTZ and NBT ceramic powders according to the chemical formula 0.5NBT-0.5BCTZ, use deionized water as the ball milling medium and ball mill for 6 hours to mix evenly, then dry at 80°C, after granulation and molding, keep warm at 1180°C for 2 hours and sinter Porcelain, high energy storage density ceramic material.

[0027] see figure 2 , is the hysteresis loop diagram of the ceramic sample prepared in Example 1, as can be seen from the figure that the energy stora...

Embodiment 3

[0029] A kind of preparation method of high energy storage density ceramic material, according to chemical formula Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 (BCTZ), mix barium carbonate, calcium carbonate, titanium dioxide and zirconia evenly and then keep warm at 1270°C for 2 hours to synthesize BCTZ ceramic powder, according to the chemical formula Na 0.5 Bi 0.5 TiO 3 (NBT), sodium carbonate, bismuth oxide and titanium dioxide were mixed uniformly and then kept at 840°C for 4h to synthesize NBT ceramic powder. Mix BCTZ and NBT ceramic powders according to the chemical formula 0.55NBT-0.45BCTZ, use deionized water as the ball milling medium and ball mill for 7 hours to mix evenly, then dry at 70°C, after granulation and molding, keep warm at 1150°C for 4 hours and sinter Porcelain, high energy storage density ceramic material.

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Abstract

Provided is a high energy density ceramic material and a preparation method. BCTZ ceramic powder and NBT ceramic powder are blended according to a chemical formula (1-x)NBT-xBCTZ; after being mixed uniformly and undergoing granulation and forming, the BCTZ ceramic powder and the NBT ceramic powder undergo heat preservation for 2-4 hours at 1150-1200 DEG C to be sintered to obtain porcelain, so as to obtain the high energy density ceramic material, wherein the value range of x is 0.45-0.55. According to the high energy density ceramic material, the (1-x)NBT-xBCTZ prepared by utilizing a conventional solid state method is adopted, the energy density of a relaxor ferroelectric ceramic material reaches 0.66 J / cm3 and is much higher than the energy density of the ceramic material of Ba0.4Sr0.6TiO3. The method for preparing the high energy density ceramic material is simple in device, simple to operate, low in cost and capable of being produced on a large scale and provides the foundation for the preparation of the high energy density ceramic material on a large scale at low cost.

Description

technical field [0001] The invention belongs to the field of electronic ceramics, and relates to a high energy storage density ceramic material and a preparation method. Background technique [0002] With the rapid development of electronic information technology, people have higher and higher requirements for the use of equipment. In order to achieve higher performance, miniaturization, miniaturization and integration are the development trends of electronic components. As an important energy storage device, capacitor is one of the electronic components widely used in electronic equipment. Ceramic capacitors are widely used due to their advantages such as wide operating temperature range, long life, and reliable performance. Among them, ferroelectric ceramic materials have the advantages of large dielectric constant and strong nonlinear effect. The energy storage density J of ferroelectric ceramic materials per unit volume can be calculated by the following formula: [00...

Claims

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Application Information

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IPC IPC(8): C04B35/49C04B35/626
Inventor 蒲永平姚谋腾
Owner SHAANXI UNIV OF SCI & TECH
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