A kind of energy storage microwave dielectric ceramic material and preparation method thereof

A technology of microwave dielectric ceramics and ceramic materials, applied to ceramics, inorganic insulators, etc., can solve the problems of complex process and low frequency of use, and achieve the effect of simple preparation process and low sintering temperature

Active Publication Date: 2019-02-22
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the existing energy storage medium ceramics, which are complex in process and low in frequency of use, the present invention provides an energy storage microwave dielectric ceramic material and its preparation method

Method used

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  • A kind of energy storage microwave dielectric ceramic material and preparation method thereof
  • A kind of energy storage microwave dielectric ceramic material and preparation method thereof
  • A kind of energy storage microwave dielectric ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1)(1-x)CaTiO 3 -xNdAlO 3 Preparation of pre-fired powder

[0024] According to the chemical formula (1-x)CaTiO 3 -xNdAlO 3 Carry out batching, wherein x=0.3, x is mole fraction, weighs CaCO 3 、TiO 2 、Nd 2 o 3 、Al 2 o 3 Electronic grade powder; the weighed powder is ball milled in deionized water for 24 hours, the ball milling medium is zirconia balls, the ball / material mass ratio is 1.5:1, the filling capacity is 1 / 2 of the tank volume, and the ball milling speed is 100 rpm / min; the mixed slurry after ball milling was dried and placed in an alumina crucible at 1300°C for 3 hours to synthesize (1-x)CaTiO 3 -xNdAlO 3 Powder;

[0025] (2) mMgO-nAl 2 o 3 -kSiO 2 Preparation of glass powder

[0026] According to the chemical formula mMgO -nAl 2 o 3 -kSiO 2 Perform batching, where m=15, n=25, k=60, m, n, k are mass percentages, weigh MgO, Al 2 o 3 and SiO 2Mix the electronic grade powder evenly, put the mixed powder in a crucible, keep it warm at 1500°C...

Embodiment 2

[0031] (1)(1-x)CaTiO 3 -xNdAlO 3 Preparation of pre-fired powder

[0032] According to the chemical formula (1-x)CaTiO 3 -xNdAlO 3 Carry out batching, wherein x=0.3, x is mole fraction, weighs CaCO 3 、TiO 2 、Nd 2 o 3 、Al 2 o 3 Electronic grade powder; the weighed powder is ball milled in deionized water for 8 hours, wherein the ball milling medium is corundum balls, the ball / material mass ratio is 2:1, the filling capacity is 3 / 5 of the tank volume, and the ball milling speed is 250 rpm minutes; the mixed slurry after ball milling was dried and placed in an alumina crucible at 1250°C for 3 hours to synthesize (1-x)CaTiO 3 -xNdAlO 3 Powder;

[0033] (2) mMgO-nAl 2 o 3 -kSiO 2 Preparation of glass powder

[0034] According to the chemical formula mMgO -nAl 2 o 3 -kSiO 2 Perform batching, where m=20, n=20, k=60, m, n, k are mass percentages, weigh MgO, Al 2 o 3 and SiO 2 Mix the electronic grade powder evenly, put the mixed powder in a crucible, keep it warm ...

Embodiment 3

[0039] (1)(1-x)CaTiO 3 -xNdAlO 3 Preparation of pre-fired powder

[0040] According to the chemical formula (1-x)CaTiO 3 -xNdAlO 3 Carry out batching, wherein x=0.3, x is mole fraction, weighs CaCO 3 、TiO 2 、Nd 2 o 3 、Al 2 o 3 Electronic grade powder; the weighed powder is ball milled in alcohol for 16 hours, wherein the ball milling medium is agate balls, the ball / material mass ratio is 2.1:1, the filling capacity is 4 / 5 of the tank volume, and the ball milling speed is 200 rpm ; The mixed slurry after ball milling was dried and placed in an alumina crucible to synthesize (1-x)CaTiO with a temperature of 1300°C for 3 hours 3 -xNdAlO 3 Powder;

[0041] (2) mMgO-nAl 2 o 3 -kSiO 2 Preparation of glass powder

[0042] According to the chemical formula mMgO -nAl 2 o 3 -kSiO 2 Carry out batching, wherein m=18, n=28, k=54, m, n, k are mass percentage, weigh MgO, Al 2 o 3 and SiO 2 Mix the electronic grade powder evenly, put the mixed powder in a crucible, keep i...

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Abstract

The invention discloses an energy storage microwave dielectric ceramic material and a preparation method thereof. CaTiO3-NdAlO3 powder is prepared through pre-sintering, then a different amount of MgO-Al2O3-SiO2 glass powder is added, and finally the energy storage microwave dielectric ceramic material is prepared. The ceramic material has a perovskite crystalline phase structure and good compactness (relative density is larger than 99%). Microwave dielectric properties and energy storage performance are excellent and include the dielectric constant epsilon being 30-100, the breakdown electric field intensity Eb being 180-531 kV / cm and energy storage density E being 0.08-0.5 J / cm<3>. According to the microwave dielectric properties (in the range of 2-15 GHz), the dielectric constant epsilon is 30-100, Qf is 15000-20000 GHz, and the temperature coefficient is adjustable. The material is simple in preparation process and low in sintering temperature and has high industrial application value.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of electronic ceramics, and in particular relates to an energy storage microwave dielectric ceramic material and a preparation method thereof. Background technique [0002] With the continuous consumption of energy, non-renewable problems such as oil and natural gas, people's increasing demand for energy, and the disadvantages of energy transmission, it is imminent to develop new energy and energy storage. As a capacitor, dielectric ceramics have attracted extensive attention due to their advantages such as lightness, environmental protection, and high efficiency. Currently, there are three main types of materials being developed as energy storage media: batteries, supercapacitors, and energy storage media capacitors. Among them, as the device with the highest energy storage density, the battery meets the requirements of miniaturization, but because it uses the redox reaction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C12/00H01B3/12C04B35/468C04B35/622
CPCC04B35/44C04B35/465C04B35/50C04B35/626C04B35/62615C04B2235/3206C04B2235/3418C04B2235/442C04B2235/94C04B2235/95C04B2235/96
Inventor 郑兴华刘洋肖腾
Owner FUZHOU UNIV
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