Preparing process of great size energy-storing dielectric ceramic

A medium ceramic, large-scale technology, applied in the field of ceramic materials, can solve problems such as rarely seen reports, difficult preparation of functional ceramics, limited promotion of functional ceramics, etc., to achieve simple and reliable process, good market application prospects and commercial value, deformation small effect

Active Publication Date: 2007-06-27
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are great difficulties in the preparation of large-size and high-quality functional ceramics that meet their specific shape requirements, which greatly limits the further promotion of functional ceramics in the application of pulse power technology
At present, there are few reports on the preparation methods of this kind of large-scale functional ceramics with high energy storage density.

Method used

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  • Preparing process of great size energy-storing dielectric ceramic
  • Preparing process of great size energy-storing dielectric ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 18% Al 2 o 3 Add 30t%H 3 BO 3 Add 52% SiO 2 Stir and mix the powder, keep warm at 1500°C for 2 hours, ball mill after water quenching to obtain glass powder, and then use 99.5% TiO 2 Add the ratio of 0.5% borosilicate glass powder to prepare the solid material for the water-based slurry, the solid material and deionized water mass ratio is 1: 1, the triammonium citrate content is 1% of the solid material quality, polyvinyl alcohol ( The content of PVA) is 0.5% of solid material quality, n-butanol is about 0.5% of solid material quality, and the mass ratio of solid material and ball milling medium is 1: 2. Carry out wet ball milling for 4 hours according to the above ratio; perform centrifugal spray granulation on the water-based slurry prepared by ball milling, the inlet air temperature is 165±5°C, the outlet air temperature is 115±5°C, and the flow rate is 3 kg / hour; It is formed by cold isostatic pressing, the forming pressure is 150 MPa, and the pressure is main...

Embodiment 2

[0041] 25% Al 2 o 3 Add 30%H 3 BO 3 Add 45% SiO 2 The powder is stirred and mixed, and kept at 1500°C for 2 hours. After water quenching, ball milling is obtained to obtain borosilicate glass powder, and then according to 98% TiO 2 Add 2% borosilicate glass powder to prepare solid material for water-based slurry, the mass ratio of solid material and deionized water is 1:2, the content of triammonium citrate is about 0.5% of the mass of solid material, and the content of PVA 0.5% of the mass of the solid material, n-octanol is 0.5% of the mass of the solid material, and the mass ratio of the solid material to the ball milling medium is 1:4. Carry out wet ball milling for 4 hours according to the above ratio; perform centrifugal spray granulation on the water-based slurry prepared by ball milling, the inlet air temperature is 165±5°C, the outlet air temperature is 115±5°C, and the flow rate is 3 kg / hour; It is formed by cold isostatic pressing, the forming pressure is 150 M...

Embodiment 3

[0043] 15% CaO plus 20% H 3 BO 3 Add 45% SiO 2加 20% Bi 2 o 3 Stir and mix the powder, keep it warm at 1450°C for 2 hours, ball mill after water quenching to obtain borosilicate glass powder, and then follow the 8.2% SrZrO 3 Add 87.8% SrTiO 3 Add the ratio of 4% borosilicate glass powder to prepare the solid material for water-based slurry, the mass ratio of solid material and deionized water is 1:0.8, the content of triammonium citrate is 0.7% of the solid material quality, and the content of PVA 0.8% of the mass of the solid material, n-butanol is about 0.4% of the mass of the solid material, and the mass ratio of the solid material to the ball milling medium is 1:1. Carry out wet ball milling according to the above ratio for 6 hours; perform centrifugal spray granulation on the water-based slurry prepared by the ball mill, the inlet air temperature is 165±5°C, the outlet air temperature is 110±5°C, and the flow rate is 5 kg / hour. It is formed by cold isostatic pressing...

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Abstract

The great size energy-storing dielectric ceramic is prepared with ceramic material and borosilicate glass powder, through the steps of: dry stirring to compound mixed powder material for preparing borosilicate glass powder; high temperature smelting the mixed powder material and water quenching to prepare borosilicate glass powder; wet ball milling to obtain water-base slurry comprising ceramic material CaTiO3, BaTiO3, SrTiO3, SrZrO3, PZT, PbTiO3 and / or TiO2 and borosilicate glass powder accounting for 0.5-10 wt% of the solid material; spray pelletizing to prepare spherical grains; cold isostatic pressure forming great size ceramic biscuit; machining and singtering at 1150-1400 deg.c to obtain great size energy-storing dielectric ceramic. The great size energy-storing dielectric ceramic has high density, dielectric constant of 80-2000, voltage withstand higher than 30 kV / cm, and may be used as the energy-storing of pulse forming line and other high voltage system.

Description

technical field [0001] The invention relates to a preparation method of large-scale functional ceramics, in particular to a preparation method of large-scale energy storage medium ceramics used in solid-state high-voltage pulse forming line technology, and belongs to the field of ceramic materials. Background technique [0002] In the research of high-voltage pulse power technology, pulse forming technology is a very important research topic. During the development of this technology for more than 40 years, the energy storage medium of high-voltage short pulse forming line has experienced from insulating transformer oil to deionized water. development process. This development enables the linear induction high-current accelerator to achieve the goal of low-resistance and high-current, meets the application requirements, and promotes the advancement of technology in related fields and the development of applications. At present, the pulse power part of the linear induction h...

Claims

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Application Information

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IPC IPC(8): C04B38/00C04B35/16C04B35/622
Inventor 刘韩星吴朝晖曹明贺
Owner WUHAN UNIV OF TECH
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