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Strontium titanate base energy storage medium ceramics and preparing method

A technology of energy storage medium and ceramics, which is applied in the field of SrTiO3-based energy storage medium ceramics doped with SrZrO3 solid solution and its preparation, can solve the problems that have not yet been seen, and achieves overcoming large low-frequency loss, low loss, and high dielectric. constant effect

Active Publication Date: 2005-03-02
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, no SrZrO 3 and MnO 2 Doping improves SrTiO 3 Report on Dielectric and Dielectric Properties of Ceramics

Method used

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  • Strontium titanate base energy storage medium ceramics and preparing method
  • Strontium titanate base energy storage medium ceramics and preparing method
  • Strontium titanate base energy storage medium ceramics and preparing method

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Embodiment Construction

[0017] The embodiment of the present invention adopts solid state reaction method to prepare Sr(Zr x Ti 1-x )O 3 Dielectric ceramic.

[0018] The specific implementation is as follows: SrCO with a purity greater than 99% 3 , ZrO 2 and TiO 2 As the starting material, according to SrTiO 3 , SrZrO 3 Chemical ratio ingredients, ground in deionized water for 12 hours and then dried, and pre-synthesized SrTiO at 1150°C for 4 hours 3 Powder, synthesize SrZrO at 1250°C for 6 hours 3 Powder, then press Sr(Zr x Ti 1-x )O 3 Stoichiometric batching, where x=0.01-0.10, and adding MnO with a purity greater than 85% 2 , wet milled in deionized water for 24 h. The dried material is granulated by adding polyvinyl alcohol aqueous solution with a concentration of 0.5-2.0wt%, the amount of which is 5-10wt% of the total amount of powder, and then compressed with a pressure of 80-200Mpa, and sintered at 1350-1450°C 2-6 hours. Dielectric ceramics are produced. The preparation method c...

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Abstract

The energy storing strontium titanate base dielectric ceramic has the chemical expression of Sr(ZrxTi1-x)O3, where x is 0.01-0.10, and has doped MnO2 with purity higher than 85 %. The preparation process includes the following steps: compounding material with SrCO3, ZrO2 and TiO2 in 99 % over purity as initial material in the chemical ratio of SrTiO3 and SrZrO3, grinding in deionized water and stoving, maintaining at 1150 deg.c for 4 hr to synthesize SrTiO3 powder, maintaining at 1250 deg.c for 6 hr to synthesize SrZrO3 powder, compounding material based on Sr(ZrxTi1-x)O3, where x is 0.01-0.10, adding MnO2 powder with purity higher than 85 %, grinding in deionized water and mixing, stoving in air atmosphere, adding PVA aqua to pelletize, pressing to form, and sintering in air atmosphere inside high temperature furnace to produce the dielectric ceramic. The dielectric ceramic has high dielectric constant, low loss and high dielectric strength.

Description

technical field [0001] The invention relates to a strontium titanate-based energy storage medium ceramic and a preparation method, specifically a SrZrO 3 Solid solution doped SrTiO 3 Base energy storage medium ceramic and preparation method Background technique [0002] Pulse forming technology is an important topic in the research of high-voltage pulse power. Pulse forming line is one of the key factors of accelerator performance. Commonly used pulse compression forming structures include coaxial structure and flat plate structure. In order to adapt to the development of solid-state pulse forming lines, the energy storage medium is developing in the direction of low resistance, high flow and miniaturization. Energy storage dielectric ceramics used in solid-state pulse forming lines should meet the following requirements for dielectric and withstand voltage characteristics: (1) High relative permittivity ε r ; (2) Low dielectric loss tgη, generally required at operating f...

Claims

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Application Information

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IPC IPC(8): C04B35/462C04B35/48C04B35/622
Inventor 刘韩星吴朝晖余洪滔曹明贺
Owner WUHAN UNIV OF TECH
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