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Doped and modified barium zirconate-based ceramic capacitor material

A technology of ceramic capacitors and barium zirconate, applied in the direction of fixed capacitor dielectrics and components of fixed capacitors, can solve the problems of low withstand voltage and small dielectric constant of capacitors, and achieve the effect of improving temperature characteristics

Inactive Publication Date: 2013-08-07
WUJIANG HUACHENG COMPOSITE MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The current high-voltage capacitors are used in high-voltage places, but most capacitors have small dielectric constants and low withstand voltage values.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0006] When proportioning, we first add barium carbonate BaCO 3 and zirconium dioxide ZrO 2 , calcium carbonate CaCO 3 and zirconium dioxide ZrO 2 According to a certain ratio, it is mixed by ball milling, dried, and then synthesized at 1000 to 1200 degrees Celsius to obtain barium zirconate BaZrO 3 , calcium zirconate CaZrO 3 ; In obtaining barium zirconate BaZrO 3 , calcium zirconate CaZrO 3 Finally, the rest of the above materials are stirred and ball milled according to the ratio, diluted with a small amount of acetone, stirred at a high speed (7000r / min) for 20min, to fully disperse the inorganic materials, added 8% polyvinyl alcohol for spray granulation, and then placed at 130°C After 1 hour in the oven, the capacitor of this formula can be obtained. The dielectric constant is 9200, the withstand voltage is increased to 18KV / mm, the temperature characteristics of the capacitor are improved, the dielectric loss is less than 0.0001, and the high temperature stability...

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Abstract

The invention provides a doped and modified barium zirconate-based ceramic capacitor material, which consists of 80 to 84 percent of barium zirconate BaZrO3, 8 to 12 percent of dysprosium oxide Dy2O3, 6 to 10 percent of yttrium oxide Y2O3 and 6 to 10 percent of calcium zirconate CaZrO3. The sum of each component is 100%. The barium zirconate BaZrO3, dysprosium oxide Dy2O3, yttrium oxide Y2O3 and calcium zirconate CaZrO3 are mixed according to the formula ratio and then vinyl alcohol is added for pressing and molding. The ceramic capacitor material is obtained by firing the materials under a temperature range between 1250 DEG C to 1400 DEG C. the In the capacitor material adopting the formula, a dielectric constant is 9,200, a withstand voltage is improved to 18KV / mm, the capacitance temperature characteristic is improved, the dielectric loss is less than 0.0001, and the change rate of high-temperature stability capacity with the temperature is less than 10 percent.

Description

technical field [0001] The invention relates to a capacitor material, especially a high-voltage ceramic capacitor material. Background technique [0002] The current high-voltage capacitors are used in high-voltage places, but most capacitors have small dielectric constants and low withstand voltage values. Contents of the invention [0003] The object of the present invention is to provide a high-voltage ceramic capacitor material with large dielectric constant and high withstand voltage. [0004] A doped modified barium zirconate based ceramic capacitor material is characterized in that it is made of barium zirconate BaZrO 3 80~84%, dysprosium oxide Dy 2 o 3 8-12%, yttrium oxide Y 2 o 3 6-10%, calcium zirconate CaZrO 3 6-10% composition, the sum of the contents of each component is 100%, the barium zirconate BaZrO 3 , dysprosium oxide Dy 2 o 3 , Yttrium oxide Y 2 o 3 , calcium zirconate CaZrO 3 After mixing according to the formula ratio, polyvinyl alcohol is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/622H01G4/12
Inventor 钱云春
Owner WUJIANG HUACHENG COMPOSITE MATERIAL SCI & TECH