Ceramic pulse capacitor and dielectric material, and preparation methods thereof

A technology of pulse capacitors and dielectric materials, applied in the direction of fixed capacitor dielectrics, capacitors, fixed capacitors, etc., can solve the problems of poor capacitance temperature stability and high dielectric constant, achieve low dielectric loss, large dielectric constant, and improve insulation performance Effect

Active Publication Date: 2021-08-13
FUJIAN TORCH ELECTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

SrTiO 3 The dielectric constant of the material itself is high, but the capacitance temperature stability is poor, which needs to be adjusted by doping with additives

Method used

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  • Ceramic pulse capacitor and dielectric material, and preparation methods thereof
  • Ceramic pulse capacitor and dielectric material, and preparation methods thereof

Examples

Experimental program
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preparation example Construction

[0029] Its preparation method comprises the following steps:

[0030] Step 1, preparation of SrTiO by molten salt method 3 : According to the molar ratio 1:1: (2-4): (2-4) Weigh SrCO respectively 3 , TiO 2 , NaCl, KCl, add appropriate amount of ethanol and zirconium beads, mix and ball mill for 4-8h, after drying, move the powder into an alumina crucible for calcination at 900°C for 1h, then cool to room temperature naturally; wash and filter until Cl-free - was detected; finally at 120°C, dry to get SrTiO 3 ;

[0031] Step 2, preparation of CaTiO by molten salt method 3 : According to the molar ratio of 1:1: (2-4): (2-4) respectively weigh CaCO 3 , TiO 2 , NaCl, KCl, add an appropriate amount of ethanol and zirconium beads, mix and ball mill for 4-8 hours, after drying, move the powder into an alumina crucible for calcination at 800°C for 1 hour, and cool naturally to room temperature. The calcined product is ultrasonically washed and filtered with deionized water unt...

Embodiment 1

[0038] A ceramic pulse capacitor, made of a dielectric material, specifically, the dielectric material includes the following molar parts of raw materials: 60 parts of SrTiO 3 , 40 parts CaTiO 3 , 0.3 parts of MnCO 3 , 1 part of Sr 0.99 Ca 0.01 sn 0.98 Ti 0.02 o 3 , 3 servings of La 0.02 Bi 1.98 Ti 2 o 7 .

[0039] Among them, SrTiO 3 , CaTiO 3 Synthesized by molten salt method; Sr 0.99 Ca 0.01 sn 0.98 Ti 0.02 o 3 Synthesized by solid-phase method; La 0.02 Bi 1.98 Ti 2 o 7 Synthesized by solid phase method.

[0040] Its preparation method comprises the following steps:

[0041] Step 1, preparation of SrTiO by molten salt method 3 : SrCO was weighed at a molar ratio of 1:1:3:3 3 、TiO 2 , NaCl, KCl, add appropriate amount of ethanol and zirconium beads, mix and ball mill for 6 hours, after drying, move the powder into an alumina crucible for calcination at 900°C for 1 hour, and cool to room temperature naturally; , filtered until no Cl - was detected; ...

Embodiment 2

[0048] A ceramic pulse capacitor, made of a dielectric material, specifically, the dielectric material includes the following molar parts of raw materials: 50 parts of SrTiO 3 , 50 parts CaTiO 3 , 0.5 phr MnCO 3 , 2 parts of Sr 0.99 Ca 0.01 sn 0.98 Ti 0.02 o 3 , 2 parts of La 0.02 Bi 1.98 Ti 2 o 7 .

[0049] Among them, SrTiO 3 , CaTiO 3 Synthesized by molten salt method; Sr 0.99 Ca 0.01 sn 0.98 Ti 0.02 o 3 Synthesized by solid-phase method; La 0.02 Bi 1.98 Ti 2 o 7 Synthesized by solid phase method.

[0050] Its preparation method comprises the following steps:

[0051] Step 1, preparation of SrTiO by molten salt method 3 : SrCO was weighed at a molar ratio of 1:1:3:3 3 、TiO 2 , NaCl, KCl, add appropriate amount of ethanol and zirconium beads and mix ball mill for 6h, after drying, move the powder into an alumina crucible for calcination at 900°C for 1h, then cool to room temperature naturally; the calcined product is ultrasonically washed with deioni...

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Abstract

The invention relates to a ceramic pulse capacitor and a dielectric material, and preparation methods thereof. The dielectric material for the ceramic pulse capacitor comprises, by mole, 40-60 parts of SrTiO3, 60-40 parts of CaTiO3, 0.1-0.5 part of MnCO3, 1-2 parts of Sr1-xCaxSn1-yTiyO3 and 2-3 parts of LazBi2-zTi2O7, wherein x is greater than 0 and less than 0.05, y is greater than 0 and less than 0.05, and z is greater than 0 and less than 0.05. The dielectric material prepared by the invention is high in density, large in dielectric constant and low in dielectric loss, and is suitable for ceramic pulse capacitors.

Description

technical field [0001] The invention belongs to the field of preparation of ceramic capacitors, and in particular relates to a ceramic pulse capacitor, a dielectric material and a preparation method thereof. Background technique [0002] With the development of science and technology, the development trend of modern electronic equipment is miniaturization, integration and multi-layer. Multilayer ceramic capacitors have the characteristics of small size, excellent performance and high stability, and can conform to the development trend of electronic equipment. Among them, ceramic pulse capacitors are widely used as energy storage components in pulse power systems. Ceramic pulse capacitors need to be charged by a low-power power source in a relatively long period of time, and then release the stored energy in a short period of time to obtain high-power output. Ceramic pulse capacitors have high stability and reliability, high temperature resistance, high energy power and ext...

Claims

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Application Information

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IPC IPC(8): C04B35/465C04B35/622C04B35/64H01G4/12
CPCC04B35/465C04B35/622C04B35/64H01G4/1227C04B2235/3262C04B2235/6567
Inventor 熊月龙
Owner FUJIAN TORCH ELECTRON TECH CO LTD
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