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A kind of preparation method of ceramic capacitor material

A technology of ceramic capacitors and mixed solution, applied in the field of functional materials, can solve the problems of long time of ball milling and high temperature sintering, and achieve the effect of short sintering time and low sintering temperature

Active Publication Date: 2020-02-14
陕西欧西克电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Application No. 201710242298.0 "High Dielectric Constant Ceramic Capacitor Material and Its Preparation Method", discloses a high-temperature sintering method to obtain BaZr 0.1 Ti 0.9 o 3 , then mix it with the rest of the material and then sinter it at high temperature to obtain a high dielectric constant ceramic capacitor material. This method requires two ball milling, which requires extremely high material size, and the time for ball milling and high temperature sintering is long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1: According to the molar ratio of Ba:Ca:Zr:Eu:K=9:1:1:0.1:0.2, 187.41g BaCl 2 , 11.1gCaCl 2 , 32.23g ZrOCl 2 ·8H 2 O, 2.58g EuCl 3 , 1.49g KCl is dissolved in water and is made into mixed solution A, leaves standstill after stirring;

[0028] Step 2: Weigh 170.74g TiCl 4 , added to the mixed solution A, and then added 143.99g NaOH to obtain the mixed solution B, and slowly stirred the mixed solution B until it was viscous to obtain the hydrothermal reaction precursor;

[0029] Step 3: Move the hydrothermal reaction precursor obtained in step 2) into the lining of the hydrothermal reaction kettle for hydrothermal reaction. The reaction temperature is 170°C, and the reaction is for 12 hours. After the reaction is completed, it is lowered to room temperature. Washing treatment, then drying at 60°C;

[0030] Step 4: After drying, the product is ground into a fine powder and passed through a 200-mesh sieve. After the sieve, the fine powder is added with polyvinyl...

Embodiment 2

[0033] Step 1: 235.21g Ba(NO 3 ) 2 , 11.1g CaCl 2 , 32.23g ZrOCl 2 ·8H 2 O, 9.81g Eu(NO 3 ) 3 ·6H 2 O, 0.60g KCl is dissolved in water and is made into mixed solution A, leaves standstill after stirring;

[0034] Step 2: Weigh 170.74g TiCl 4 , added to the mixed solution A, and then added 251.97g NaOH to obtain the mixed solution B, and slowly stirred the mixed solution B until it was viscous to obtain the hydrothermal reaction precursor;

[0035] Step 3: Move the hydrothermal reaction precursor obtained in step 2) into the lining of the hydrothermal reaction kettle for hydrothermal reaction. The reaction temperature is 250 ° C, and the reaction is 8 hours. After the reaction is completed, it is lowered to room temperature. Washing treatment, then drying at 80°C;

[0036] Step 4: After drying, the product is ground into a fine powder and passed through a 400-mesh sieve. After the sieve, the fine powder is added with polyvinyl alcohol. The amount of polyvinyl alcohol a...

Embodiment 3

[0039] Step 1: 235.21g Ba(NO 3 ) 2 , 16.41g Ca(NO 3 ) 2 , 32.23g ZrOCl 2 ·8H 2 O, 5.17g EuCl 3 , 1.01g KNO 3 Dissolve in water to make mixed solution A, stir and let stand;

[0040] Step 2: Weigh 170.74g TiCl 4 , added to the mixed solution A, and then added 215.98g NaOH to obtain the mixed solution B, slowly stirred the mixed solution B until it was viscous, and obtained the hydrothermal reaction precursor;

[0041] Step 3: Move the hydrothermal reaction precursor obtained in step 2) into the lining of the hydrothermal reaction kettle for hydrothermal reaction. The reaction temperature is 200°C, and the reaction is for 10 hours. After the reaction is completed, it is lowered to room temperature. Washing treatment, then drying at 70°C;

[0042] Step 4: After drying, the product is ground into a fine powder and passed through a 350-mesh sieve. After the sieve, the fine powder is added with polyvinyl alcohol. The amount of polyvinyl alcohol added is 1.0% of the mass of ...

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Abstract

The invention discloses a method for preparing a ceramic capacitor material. The method comprises the steps that on the basis of BCTZ-system ceramic, the two elements of Eu and K are used for doping according to a limited doping ratio, firstly, a hydrothermal synthesis reaction is conducted, then, high-temperature sintering is conducted, and finally the ceramic capacitor material is obtained. According to the preparation method, the situation is avoided that ball-grinding operation is conducted on raw materials for a long time, and the final material can be obtained simply by conducting sintering once; the sintering temperature is low, the sintering time is short, the dielectric constant epsilon of the obtained material is between 14680 and 18600, and the dielectric loss is between 0.004 and 0.014.

Description

technical field [0001] The invention belongs to the field of functional materials, and in particular relates to a preparation method of a low-temperature sintered ceramic capacitor material with a high dielectric constant. Background technique [0002] With the rapid development of microelectronics information technology, the demand for miniaturization, portability, multi-function, digitalization, high reliability and high performance of electronic complete machines, as well as the requirements for miniaturization, integration and modularization of components The demands are becoming more and more urgent. At this time, it is necessary to develop new dielectric materials with more advantages. The size of electronic components is negatively correlated with the dielectric constant of the medium. To achieve the above functions, it is necessary to develop materials with higher dielectric constant, but high dielectric constant will lead to greater dielectric loss, and the pursui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/468C04B35/622C04B35/63
CPCC04B35/468C04B35/622C04B35/6303C04B2235/3201C04B2235/3208C04B2235/3215C04B2235/3224C04B2235/3232C04B2235/602C04B2235/606C04B2235/656C04B2235/6567
Inventor 胡登卫张新利
Owner 陕西欧西克电子有限公司
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