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Method and device for washing ultrafine powder material for ceramic capacitor

A technology of ceramic capacitors and ultrafine powders, applied in chemical instruments and methods, separation methods, filtration circuits, etc., can solve problems such as difficult solid-liquid separation, low separation efficiency, and environmental pollution by ultrafine powders, and achieve manufacturing costs Low cost, simple operation, good universal effect

Pending Publication Date: 2021-01-26
安徽凯盛应用材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the deficiencies in the prior art and provide a method and device for washing ultrafine powder materials for ceramic capacitors; the device and method of the present invention can effectively solve the difficulty of solid-liquid separation in the washing process , The separation efficiency is low, and the separated water contains a large amount of ultrafine powder to pollute the environment

Method used

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  • Method and device for washing ultrafine powder material for ceramic capacitor
  • Method and device for washing ultrafine powder material for ceramic capacitor
  • Method and device for washing ultrafine powder material for ceramic capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 1. Add the superfine barium titanate powder material for ceramic capacitors into the pre-washing storage tank 1, add high-purity water, open valves 10, 11 and 13, and close all other valves, then open the circulating pump 8 and circulate twice, each For 20 minutes each time, fully mix the barium titanate ultrafine powder material with high-purity water to make a washing slurry with a concentration of 15%;

[0051] 2. After the pre-washing storage tank 1 circulates and disperses evenly, open the valve 14, close the valves 15, 16 and valve 13 in turn, and pump the washing slurry into the filter device 4 through the pipeline 17 through the pump 8 to control the internal pressure of the filter device 0.3MPa, the filtered filtrate enters the collection storage tank 3 through the pipeline 18;

[0052] 3. Continuously feed the washing slurry into the filter device 4 until the washing slurry completely enters the filter device 4, stop feeding, and close the delivery pump 8 and ...

Embodiment 2

[0059] According to steps 1-8 in Example 1, the barium titanate ultrafine powder material for ceramic capacitors is dispersed in the pre-washing storage tank 1 in batches for 3 times, and the barium titanate ultrafine powder for each batch of ceramic capacitors is controlled. The error range of bulk slurry concentration is within ±5%, and the material content of barium titanate ultrafine nanopowder for ceramic capacitors after washing is 99.89%.

Embodiment 3

[0061] 1. Add the titanium dioxide ultrafine powder material for ceramic capacitors into the pre-washing storage tank 1, add high-purity water, open valves 10, 11 and 13, and close all other valves, then open the circulation pump 8, and circulate 3 times, each time 30 Minutes, fully mix the titanium dioxide ultrafine powder material with high-purity water to make a washing slurry with a concentration of 25%;

[0062] 2. After the storage tank 1 circulates and disperses evenly, open the valve 14, close the valves 15, 16 and valve 13 in turn, pump the slurry 2 to be washed into the filter device 4 through the pipeline 17 through the pump 8, and control the internal pressure of the filter device to 0.3 MPa, filtered water enters the collection storage tank 3 through the pipeline 18;

[0063] 3. Continuously feed the washing slurry into the filter device 4 until the washing slurry completely enters the filter device 4, stop feeding, and close the delivery pump 8 and the valve 10; ...

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Abstract

The invention relates to a device and a method for washing an ultrafine powder material for a ceramic capacitor. The method is characterized by comprising the following steps of: (1) adding the ultrafine powder material into a pre-washing storage tank (1), adding high-purity water, and circulating the material in the tank body to prepare 10 to 50 percent washing slurry; (2) pumping the slurry intoa filtering device (4), controlling the pressure to be 0.1 to 2.0 MPa, and feeding filtrate into a collecting storage tank (3); (3) collecting the storage tank, standing for layering, and pumping thelower-layer ultrafine precipitate into the filtering device (4) again; (4) adding high-purity water into the raw material storage tank (1), and pumping into the filtering device (4) for filter pressing and washing until the total impurity content in filtrate at an outlet of the filtering device is less than 500ppm; and (5) carrying out pressure maintaining concentration on the ultrafine powder material in the filtering device (4), and controlling the water content to be 10 to 30%. The method has the advantages that the equipment investment cost is low, the operation is simple, no dispersing agent or flocculating agent is added, the yield is high, and the method has good universality in the aspect of washing the ultrafine powder material for the ceramic capacitor and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of preparation of dielectric nano-ceramic materials, and relates to a washing method and device for superfine powder materials used in ceramic capacitors. [0002] technical background [0003] Ultrafine powder materials for ceramic capacitors mainly include important parts such as ultrafine functional ceramic powder materials and electrode paste; among them, ultrafine functional ceramic powder materials occupy the main production and manufacturing costs and directly affect the production of ceramic capacitors. Process and application effects. [0004] With the continuous development of ceramic capacitors, especially chip multilayer ceramic capacitors, towards miniaturization and high capacitance rate. The requirements for the development of dielectric ceramic ultrafine powder materials are becoming more and more stringent. At present, the characteristics of dielectric ceramic materials for ceramic capacitors, such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/46C04B35/053C04B35/01C04B35/057C04B35/14C04B35/626B01D36/04
CPCC04B35/4682C04B35/46C04B35/053C04B35/016C04B35/057C04B35/01C04B35/14C04B35/62605B01D36/04
Inventor 严回葛信信周玉晓舒灵秀赵洪义王友乐王晶
Owner 安徽凯盛应用材料有限公司
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