Production method for barite composite conducting material

A composite conductive and barite technology, applied in conductive materials, conductive materials, cable/conductor manufacturing, etc., can solve the problems of affecting the crystal shape integrity, large particle size of composite conductive materials, low roasting temperature, etc., to improve the integrity. , The effect of improving application performance and stabilizing performance

Inactive Publication Date: 2008-05-07
CENT SOUTH UNIV
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Problems solved by technology

[0004] The particle size of the barite matrix used in these two methods is too large (40-44 μm), and the particle size of the composite conductive material formed is large, which affects the use effect in conductive coatings and conductive coatings; the second is that the pH value of the solution chemical reaction is relatively high Low, all less than 2.5, the actual operation will affect the hydrolysis speed, resulting in the product is not easy to adsorb on th

Method used

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  • Production method for barite composite conducting material

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[0017] The original barite 2kg is ball milled in a stirring ball mill, the ball milling medium is zirconia balls, the weight ratio of balls to materials is 4:1, the ratio of water to materials is 1:1, the ball milling time is 1.5 to 7.5 hours, and the obtained particle size is 0.5 to 5.0μm barite powder. After filtering, drying and grinding, it is used for later use. Take 30g of barite powder with a solid content of 30% and place it in 100mL of distilled water, add 0.5% polyethylene glycol as a dispersant, and use SnCl 4 4H 2 O and NH 4 F is raw material, preset SnCl 4 4H 2 O: barite=15:85 (mass ratio), the SnCl of 0.2mol / L 4 4H 2 O ethanol solution with 20% NH 4 The F aqueous solution was mixed, and the F:Sn (substance amount) ratios were 1:99, 3:97, 5:95, 10:90, 30:70 and 50:50, respectively. During constant stirring, the SnCl 4 4H 2 O and NH 4 Add the mixed solution of F dropwise to the distilled water filled with barite, and at the same time add dropwise 40% amm...

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Abstract

The invention discloses a method for preparing barite compound conductive material, which is characterized in that: high-purity barites are ball milled to 0.5 to 5.0 Mum of the particle size through method of powders prepared by wet chemical, the barite powders are put in distilled water after being filtered, dried and grinded, simultaneously, polyethylene glycol is added as dispersing agent; the NH4F solution and the SnCl4 4H2O ethanol solution are mutually dissolved with each other, then, the solution is dropped in the distilled water of the barite powders, the quantity of materials is controlled as F: Sn 1:99 to 50:50, simultaneously, the pH value is controlled as 3 to 5, the reaction temperature is 20 to 60 DEG C, then be roasted after being stirred, air pump filtrated and dried. The invention has the advantages that the metal oxide coats on the barite surface more uniformly, the obtained compound conductive material is low colored, the conductibility is more stable, the dispersity is strong and the application performance is greater.

Description

technical field [0001] The invention relates to the preparation of a composite conductive material with minerals as a matrix, in particular to a preparation method of a barite composite conductive material. Background technique [0002] Composite conductive materials are based on light, cheap, and light-colored materials. Through chemical compounding, a conductive oxide layer is formed on the surface of the substrate or doped with semiconductors to obtain a type of powder material with conductive functionality. This kind of composite conductive material can be divided into conductive mica powder, conductive titanium dioxide, conductive barium sulfate and conductive silicon dioxide according to different substrates. Its appearance is generally off-white or light gray powder, with light color, good conductivity, and stability. High performance, heat resistance, corrosion resistance, low cost and so on. It can also be combined with other pigments to make permanent conductive a...

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Application Information

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IPC IPC(8): H01B13/00H01B1/00C04B35/622C04B35/01
Inventor 杨华明
Owner CENT SOUTH UNIV
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