Production method for barite composite conducting material

Abstract

The invention discloses a preparation method of a barite composite conductive material. The high-purity barite powder is wet ball-milled to a particle size of 0.5-5.0 μm, filtered, dried and ground, and the barite powder is placed in distilled water , while adding polyethylene glycol as a dispersant; the NH4F aqueous solution and the ethanol solution of SnCl4 4H2O are miscible, dripped into the distilled water of the barite powder, and the F: Sn is controlled according to the amount of the substance to be 1:99~50:50, At the same time, the pH value is controlled to be 3-5, the reaction temperature is 20°C-60°C; stirring, suction filtration, drying, and roasting at 600°C-900°C. In the method, the coating of the metal oxide on the surface of the barite is more uniform, and the prepared composite conductive material has light color, more stable conductivity, strong dispersion and better application performance.

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...

AI Technical Summary

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 the barite surface, it is difficult to achieve uniform coating effect; the third is that the degree of dispersion in the hydrolysis reaction is not enough, which will also affect the reaction process and product performance

In addition, in the existing FSB preparation method, due to the low firing temperature (less than 500°C), it affects the formation of SnO in the cladding layer. 2 The integrity of the crystal form, resulting in low stability of powder performance

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