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Conducting powder by using laminar soilicate mineral as basal body, and preparation method

A layered silicate, conductive powder technology, applied in conductive materials, conductive materials, conductors and other directions, can solve the problems of poor conductivity, low cost of carbon black, large graphite properties, etc., to achieve easy purification and dispersion, Simple preparation method and stable electrical conductivity

Inactive Publication Date: 2006-02-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among the currently used conductive powders, carbon black is the cheapest and most widely used, but its electrical conductivity is not good, and the cohesion between the particles is very strong, so it is difficult to mix evenly with other materials
Carbon fiber is expensive and difficult to process; the performance of graphite varies greatly depending on the place of origin, and it is difficult to crush
Gold powder and silver powder are expensive, and copper powder, nickel powder, aluminum powder, etc. are easy to oxidize, and the conductivity will decrease or even become non-conductive after oxidation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for preparing conductive powder with palygorskite as a matrix, comprising the following steps:

[0024] 1) Weigh 10 kg of separated and purified palygorskite and 30 kg of water, add 0.1 kg of sodium tripolyphosphate, and use a high-shear dispersing emulsifier to stir, so that the mineral particles are evenly dispersed to make a suspension slurry;

[0025] 2) Spray-drying the suspension slurry by spray-drying method to obtain palygorskite powder;

[0026] 3) The palygorskite powder and nitrogen gas are introduced into the preheating zone of the reaction device, and heated to 300° C.; the mixture of palygorskite powder and nitrogen gas automatically flows into the reaction zone, and acetylene gas is introduced and heated to 500° C.; Conductive powder based on palygorskite.

Embodiment 2

[0028] A method for preparing conductive powder with montmorillonite as a matrix, comprising the following steps:

[0029] 1) Weigh 10 kg of separated and purified montmorillonite and 8 kg of water, add 0.5 kg of sodium lignosulfonate, and stir with a high-shear dispersing emulsifier to make the mineral particles evenly dispersed and make a suspension slurry;

[0030] 2) Spray-drying the suspension slurry by spray-drying method to obtain montmorillonite powder;

[0031] 3) Import montmorillonite powder and nitrogen into the preheating zone of the reaction device, and heat to 400°C; the mixture of montmorillonite powder and nitrogen automatically flows into the reaction zone, introduce methane gas and heat to 600°C; Conductive powder based on montmorillonite.

Embodiment 3

[0033] A method for preparing conductive powder with sepiolite as a matrix, comprising the following steps:

[0034] 1) Weigh 10 kg of separated and purified sepiolite and mix with 5 kg of water, add 0.2 kg of tetrasodium pyrophosphate, and stir with a high-shear dispersing emulsifier to disperse the mineral particles evenly and make a suspension slurry;

[0035] 2) Spray-drying the suspension slurry by spray-drying method to obtain sepiolite powder;

[0036] 3) Introduce sepiolite powder and nitrogen into the preheating zone of the reaction device, and heat to 500°C; the mixture of sepiolite powder and nitrogen automatically flows into the reaction zone, import natural gas and heat to 700°C; in the collection area, the following Sepiolite is the conductive powder of the matrix.

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PUM

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Abstract

The current conducting powder is mineral of layer silicate clad by carbon film. Method includes steps: (1) mixing one portion of mineral of layer silicate (weight) with 3-8 portions of water; adding 0.01-0.05 portions of dispersant into the admixture; mixing round to make the admixture even by dispersion emulsion machine with high shear to obtain suspension ore pulp; (2) carrying out spray drying the ore pulp to obtain powder of mineral of layer silicate; (3) under 300-500 deg.C, inducting nitrogen into powder of mineral of layer silicate so as to obtain their admixture; under 500-900 deg.C, inducting gas from carbon source into the said admixture to produce powder with mineral of layer silicate as basal body. Cost of raw material is low, since mineral of layer silicate is wide distributed. Comparing with conducting powder in carbon or metal series, the disclosed powder possesses advantages of easy of purification and decentralization, stable and high ration of performance.

Description

technical field [0001] The invention relates to a conductive powder with layered silicate mineral as the matrix and a preparation method thereof. Background technique [0002] Conductive powder is a kind of functional material, which is mainly used as a filling material for polymer materials (including conductive coatings), so that polymer materials have functions such as conductivity, antistatic, and electromagnetic wave shielding. Conductive powder can generally be divided into carbon series (carbon black, carbon fiber, graphite), metal series (metal powder, metal sheet, metal fiber) and metal oxide series. [0003] With the rapid development of social economy, the application range of polymer materials such as various plastics, fibers, rubber, coatings, etc. is expanding day by day. These materials are prone to static electricity due to friction, impact, etc., and the accumulation of static electricity to a certain extent will cause discharge, and may even cause breakdow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/00C04B35/16C04B33/00C01B31/02
Inventor 叶瑛程继鹏张孝彬邬黛黛季珊珊黄霞陈雪刚张维睿
Owner ZHEJIANG UNIV
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