High-conductivity aluminum-doping zinc oxide nanometer noodles powder and preparation thereof

Abstract

The invention provides high-conductivity aluminum-doped nano-zinc oxide powder and a preparation method thereof. The method of the invention comprises the steps that aluminum-doped zinc oxide nanocrystals are first prepared by solvothermal reaction and then sintered in the atmosphere of hydrogen to obtain nanometer-degree quasi-spherical conductive powder. The conductive powder is white and slightly gray and is non-toxic, light in weight and environment-friendly and also has less conglobation, good dispersity and repeatability and uniform size distribution; in addition, the particle size of the powder synthesized in different solvents is different and the minimum resistivity of the powder can reach 15 Omega cm and can be suitable for the various demands of products. The preparation method of the invention is simple in operation, short in period and low in cost, needs no surface active agents and templates and can be applied to mass production. The nanometer-degree conductive powder obtained by utilizing the method can be taken as conductive filler to be widely applied to fields such as paints, rubber, plastics and fibers, etc., for carrying out electrostatic prevention and electromagnetic shielding.

Description

technical field [0001] The invention relates to a high-conductivity aluminum-doped zinc oxide nanopowder and a preparation method thereof. Background technique [0002] With the rapid development of science and technology and the continuous improvement of people's living standards, more and more man-made materials such as fiber, plastic, rubber, foam, paint, etc., have gradually entered the field of people's production and life. However, many physical processes such as friction, collision, electric field induction, medium polarization, and charged particle attachment between objects may cause static electricity due to the accumulation of a large amount of charge. When the static electricity accumulates to a certain extent and cannot be eliminated, a discharge phenomenon will occur. It Not only seriously affect the reliability of the product or even make it invalid, but also threaten personal safety. In the aerospace industry, electrostatic discharge can cause rocket and sat...

AI Technical Summary

Problems solved by technology

Chinese patent CN 1259244C also adopts the method of increasing the concentration of lattice defects to improve the conductivity in the method for preparing conductive powder published by Chinese patent CN 1259244C. Specifically, the mixed salt solution of the soluble salt of zinc and the soluble salt of doping elements and the precipitant are added dropwise to the In water, the reaction conditions are controlled to generate doped basic zinc carbonate, and the conductive powder is prepared by roasting in a mixed atmosphere of hydrogen and argon. This method is simple and easy, and does not require high equipment, but the crystallinity of the product is not as good as Nano-zinc oxide synthesized by solvothermal method is easy to agglomerate during high-temperature calcination, and the shape is not easy to control

[0006] Therefore, the conductive zinc oxide powder prepared by solid phase reaction method, co-precipitation method, gas phase method, etc. still needs new methods to replace it due to its difficult to control the shape, which affects product performance, or the equipment is expensive and cannot be popularized.

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