Room temperature mechanical force solid phase chemical reaction preparation of antimony-doped nano stannic oxide

Abstract

The invention discloses a room-temperature mechanical force solid-phase chemical reaction method for stibium-doped nanometer tin dioxide and relates to a technology for preparing the stibium-doped nanometer tin dioxide in anti-electrostatic painting, plastic, fibre and other fields. Stanniferous inorganic salt and antimonial inorganic salt are used as reactants; and oxalic acid, ammonium carbonate, ammonium hydrogen carbonate, sodium oxalate or sodium bicarbonate and the like are used as ligands. The method comprises the following process steps: the materials are matched, are mixed and are subjected to room-temperature mechanical force solid-phase chemical reaction to prepare a precursor; the precursor is subjected to impurity removal, drying and thermal decomposition to obtain the target product. The method is characterized in that water is not introduced in the reaction process to prevent the hydrolysis of tin ions and stibium ions so as to realize even doping; simultaneously, the method utilizes shearing force and impacting force produced in the ball milling process to crush a solid-phase reaction system, increases the specific surface areas of the reactants and increases the speed of reaction to prepare the superfine and even precursor; the precursor is washed and dried; and the temperature and the time for thermal decomposition are controlled, thereby obtaining the nanometer tin dioxide doped powder body which has distribution of particle diameter of between 30 and 80 nm and a controllable pattern.

Description

1. Technical field [0001] The invention patent belongs to "nano-oxide powder preparation technology", which relates to antimony-doped nano-tin dioxide and its preparation method that can be used in antistatic coatings, plastics, fibers and other fields. 2. Background technology [0002] Antimony-doped tin dioxide (ATO) powder has been widely used due to its excellent properties such as high electrical conductivity, light color transparency, good stability and weather resistance, especially after the powder is nano-sized, due to its large specific A series of new features such as surface area have greatly improved its performance. At present, the preparation methods of nano-tin dioxide and its blends mainly include: chemical co-precipitation method, hydrothermal method, sol-gel method, metal alkoxide hydrolysis method, solid-phase method and so on. For example: the Chinese patent application number 200310107905.0 adopts tin compounds and organic substances with complexing ab...

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Problems solved by technology

[0003] From the content of the above Chinese patent application, it can be seen that the traditional solid-phase method is simple to operate and low in cost, but the reaction speed is slow, and it is difficult to achieve uniform mixing during doping; the cost of hydrothermal method, sol-gel method and metal alkoxide hydrolysis method Higher, the chemical co-precipitation method has strict requirements on the precipitation conditions such as pH value, and it is easy to cause the hydrolysis of antimony and tin ions, and improper control will also cause uneven doping

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