Spherical silica powder is an interdisciplinary and difficult project. Only a few in the world, such as Japan, the United States, Canada, Germany and Russia, have mastered this technology. Because this technology involves the development of high-performance chip technology, the technology of spheronization of silicon micropowder is highly confidential abroad, and the parameters of foreign products obtained are incomplete, and special equipment is rare.

This method uses high-temperature gas generated by AC or DC arc plasma as a heat source, and sprays quartz powder into a plasma flame. The powder is heated and melted and instantly vaporized, and then quenched, collected by a cyclone and a cloth bag to obtain a spherical shape. Silicon powder.

It is characterized by high heating temperature, which can obtain a temperature field that is more than 5 times higher than chemical combustion (above 3000K). The high temperature, high heat and high active atmosphere make the chemical reaction proceed very quickly, resulting in the rapid formation of high temperature phase compounds that are difficult to synthesize by chemical liquid phase method. (Such as nitrides, carbides and borides, etc.); when the reaction material leaves the plasma, the particles will no longer grow after rapid cooling; the plasma state of different atmospheres can be formed according to different needs, and the range of reactants is wide.

Disadvantages: Plasma technology is very difficult. First, the plasma temperature field is affected by the magnetic and electrical properties of the plasma. The temperature field is small and concentrated. The stable high temperature field of the heating device is not easy to control, and the temperature range is not easy to adjust; secondly, the plasma The generation of energy and jets is achieved by the passage of electric current through the ionized gas medium. Too much dilution of the plasma will interrupt the current and lose its effect. These factors make the spheroidization rate of the product difficult to control and difficult to form large-scale production.

The above is what kind of process route is adopted for the spherical silica powder described by the editor? You can simply understand it. The content is for reference, you can contact us at any time if you want to know more inquiries.