A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method for preparing silicon carbide powder from polycrystalline silicon cutting wastes
The invention relates to a method for preparing silicon carbide powder from polycrystalline silicon cutting wastes. The method for preparing silicon carbide powder comprises the steps of after grinding and sieving, adding polycrystalline silicon cutting wastes serving as raw materials into a leaching solution to carry out wet leaching to remove iron; carrying out suction filtration, cleaning and drying to obtain iron-removed polycrystalline silicon wastes; adding carbon powder into the iron-removed polycrystalline silicon wastes, grinding and uniformly mixing; then, adding an adhesive, briquetting and forming; and carrying out reactive sintering in the argon atmosphere in a high-temperature furnace to prepare the silicon carbide powder. According to the method, the polycrystalline silicon cutting wastes are used as the raw materials, so that the production cost is reduced; in addition, the method is simple in production process and low in energy consumption; and the obtained silicon carbide powder has the characteristic of high strength and has a very high commercial value.
Method for preparing silicon carbide powder from polycrystalline silicon cutting wastes
The invention relates to a method for preparing silicon carbide powder from polycrystalline silicon cutting wastes. The method for preparing silicon carbide powder comprises the steps of after grinding and sieving, adding polycrystalline silicon cutting wastes serving as raw materials into a leaching solution to carry out wet leaching to remove iron; carrying out suction filtration, cleaning and drying to obtain iron-removed polycrystalline silicon wastes; adding carbon powder into the iron-removed polycrystalline silicon wastes, grinding and uniformly mixing; then, adding an adhesive, briquetting and forming; and carrying out reactive sintering in the argon atmosphere in a high-temperature furnace to prepare the silicon carbide powder. According to the method, the polycrystalline silicon cutting wastes are used as the raw materials, so that the production cost is reduced; in addition, the method is simple in production process and low in energy consumption; and the obtained silicon carbide powder has the characteristic of high strength and has a very high commercial value.
Method for preparing silicon carbide powder from polycrystalline silicon cutting wastes
ZHANG GUOHUA (author) / WU YUEDONG (author) / ZHOU GUOZHI (author)
2016-02-03
Patent
Electronic Resource
English
SILICON CARBIDE POWDER METHOD AND APPARATUS FOR PREPARING SILICON CARBIDE POWDER
European Patent Office | 2019
Method for preparing silicon nitride or silicon nitride/silicon carbide composite powder
| European Patent Office | 2015
| European Patent Office | 2024