How to improve the purity of silicon carbide?
Silicon carbide powder with impurities will greatly affect the use range of silicon carbide and reduce the price and quality of silicon carbide. Silicon carbide powder has a high melting point and hardness, relatively stable chemical and physical properties. High-purity silicon carbide micropowder is widely used in modern industrialization and other fields, but silicon carbide is relatively easy to introduce impurities during smelting or processing, among which the iron element of ferric oxide is one of them.
The advantage of the chemical method of iron removal in silicon carbide micropowder is that it is a more thorough and clean method for dealing with impurity iron elements in silicon carbide, but the silicon carbide after chemical treatment is easy to agglomerate, and the method is more complicated. The physical method of iron removal in silicon carbide ultrafine powder mainly uses mechanical physical iron removal method, which requires the use of magnetic separator equipment to collect iron impurities in silicon carbide fine powder by using the principle of magnets. The magnetic separator equipment has different specifications and the collection effect is different. .
The method of using a magnetic separator is more convenient and quick, only need to buy equipment, but the effect of using a magnetic separator to remove iron is limited, it can only improve the purity of silicon carbide, make it qualified for use, and cannot completely remove For iron, those who need silicon carbide micropowder products with higher purity can repeat magnetic separation multiple times or use chemical methods to remove iron, and those who want to increase the purity of silicon carbide and reduce the element of silicon carbide iron can use physical magnetic separation equipment.
