Tel: +86-510-87330163


Home > Knowledge > Content
Improve the performance of Oxide Bonded Silicon Caribdes and remove impurities
- Nov 05, 2018 -

Oxide-bonded silicon carbide products are used in a wide range of applications in the fields of petroleum, chemical, automotive, machinery and aerospace. It is urgent to improve the manufacturing technology and reduce the production cost while improving the performance of oxide-bonded silicon carbide products. The realization of low-temperature sintering of silicon carbide products can significantly reduce energy consumption, significantly reduce production costs, and promote the industrialization of silicon carbide products.


Compared with other structural ceramics, the silicon carbide raw materials used for oxide-bonded silicon carbide products are rich in sources and have many preparation methods, which can adapt to various requirements of different working conditions, and are the most likely to form industrial scale projects except alumina. Structural ceramics, manufacturers pay great attention to the research and application development of silicon carbide materials.


The oxide-bonded silicon carbide products produced may contain impurities, and the most common method of removal is the acid-base method. Pickling usually treats silicon carbide particles with sulfuric acid under heating conditions. The main purpose is to remove metal iron, iron oxide, magnesium, aluminum and other impurities in the silicon carbide. This makes it possible to remove impurities in the oxide-bonded silicon carbide product very cleanly and conveniently.


The alkali washing of the oxide-bonded silicon carbide product is usually carried out by heating the silicon carbide particles with NAOH under heating conditions, the main purpose of which is to remove the free silicon, silicon dioxide, etc., so as to increase the content of silicon carbide. Strengthen its silicon carbide content.