Abstract:

Calcium lignosulphonate is used as bonding agent in the production process of silicon nitride bonded silicon carbide.The pores provide favorable conditions for nitridation firing which are formed by calcium lignosulphonate ignition loss in nitridation firing process.Calcium lignosulphonate is now added in the  forms of liquid and powder.This paper studies the effects of the two forms on the performance of silicon nitride bonded silicon carbide products, and the result shows that calcium lignosulphonate added in liquid is better than in powder.