... tube 2.High quality 3.Best price Refractory SiC TubeSi3N4 bonded SiC ceramic refractory material, is mixed with high pure SIC ... and nitrogenization. Si3N4 bonded SiC as a new type refractory material,is used widely.The applying temperature is 1400 C ... better thermal stability,thermal shock,which is better than plain refractory material and recrystallized SiC.It also has antioxidation,high corrosion ...