摘要
以氮化硅为基体,通过加入一定量的酚醛树脂等添加剂,成功制备出了具有高强度和较高气孔率的氮化硅多孔陶瓷。实验结果表明:酚醛树脂裂解所产生的玻璃碳,与Si_3N_4表面的SiO_2或Si_3N_4颗粒本身反应,生成了极细的SiC颗粒,钉扎在β-Si_3N_4晶界,可以有效增加材料的强度。制得了强度>160MPa、气孔率>45％的氮化硅多孔陶瓷。
Porous Si_3N_4 ceramics with a high strength and a relative high porosity were obtained by the addition of a small amount of phenolformaldehyde resin. The effects of phenolformaldehyde resin content, sintering temperature and reaction time on porous Si_3N_4. ceramics were initially studied. It was showed that SiC particles could pin the β-Si_3N_4 grains boundaries and had an effective reinforcing effect, which formed through reaction of the glassy carbon with SiO_2 on Si_3N_4 surface or with Si_3N_4 particles themselves. Sintered Si_3N_4 porous ceramics with 160MPa strength and >45% porosity were obtained.
出处
《陶瓷科学与艺术》
CAS
2004年第1期4-8,共5页
Ceramics Science & Art
关键词
氮化硅陶瓷
多孔陶瓷
酚醛树脂
裂解
玻璃碳
Porous Ceramics Phenolformaldehyde Resin Silicon Nitride Silicon Carbide
