添加剂对尖晶石碳质材料性能的影响  

Effects of additives on properties of spinel carbon materials

作　　者：郑卫[1] 杨金松[1] 李红霞[1] 刘国齐[1] 

机构地区：[1]中钢集团洛阳耐火材料研究院有限公司先进耐火材料国家重点实验室,河南洛阳471039

出　　处：《耐火材料》2016年第5期348-351,358,共5页Refractories

基　　金：国家自然科学基金资助项目(51372231)

摘　　要：为提高尖晶石碳质材料的抗热震性和抗冲刷性,以尖晶石、石墨和不同种类添加剂(铝-硅合金、硅粉、B4C、Si C)为原料,热塑性酚醛树脂为结合剂,在氮气保护下经950℃热处理后,制备了石墨含量为8%(w)的尖晶石碳质材料,探究了添加剂对尖晶石碳材料力学性能、抗热震性和抗氧化性的影响。结果表明:1)铝-硅合金或B4C能明显提高尖晶石碳材料的常温抗折强度,但会降低材料的抗热震性,B4C对材料的抗热震性最不利,硅粉和Si C对常温抗折强度影响不大,但能显著提高抗热震性;2)铝-硅合金或硅粉能显著提高材料的高温抗折强度,B4C或Si C对高温强度影响不大。3)经950℃热处理后,B4C对提高材料的抗氧化性作用不明显,单独加入硅粉、铝-硅合金和B4C复合添加均能提高抗氧化性能。In order to improve the thermal shock resistance and erosion resistance of spinel carbon materi-als,the spinel carbon specimens with 8 mass% flake graphite were prepared using spinel,graphite and additives （Al-Si alloy,silicon powder,B4 C,and SiC,respectively）as starting materials,and thermoplastic phenolic resin as a binder,hot treating at 950 ℃ under the protection of nitrogen.Effects of additives on the mechanical properties,thermal shock resistance and oxidation resistance of spinel carbon materials were investigated.The results show that：（1）Al-Si alloy or B4 C can significantly improve the CMOR of the speci-mens,but decrease the thermal shock resistance.B4 C is the worst for the thermal shock resistance,silicon powder and SiC have unobvious effect on CMOR,but they can obviously enhance the thermal shock resist-ance;（2）Al-Si alloy or silicon powder can significantly improve the HMOR of the specimens,B4 C or SiC has little effect on hot strength;（3）after hot treated at 950 ℃,B4 C has unobvious effect on oxidation resist-ance,adding silicon powder or （Al-Si alloy ＋B4 C）can improve the oxidation resistance.

关 键 词：添加剂 尖晶石碳材料 力学性能 抗热震性 抗氧化性 

分 类 号：TQ175[化学工程—硅酸盐工业]