B–Si–Zr掺杂炭材料的制备及其抗氧化性能  

Preparation and Oxidation Resistance of B–Si–Zr Doped Carbon Materials

作　　者：左小华[1] 董志军[2] 袁观明[2] 蔺少江 邓祥义[1] 李轩科[2] 

机构地区：[1]湖北理工学院化学与化工学院,湖北黄石435003 [2]武汉科技大学,湖北省煤转化与新型炭材料重点实验室,武汉430081 [3]湖北理工学院机电工程学院,湖北黄石435003

出　　处：《硅酸盐学报》2016年第6期824-829,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金重大研究计划重点项目(91016003);国家自然科学基金面上项目(51372077);湖北理工学院创新人才项目(13xjz02c)资助

摘　　要：以煤沥青甲苯可溶组分、聚碳硅烷、吡啶硼烷和ZrB_2有机前驱体为原料,通过低温裂解制备掺杂沥青,经过不同温度热处理得到B–Si–Zr掺杂炭材料,考察了掺杂炭材料抗氧化性能。用X射线衍射仪、扫描电子显微镜等对B–Si–Zr掺杂炭材料氧化前后的物相组成和微观结构进行表征。结果表明:1600℃热处理得到的B–Si–Zr掺杂炭材料中,ZrB_2陶瓷颗粒逐渐形成,在氧化过程中,SiC和ZrB_2等陶瓷与氧气反应生成SiO_2、B_2O_3和ZO_2,氧化物在炭材料表面形成保护膜,该热处理温度得到的掺杂炭材料抗氧化性较强。B-Si-Zr doped carbon materials were prepared via heat treatment at different temperatures with toluene soluble fraction of coal tar pitch, polycarbosilane, pyridine borane and ZrB2 precursor as raw materials. The oxidation behavior of B-Si-Zr doped carbon materials was investigated. The phase composition and microstructure of the samples were characterized by X-ray diffraction and scanning electron microscopy. The results show that ZrB2 ceramic particles are gradually formed in the heat treatment of carbon materials at 1 600℃. The reaction among SiC, ZrB2 and oxygen produces SiO2, B2O3 and ZrO2 in the process of oxidation. The oxide can form a protective film on the surface of the carbon materials, which improves the oxidation resistance of the B-Si-Zr doped carbon materials obtained by heat treatment at 1 600 ℃.

关 键 词：硼-硅-锆掺杂炭材料 抗氧化性能 碳化硅 硼化锆 

分 类 号：TB332[一般工业技术—材料科学与工程]