氮化硼掺杂改性石墨复合材料的制备及性能研究  

Preparation and properties of graphite composites with boron nitride doping

作　　者：赵红超[1] 张俊鹏[1] 连鹏飞[1] 刘犇[1] 雷世文[1] 刘占军[1] Zhao Hong-chao;Zhang Jun-peng;Lian Peng-fei;Liu Ben;Lei Shi-wen;Liu Zhan-jun(Key Laboratory of Carbon Materials,Institute of Coal Chemistry,Chinese Academy of Sciences,Shanxi Taiyuan 030001,China)

机构地区：[1]中国科学院山西煤炭化学研究所炭材料重点实验室,山西太原030001

出　　处：《炭素技术》2021年第4期59-63,共5页Carbon Techniques

基　　金：国家自然科学基金(91860116)。

摘　　要：采用二次焦工艺,以氮化硼陶瓷颗粒为沥青半焦化的诱导剂与形核核心,通过原料混合、液相半炭化以及机械破碎,制备出原位生焦包覆的复合氮化硼陶瓷压粉。再经过成型、炭化以及石墨化等工艺,制备出氮化硼掺杂改性自烧结石墨复合材料。测试结果表明,当氮化硼添加量为9%时,材料内部元素均匀分布,抗折、抗压强度达到78.28 MPa与168.77 MPa,在900℃时体现出较好的抗氧化效果,摩擦因数与磨损量达到最佳,是制备抗氧化、耐磨材料的优选方案。Boron nitride(BN)ceramic powders coated with in-situ coke prepared by secondary coke process,as the inducer and nucleation core of asphalt semi coking,are prepared by mixing raw materials,liquid phase semi-carbonization and mechanical crushing.After forming,carbonization and graphitization,BN doped self-burning graphite composites are prepared.The results show that the internal elements of the material are evenly distributed,the flexural strength and compressive strength reach 78.28 MPa and168.77 MPa,respectively,and the material shows good oxidation resistance at 900℃.The friction coefficient and wear amount of composite with the boron nitride addition of 9%reach the best ratio,which is the preferred scheme for preparing oxidation-resistant and wear-resistant materials.

关 键 词：自烧结 等静压 高温抗氧化 摩擦磨损 

分 类 号：TQ175.714[化学工程—硅酸盐工业]