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文章编号： 1672-6987（2021）02-0073-06； DOI： 10.16351/j.1672-6987.2021.02.010
楚肖莉1， 孙立军2， 查鲲鹏2， 郝春成1*(1.青岛科技大学 材料科学与工程学院，山东 青岛 266042；2.中电普瑞电力工程有限公司，北京 102200）
摘要： 以熔盐法制备了片状氧化铝、以喷雾干燥法制备了球形氮化硼，以二者为填料、二甲基硅油为基体制备了导热膏。利用扫描电子显微镜、透射电子显微镜和X射线衍射仪对制备的粉体进行了表征，研究了片状氧化铝和球形氮化硼的添加量对提升导热膏的导热系数的影响。结果表明:在单一片状氧化铝填料的量(体积分数)从20%增加到65%的过程中，导热膏的导热效率随填料量的增加而不断增加，在添加球形氮化硼的导热膏中也有相似的规律；当两种填料同时使用时导热效果较好，片状氧化铝的添加量为60%时，导热系数最大值为276 W·(m·K)-1。
关键词： 导热膏； 片状氧化铝； 球形氮化硼； 导热率
中图分类号： O 063文献标志码： A
引用格式： 楚肖莉， 孙立军， 查鲲鹏， 等. 片状氧化铝/球形氮化硼导热膏的制备及表征［J］. 青岛科技大学学报(自然科学版), 2021, 42(2): 73-78.
CHU Xiaoli, SUN Lijun, ZHA Kunpeng, et al. Preparation and characterization of alumina platelets/spherical boron nitride thermal grease［J］. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2021， 42(2)： 73-78.
Preparation and Characterization of Alumina Platelets/Spherical
Boron Nitride Thermal Grease
CHU Xiaoli1, SUN Lijun2, ZHA Kunpeng2, HAO Chuncheng1
(1.College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;
2.C-EPRI Electric Power Engineering Co., Ltd., Beijing 102200, China)
Abstract: Flaky alumina was synthesized by a molten-salt method,and spherical boron nitride was prepared by the spray drying method. The thermal grease was prepared by mixing the alumina platelets and the spherical boron nitride in dimethyl silicon oil. The alumina platelets and the spherical boron nitride were characterized by scanning electron microscope, transmission electron microscope and X-ray diffraction. The effects of the addition of aluminaplatelets and spherical boron nitride were studied. The results showed that the thermal conductivity increased with the volume fraction of alumina fillers increasing from 20% to 65%, when the alumina filler was replaced with spherical boron nitride, the similar thermal conductivity increase occurred in new thermal grease. When the volume fraction of flaky alumina is 60%,the maximum thermal conductivity is 2.76 W·(m·K)-1.
Key words: thermal grease; alumina platelets; spherical boron nitride; thermal conductivity
收稿日期： 2020-04-20
基金项目： 中电普瑞电力工程有限公司项目(SGNRGFPGWLJS1900958).
作者简介： 楚肖莉(1996—),女,硕士研究生.*通信联系人.
