摘要
以化学有机改性对立方碳化硅(β-SiC)导热填料进行表面修饰,通过红外光谱对处理后β-SiC粉体表征。以硅烷偶联剂、硬脂酸以及二者的结合为改性剂,研究不同改性剂对β-SiC粉体固含量、吸油值及导热系数的影响。实验结果表明,在硅烷偶联剂中KH564的改性效果较为明显;通过对硬脂酸以及两种表面改性剂结合使用的研究,结果表明改性效果相比单一改性剂进一步提升,硬脂酸和KH564的效果较好,导热系数达到1.46 W/(m·K),相比未改性的β-SiC提高了53.68%,比使用单一KH564改性提高了20.25%。
The surface modification of cubic silicon carbide(β-SiC)thermally conductive filler was carried out by chemical organic modification,and the treatedβ-SiC powder was characterized by infrared spectroscopy.The effects of different modifiers on the solid content,oil absorption value and thermal conductivity ofβ-SiC powder were studied by using silane coupling agent,stearic acid and the combination of the two as modifiers.The experimental results show that the modification effect of KH564 in silane coupling agent is obvious.Through the study of stearic acid and the combination of two surface modifiers,the results show that the modification effect is further improved compared with the single modifier.Stearic acid and KH564 have better effects,and the thermal conductivity is 1.46 W/(m·K),which is 53.68%higher than that of unmodifiedβ-SiC and 20.25%higher than that with single KH564.
作者
张亚丽
王晓刚
张蕾
段晓波
ZHANG Yali;WANG Xiaogang;ZHANG Lei;DUAN Xiaobo(College of Materials Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China;Shaanxi Eegineering Research Center of Energy Saving and Polygeneration in Silicon and Magnesium Industry, Xi’an 710054, China)
出处
《硅酸盐通报》
CAS
北大核心
2020年第3期937-941,共5页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金青年项目(516002254)。
关键词
立方碳化硅
硅烷偶联剂
硬脂酸
导热系数
β-SiC
silane coupling agent
stearic acid
thermal conductivity
