摘要
采用硅烷偶联剂KH-550对氮化硅(β-Si3N4)进行表面处理,浇注制备氮化硅/环氧树脂(Si3N4/EP-828)复合材料,研究了Si3N4粒径、用量和表面改性对复合材料导热性能和力学性能的影响。结果表明,Si3N4/EP-828的导热性能随Si3N4用量的增加而提高,当Si3N4体积分数为30%时,热导率为0.83W/mK,为纯环氧树脂4倍多;力学性能则随Si3N4用量的增加先增大后降低。表面改性有助于进一步提高复合材料的导热性能和力学性能。初步分析表明,Si3N4/EP-828热导率与Si3N4形成的导热网链和Si-O-Si键导热骨架有关。
The silicon nitride（Si3N4） particles modified with silane coupling agent KH-550 were used to prepare Si3N4/EP-828 composites via casting method.The effects ofpartical size, volume fraction and surface modification of Si3N4 on the thermal conductivity and mechanical properties of composites were investigated.The results showed that the thermal conductivity increased with increasing volume fraction of Si3N4; the thermal conductivity was 0.83W/mK when the SiaN4 volume fraction was 30%, it was over 4 times of that of native EP- 828.The mechanical properties increased firstly and then decreased with increasing the amount of Si3N4.The thermal conductivity and mechanical properties of the composites were improved after treating of Si3N4.
出处
《粘接》
CAS
2010年第11期49-52,共4页
Adhesion
关键词
氮化硅
环氧树脂
导热复合材料
表面改性
Si3N4
epoxy resin
thermal conductivity composites
surface modification
