摘要
以两种不同酚醛泡沫为先驱体,参照各自的DTG曲线,经过高温炭化处理得到泡沫炭。采用微机控制电子万能试验机对泡沫炭进行压缩强度测量;采用激光法导热分析仪对泡沫炭的三个热常数:热扩散系数a、导热系数λ、比热容cp进行测量。采用分析型扫描电镜(SEM)对泡沫炭微观结构进行分析;利用全自动压汞仪对泡体的开孔率进行测定。结果表明,细腻、均匀、开孔率低的先驱体泡孔结构有利于提高泡沫炭的比强度及隔热性能。
Carbon foams were prepared from the precursor of two different phenolic foams by carbonization treatment according to the DTG curves. Compressive strength and three thermal coefficients including thermal diffusion, thermal transmition and specific heat of the carbon foams were measured. Microstructure and pore diameter distribution of phenolic foams and carbon foams were investigated by scanning electron microscopy. It was found that small and homogeneous pore structure and low open-cell ratio of the precursor can enhance the properties of specific strength and insulation of carbon foams.
出处
《炭素技术》
CAS
CSCD
2008年第2期5-8,共4页
Carbon Techniques
关键词
泡沫炭
先驱体
酚醛泡沫
炭化
Carbon foam
precursor
phenolic foam
carbonization
