掺杂石墨导热性能的研究

制备了一系列掺杂石墨并研究了其导热性能，实验结果表明，与相同条件下制得的纯石墨相比，掺杂石墨的导热系数均有较大的提高，掺杂钛组元可使石墨材料的导热性能有所提高，而硅组元的加入可大大提高石墨材料的导热性能，硼组元的加入则使石墨材料的导热性能明显下降，这与硼原子可溶入石墨晶格而造成晶格缺陷有关，XRD分析结果表明掺杂石墨都具有大的晶格尺寸，高的石墨化程度，这与掺杂组元的催化石墨化作用有关。

RESEARCH ON THERMAL CONDUCTIVITY OF DOPED GRAPHITE

Thermal conductivity of some doped graphite was investigated inorder to discuss the effect of dopants on the doped graphite. Results show that the doped graphite exhibits higher thermal conductivity than the pure graphite produced by same process. Thermal conductivity of the graphite can be improved by doping titanium. And doping titanium and silicon simultaneously into the graphite can improve the thermal conductivity much greatly. Adding boron can result in the decrease of thermal conductivity for boron can go into the lattice and form defects of graphite lattice. XRD analysis shows that the doped graphite has large crystalline and high graphitization degree.