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文章利用葡萄糖水热法合成炭微球,并用氢氧化钾进行烧结处理,得到多孔结构的炭微球。在以硝酸铁为催化剂的条件下,对多孔炭微球进行不同温度下的石墨化处理,利用SEM、XRD、FTIR和BET对材料进行了表征。结果表明,炭微球表现出了良好的球形形貌、丰富的孔结构及大的比表面积。炭微球在经过1500℃处理后,其石墨化程度达90%。通过对石蜡进行物理吸附,制备了多孔石墨化炭微球/石蜡相变复合材料并用作热界面材料,其热导率随石墨化温度的增加而增加。
In this paper, carbon microspheres were synthesized by the hydrothermal method of glucose and sintered with potassium hydroxide to obtain carbon microspheres with porous structure. Under the condition of ferric nitrate as catalyst, the graphitization of porous carbon microspheres was carried out at different temperatures, and the materials were characterized by SEM, XRD, FTIR and BET. The results showed that the carbon microspheres showed a good spherical morphology, rich pore structure and large specific surface area. Carbon microspheres after treatment at 1500 ℃, the degree of graphitization of 90%. By physical adsorption of paraffin, porous graphitized carbon microspheres / paraffin phase-change composites were prepared and used as thermal interface materials, the thermal conductivity of which increased with the increase of graphitization temperature.