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选用糠酮树脂为前驱体,在氮气保护气氛下经850℃炭化制备出玻璃炭样品,随后在1200～2500℃温度范围内对样品进行高温热处理。采用动态热分析和等温热分析两种方法研究热处理温度对糠酮树脂基玻璃炭氧化性能的影响规律。采用X射线衍射(XRD)和扫描电镜(SEM)分别分析样品的晶体结构和表面形貌。结果表明:糠酮树脂基玻璃炭的氧化行为较为特别,随着热处理温度的升高,样品的抗氧化性能增强,但当热处理温度超过1600℃后,抗氧化性能开始下降,1600℃热处理后的样品的抗氧化性能最佳。该样品在氧化过程中表面形成网格状的基体和许多瘤节状残留物,这种特殊的氧化形貌有利于增强样品的抗氧化性能。
The glass-carbon samples were prepared by carbonization at 850 ℃ under nitrogen atmosphere with furfuron-methyl resin as precursor. The sample was then heat-treated at 1200-2500 ℃. Dynamic thermal analysis and isothermal analysis were used to study the effect of heat treatment temperature on the oxidation of furfural resin based glassy carbon. The crystal structure and surface morphology of the samples were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that the oxidation behavior of the chalcone resin-based glassy carbon was special. With the increase of the heat treatment temperature, the oxidation resistance of the sample was enhanced. However, the oxidation resistance of the sample started to decrease when the heat treatment temperature was over 1600 ℃. After the heat treatment at 1600 ℃ The sample has the best oxidation resistance. During the oxidation, the sample formed a grid-like matrix and many nodosum residues on the surface. This special oxidation morphology was helpful to enhance the oxidation resistance of the sample.