CAJ | 학술논문

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1 200～2 500℃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1 600℃后,抗氧化性能开始下降,1 600℃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.
선용강동수지위전구체,재담기보호기분하경850℃탄화제비출파리탄양품,수후재1 200～2 500℃온도범위내대양품진행고온열처리.채용동태열분석화등온열분석량충방법연구열처리온도대강동수지기파리탄양화성능적영향규률.채용X사선연사(XRD)화소묘전경(SEM)분별분석양품적정체결구화표면형모.결과표명:강동수지기파리탄적양화행위교위특별,수착열처리온도적승고,양품적항양화성능증강,단당열처리온도초과1 600℃후,항양화성능개시하강,1 600℃열처리후적양품적항양화성능최가.해양품재양화과정중표면형성망격상적기체화허다류절상잔류물,저충특수적양화형모유리우증강양품적항양화성능.
Glass-like carbons (GCs) were prepared by carbonization of acetone-furfural resin in nitrogen atmosphere at 850 ℃,followed by heat treatment over a range of 1 200-2 500 C in inert atmosphere.The effect of heat treatment temperature (HTT) on the oxidation behavior was investigated by dynamic and isothermal thermogravimetric analyses.The structure of GC was examined by X-ray diffractometry (XRD) and the morphologies of GC before and after oxidation were examined by scanning electron microscopy (SEM).It is shown that the GC samples present peculiar oxidation behavior.The anti-oxidation behavior increases with increasing the HTT to 1 600 ℃,whereas decreases gradually thereafter.GC sample heat treated at 1 600 ℃ obtains relatively optimal anti-oxidation properties under this condition.During the oxidation,this material produces grid network matrix surface and numerous nodular residues on the surface,resulting in excellent resistance to the attack of oxygen atoms.