摘要
通过一体烧结法将改性碳纤维和陶瓷粉末(高岭土,长石和石英)结合起来制备改性碳纤维陶瓷基复合材料。烧制过程在氮气氛围下同时实现碳纤维的抗氧化保护作用和无机前驱体的陶瓷化。通过扫描电镜(SEM)、热重分析仪(TGA)、X射线衍射仪(XRD)对该复合材料内的碳纤维进行表征,涂覆抗氧化涂层使得碳纤维在高温(1100~1200℃)下烧结时能保持其完整性,进而保证所制备的改性碳纤维陶瓷基复合材料具备显著的电热效应。改性碳纤维陶瓷基复合材料的电热效率与碳纤维束长度、碳纤维束根数有关。碳纤维束越长、根数越多,复合材料的电热效率越高。良好的电热特性和稳定性能使该复合材料具有潜在的应用价值。将该复合材料投入工业化生产能改善传统的室内采暖设备耗电量大、用电安全隐患等问题,是室内采暖的理想选择。
A conductive composite was prepared by combining carbon fiber and ceramic powder(kaolin,feldspar and quartz)in a one-step firing process.Firing process simultaneously achieves the oxidation protection of carbon fibers and the ceramization of inorganic precursors under a nitrogen atmosphere.Carbon fiber in the composite was characterized by scanning electron microscopy(SEM),thermogravimetric analyzer(TGA)and X-ray diffraction(XRD).Anti-oxidation coating allows the carbon fiber to maintain its integrity when sintered at high temperatures(1100-1200℃),thus ensuring that the modified carbon fiber ceramic matrix composite has a significant electrothermal effect.The electrothermal efficiency of the composite is related to the length of the carbon fiber bundle and the number of carbon fiber bundles,the longer the carbon fiber bundle,the more the number of roots,the greater the electrothermal efficiency of the composite.Good electrothermal properties and stability can make the composite have potential application.Putting the composite material into industrial production can resolve the problems of large power consumption and potential safety hazards of traditional indoor heating equipment,and it is an ideal choice for indoor heating.
作者
胡晶
熊祎
陈春亮
王慧鹏
董雄伟
陈悟
HU Jing;XIONG Yi;CHEN Chunliang;WANG Huipeng;DONG Xiongwei;CHEN Wu(National Local Joint Engineering Laboratory for Advanced Textile Processing and Clean Production,Science and Technology Institute,Wuhan Textile University,Wuhan 430200,China;School of Physics and Technology,Center for Electron Microscopy,Wuhan University,Wuhan 430072,China)
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2021年第6期953-960,共8页
Journal of Materials Science and Engineering
基金
国家自然科学基金资助项目(21701128)
湖北省自然科学基金资助项目(2017CFB206)。
关键词
一体烧结
抗氧化涂层
陶瓷
复合材料
电热性能
热分布
One-step firing
Anti-oxidation coating
Ceramic
Composite
Electrothermal property
Heat distribution
