Abstract Carbon fiber/ceramic composite demonstrates excellent electro-thermal performance that can be applied in various heating applications. However high temperature ceramization inevitably causes oxidation of carbon fiber and negatively influences its electro-thermal property. Herein, a graphene coated carbon fiber/ceramic composite via one-step firing with rapid and stable temperature responsiveness is proposed. Crystal structure, morphological feature, electrical property and electrothermal behavior of the modified carbon fibers and carbon fiber/ceramic composite were investigated. The results showed effectively protective effect of coating and sintering of carbon fiber under N2 environment, resulting in greatly improved electro-thermal and mechanical properties. The composite based on 24 k carbon fibers and 1 cm thickness ceramic sintering reached about 65 °C at 6 V in only 10 min and the cooling process lasted 30 min from 82 °C to room temperature, presenting highly responsive heating and good temperature storage performance. The tensile strength and elongation at break of the single graphene coated carbon fiber increased 12% and 200%. The great electro-thermal features and strong mechanical properties of the modified carbon fibers make the carbon fiber/ceramic composite a good candidate for in-door temperature control and out-door deicing applications.

中文翻译：

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用于高性能电热复合材料的碳纤维和陶瓷前驱体的一步烧制：石墨烯涂层的影响

摘要 碳纤维/陶瓷复合材料具有优异的电热性能，可用于各种加热应用。然而，高温陶瓷化不可避免地会导致碳纤维氧化并对其电热性能产生负面影响。在此，提出了一种石墨烯涂覆的碳纤维/陶瓷复合材料，通过一步烧制，具有快速且稳定的温度响应能力。研究了改性碳纤维和碳纤维/陶瓷复合材料的晶体结构、形貌特征、电性能和电热行为。结果表明，碳纤维在N2环境下的涂层和烧结具有有效的保护作用，电热性能和力学性能得到了极大的提高。基于 24k 碳纤维和 1 cm 厚陶瓷烧结的复合材料在 6 V 下仅 10 分钟就达到了约 65°C，从 82°C 到室温的冷却过程持续了 30 分钟，呈现出高响应的加热和良好的温度存储性能. 单根石墨烯包覆碳纤维的拉伸强度和断裂伸长率分别提高了 12% 和 200%。改性碳纤维优异的电热特性和强大的机械性能使碳纤维/陶瓷复合材料成为室内温度控制和室外除冰应用的理想选择。单根石墨烯包覆碳纤维的拉伸强度和断裂伸长率分别提高了 12% 和 200%。改性碳纤维优异的电热特性和强大的机械性能使碳纤维/陶瓷复合材料成为室内温度控制和室外除冰应用的理想选择。单根石墨烯包覆碳纤维的拉伸强度和断裂伸长率分别提高了 12% 和 200%。改性碳纤维优异的电热特性和强大的机械性能使碳纤维/陶瓷复合材料成为室内温度控制和室外除冰应用的理想选择。