用于电热转换、电磁屏蔽的导电陶瓷的简易大规模制备  

Facile and Scalable Fabrication of Conductive Ceramic Composite for Energy Conversion and Electromagnetic Interference Shielding

作　　者：李岱祺 唐彬 程德山 吴静 唐文杨 赵仲 李建强 蔡光明 王金凤 王训该 Daiqi Li;Bin Tang;Deshan Cheng;Jing Wu;Wenyang Tang;Zhong Zhao;Jianqiang Li;Guangming Cai;Jinfeng Wang;Xungai Wang(State Key Laboratory of New Textile Materials and Advanced Processing Technologies,Wuhan Textile University,Wuhan 430200,China;Institute for Frontier Materials,Deakin University,Melbourne/Geelong,VIC 3216,Australia)

机构地区：[1]State Key Laboratory of New Textile Materials and Advanced Processing Technologies,Wuhan Textile University,Wuhan 430200,China [2]Institute for Frontier Materials,Deakin University,Melbourne/Geelong,VIC 3216,Australia

出　　处：《Engineering》2023年第2期143-151,M0006,共10页工程（英文）

基　　金：supported by grants from the National Natural Science Foundation of China(52078394)。

摘　　要：通过传统瓷砖制备工艺的干压法,制备了一种碳化酚醛树脂基导电陶瓷复合材料(CCC)。首先,将导电前驱体溶液(酚醛树脂)与陶瓷前驱体均匀混合,随后在单次热处理中同时实现了碳化和陶瓷化。碳化后的材料赋予复合材料出色的电导率和可靠的循环加热特性。在12 V电压下通电10 min后材料表面温度可达386℃,在20 V电压下达到400℃仅需48 s。红外热像图表明,热量在复合材料表明分布均匀,并且可以通过更改电路布置(串联或并联)来调节电热转换性能。此外,与普通陶瓷相比,导电陶瓷复合材料在8.2 GHz下表现出了26.2 dB的优异电磁屏蔽性能,并提升了光热转换性能。更重要的是,这种单次热处理加热生产导电陶瓷复合材料的方法成本较低,可在原有瓷砖生产线的基础上进行大规模生产。出色的电学性能促进了该陶瓷复合材料在焦耳加热中的应用(如除冰、烧水和烹饪)及电磁屏蔽领域的应用。A conductive ceramic composite(CCC)based on carbonized phenolic resin is fabricated via a facile and scalable dry-pressing method.A conductive carbonaceous precursor solution is homogeneously mixed with a ceramic precursor.Subsequently,carbonization and ceramicization are achieved simultaneously in a single heating process.The carbonized materials endow the composites with excellent electrical conductivity and reliable cyclic heating properties.The temperature of the obtained composites is approximately 386℃ at 12 V after 10 min and 400℃ at 20 V after 48 s,and their energy consumption is low.Thermal images show that an even heat distribution is achieved on the composite surface,and that the electro-thermal performance can be adjusted by changing the electrical circuit arrangement(series or parallel circuits).In addition,the ceramic composites exhibit favorable electromagnetic interference(EMI)shielding performance of 26.2 dB at 8.2 GHz and improved photothermal conversion effect compared with the pristine ceramic.More importantly,this single-step heating provides a convenient and cost-effective approach for producing CCCs,thereby enabling the scalable production of conductive ceramics for electro-thermal applications.The excellent electrical performance facilitates the application of ceramic composites in Joule heating(e.g.,deicing,boiling water,and cooking)and EMI shielding.

关 键 词：陶瓷复合材料 电学性能 电磁屏蔽 红外热像图 导电陶瓷 陶瓷前驱体 大规模制备 焦耳加热 

分 类 号：TQ174.7[化学工程—陶瓷工业]