导电纤维的制备及在防静电陶瓷中的应用

Preparation of Conductive Fiber and Its Application in Antistatic Ceramics

摘要:

以氧化硅玻璃纤维为载体，采用非均匀成核法在其表面包覆一层锑掺杂二氧化锡（ATO）制备了导电纤维。导电纤维的电阻率随热处理温度升高的变化趋势与ATO基本一致，包覆物加入率为100%、75%、50%、25%和12.5%的ATO包覆氧化硅纤维在500~1200 ℃处理后的电阻率全部低于200 Ω·cm。由于较大的长径比所导致的桥联效应，少量的导电纤维在陶瓷中就能形成完善的导电网络，同时也能极大减少防静电陶瓷中ATO的用量，包覆物加入率为12.5%的ATO包覆纤维作为导电填料时，能节省约77.8%的ATO。

Abstract:

Conductive fiber was prepared by coating antimony-doped tin oxide (ATO) on silicon dioxide glass fiber using a heterogeneous nucleation method. The varying trend of resistivity with the calcination temperature of the ATO-coated silicon dioxide fiber was almost the same as that of the pure ATO. The resistivities of the ATO-coated silicon dioxide fibers with the coating amounts of 100%, 75%, 50%, 25%, and 12.5% and treated at 500-1200 oC were all below 200 Ω·cm. As the conductive additive, the ATO-coated silicon dioxide fiber can maximally save the ATO amount because of the bridge effect resulting from its high aspect ratio, which makes it possible to form a more completed conductive net in the ceramics for a small quantity of conductive fibers. For instance, about 77.8% of ATO amount can be saved when the ATO-coated silicon dioxide fibers with 12.5% coating material are used as conductive filler.