石墨烯/氧化锆复合材料的分散液工艺优化及润湿性能

Optimization parameter of the graphene dispersion and the wettability of graphene/ZrO2 ceramic composites

将石墨烯分散液浸渍到氧化锆基体中,利用微波烧结法制备石墨烯/氧化锆陶瓷复合材料,提高了氧化锆陶瓷的润湿性.首先,通过优化球磨机的工艺参数(球料比、转速、研磨时间),制备出粒径为200.3 nm的石墨烯分散液,然后通过X射线衍射仪(X-ray di raction,XRD)、Raman光谱仪、透射电子显微镜(transmission electron microscope,TEM)分析了石墨烯的微观结构,最后分析了石墨烯/氧化锆陶瓷复合材料的润湿性.结果表明,石墨烯分散液能够长时间存放,且具备较好的单层或少层片状结构,添加石墨烯能够明显提高氧化锆陶瓷的润湿性,使氧化锆陶瓷润湿角减小,表面能增加,润湿性能变好.

The wettability of ZrO2 ceramic was improved in the graphene/ZrO2 ceramic composites fabricated by impregnating graphene dispersion into ZrO2 ceramic sintered by micro wave.Firstly,the graphene dispersion was fabricated by ball milling,and the size of graphene with 200.3 nm was obtained after optimizing the process parameter of the ratio of ball,speed,time.Then,the structure of graphene was analyzed through X-ray diffraction(XRD),Raman spectrometer and transmission electron microscope(TEM),and the wettability of ceramic was also investigated.The results showed that the graphene dispersion remained steady for a long time with keeping a few layers.When adding the graphene to the ZrO2 ceramic,the wettability of ZrO2 ceramic was obviously improved because of its lower contact angle and higher surface energy.