Preparation of graphite modified PDC-SiCNO ceramics and its dielectric properties

• Main Authors: YU Yu-xi, XIA Fan-sen, HUANG Qi-fan
• Format: Article
• Language: zho
• Published: Journal of Materials Engineering 2019-03-01
• Series: Journal of Materials Engineering
• Subjects: polymer derived ceramic(PDC); graphene; dielectrical performance; preparation
• Online Access: http://jme.biam.ac.cn/CN/Y2019/V47/I3/8

Graphene ball reinforced SiCNO ceramics (SiCNO-GO) were prepared by using polyvinylsi-lazane (PVSZ) as raw material and graphene oxide (GO) as carbon source and anhydrous ethanol (ETOH) as dispersant. X-ray diffraction (XRD), Raman spectroscopy (Raman), electron spin resonance (EPR) and SEM were used to study the effect of SiCNO-GO ceramics on the dielectric properties. The results show that the microsphere density and particle size of SiCNO-GO ceramics are related to the content of GO. With the increase of GO content in SiCNO-GO ceramics, the dielectric constant and dielectric loss of SiCNO-GO ceramics also increase, reach the maximum value when the GO mass fraction is 0.1%. When the GO mass fraction is 0.3%, the dielectric constant and dielectric loss of the SiCNO-GO ceramics decrease.