Research progress in SiOC ceramics derived from hetero element-modified polysiloxane

Abstract

Polymer derived ceramics (PDCs) process has been one of the predominant fabrication technologies for ceramic materials. As a desirable raw material for the preparation of ceramics with high performance-to-cost ratio, polysiloxane (PSO) derived SiOC ceramics have been well developed. The SiOC ceramics derived from hetero element-modified PSO are the research hotspot of PDCs technology in recent years because the thermal stability can be enhanced and the functional properties can be expanded by the incorporation of hetero element. In this paper, microstructure of SiOC ceramics was introduced first, and then the current status of hetero element-modified PSO derived SiOC ceramics was reviewed from the viewpoints of improving thermal stability and expanding functional properties, respectively. In subsequent study, two key problems which should be paid much attention are to elucidate the operation mechanism of hetero element based on the evolution of atom local chemical environment and to enhance the application of modified SiOC ceramics.

Keywords

• silicon oxycarbide ceramics
• polysiloxane
• hetero element
• modification