The Fabrication And Characterization Of SiCN Nano-fiber Ceramic Materials By Electrospinning

Electrospinning technology is one of main methods for prepareing nanofiber. Recently, a growing number of researchers are engaging in synthesizing the ceramic materials using this method. The ceramic materials possess many excellent qualities, such as, light weight, good thermal stability, resistant high temperature, low conductivitym, and so on. They have been applied in the petroleum, chemical, metallurgy, ceramics and other areas. Therefore, the investigations of the ceramic materials are very important.Although there are many methods of fabricating nanofibres, electrospinning is perhaps the most versatile process. Materials such as polymer, composites, ceramic and metal nanofibres have been fabricated using electrospinning directly or calcined under high temperature. Electrospinning has been recognized as an efficient technique for the fabrication of polymer nanofibers. Various polymers have been successfully electrospun into ultrafine fibers in recent years mostly in solvent solution and some in melt form.In this paper, employing the electrospinning technology, a series of nanofiber materials are synthesized by different molar ratios of polysilazane and polyvinylpyrrolidone (PVP), and also, they are calcined to be a series of SiCN ceramic materials under hightemperature (1100 oC). The ceramic samples were characterized by IR, XRD and XPS. The investigations indicate that the main elements in the samples are Si, C, N and O, and also, the samples are amorphous. Because of the different molar ratios of the materials, the investigations reperesent that there are mainly the Si-C, C-N, Si-N, C=C and O-H bonds in sample 1; Si-C, C-N, Si-N and O-H bonds in sample 2; C-N, Si-N and O-H bonds in sample 3; C-N, Si-N and O-H bonds in sample 4. Furthermore, the morphology of the SiCN ceramic materials are studied by the scanning electron microscopy technology.