Influence of the polymer architecture on the high temperature behavior of SiCO glasses: A comparison between linear- and cyclic-derived precursors

Enhanced hydrogen and methane gas storage of silicon oxycarbide derived carbon

“…Polymer architecture, the functionality of side groups, and the degree of cross-linking must be considered for complete understanding of the PDC microstructure [34]. Accordingly, our XRD, Raman, and TEM investigations are consistent with an amorphous SiOC ceramic containing nanosized graphitic carbon and SiC.…”

“…PMS derived SiOC is supposed to have smaller interconnected silica domains and/or more amorphous (less phase separated) structure. In this perspective, Dibandjo et al [49] studied the effect of polymer architecture and showed that HF etching of SiOC with a high carbon content did not yield a nanoporous structure, when the ceramic was pyrolyzed at 1200°C. This finding implied that the matrix was not yet phase separated, that means no interconnectivity between the silica-rich domains, most probably because of the free carbon phase, which plays an important role in the stability of the amorphous phase [5,50].…”

Thermal degradation of polymethylsilsesquioxane and microstructure of the derived glasses

“…The observation of the filaments suggests that in the field of glass technology, Si-O-C glasses produced by pyrolysis of polysiloxanes receives attention not only for its exceptional high-temperature strength and chemical stability compared to vitreous silica [1][2][3]. The controlled processing of flexible Si-O-C fibers at the glass surface can lead to the development of the innovative coatings exhibiting adaptive properties under the temperature or pressure variations.…”

“…This makes these materials attractive for high-temperature applications [1][2][3]. Although there has been substantial progress over the past 25 years in developing a better understanding of the pyrolysis behavior of PMS, but still considerable work needs to be done.…”

High Rate Capability of SiOC Ceramic Aerogels with Tailored Porosity as Anode Materials for Li-ion Batteries

“…Silicon oxycarbides are ceramic structures with silicon bonded to both oxygen and carbon simultaneously. The structure of SiOC beside the amorphous silicon oxycarbide network -in which Si atoms share bonds with O and C atoms simultaneously-contains an interconnected disordered free carbon phase which accounts for many of their excellent mechanical and electrochemical properties [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44]. It came out from our previous studies on SiOC and SiCN ceramic materials [32,52] that free carbon content is an important factor determining reversible Li storage capacity and cycling stability.…”