Abstract
Unique properties of graphene open new opportunities for preparing composites with favorable functional capabilities. Herein, an ingenious synthesis route via re-pyrolysis process of ball-milling-induced SiC(rGO, Gx)p fillers/polycarbosilane-vinyltriethoxysilane-graphene oxide (PCS-VTES-GO, PVG) precursors blends is proposed to obtain structural-functional integrated SiC(rGO, Gx) bulk polymer-derived ceramics (PDCs). The introduction of SiC(rGO, Gx)p provides favorable moldability, ceramic yield and linear shrinkage. Attractively, graphene networks with more free-moving electrical-charge carriers and wider phonon-channel prominently enhance electrical and thermal conductivities of products. Particularly, SiC(rGO, G20%) bulk PDCs generated at 1300 °C own satisfactory ceramic yield (90.74%), linear shrinkage (5.00%), fracture toughness (2.07 MPa m1/2), bending strength (35.37 MPa), electrical conductivity (25.72 S cm−1) and thermal conductivity (6.72 W m−1·K−1), realizing outstanding values to the best of our knowledge. This fabrication method favors mass production of larger-sized PDCs and possess potential emerging uses.
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