Effect of synthesis parameters of carbon-carbon nanoporous composites in the form of compact bodies with various geometric shapes on their structure and properties was studied. The synthesis process includes three technological stages: molding of blanks with prescribed size and shape powdered Ti, Si, B, Mo, etc. carbides, their thermal treatment with methane to give a carbide-pyrocarbon composite, thermochemical treatment of the composite with chlorine to give the final material, carbon-carbon nanoporous composite in which nanoporous carbon is a filler, and pyrocarbon, a binder. It is shown that the ratio between the carbide phases and pyrocarbon, compaction pressure, and temperature of chlorination of the chemical composition of carbide affect the properties of the composite. The carbon-carbon composites synthesized contain nanopores 0.7–3 nm in size and micropores and have a large specific surface area (up to 1000 m2 g–1). The volume of the nanopores in the composites varies within the range 0.42–0.79 cm3 g–1.
Russian Journal of Applied Chemistry – Springer Journals
Published: Sep 30, 2015
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