Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention discloses a low-carbon magnesia refractory material which is prepared from the following raw materials in parts by weight: 1-2 parts of pine needle powder, 70-76 parts of fused magnesite, 31-40 parts of flake graphite, 0.4-1 part of tea saponin, 3-4 parts of boron nitride, 4-8 parts of phenolic resin, 0.7-2 parts of propenol, 1-2 parts of terephthalic acid, 0.1-0.2 part of zinc cyanurate, 10-12 parts of sisal fiber, 26-30 parts of ethyl orthosilicate, 3-4 parts of 10-13 mol/L nitric acid solution, 2-3 parts of glacial acetic acid and 4-5 parts of aluminum oxide. The method comprises the following steps: hydrolyzing the ethyl orthosilicate into a silanol sol by using the glacial acetic acid as a catalyst, mixing the silanol sol and a fiber emulsion, evaporating the solvent to obtain a carbon-silicon-containing heterocomplex, and finally, carrying out high-temperature carbonization by providing a carbon source with the fiber emulsion to obtain the carbon-silicon composite assistant. The carbon-silicon composite assistant has the advantages of stable chemical properties, high heat conductivity coefficient, small thermal expansion coefficient, heat shock resistance, light weight and high strength.
The invention discloses a low-carbon magnesia refractory material which is prepared from the following raw materials in parts by weight: 1-2 parts of pine needle powder, 70-76 parts of fused magnesite, 31-40 parts of flake graphite, 0.4-1 part of tea saponin, 3-4 parts of boron nitride, 4-8 parts of phenolic resin, 0.7-2 parts of propenol, 1-2 parts of terephthalic acid, 0.1-0.2 part of zinc cyanurate, 10-12 parts of sisal fiber, 26-30 parts of ethyl orthosilicate, 3-4 parts of 10-13 mol/L nitric acid solution, 2-3 parts of glacial acetic acid and 4-5 parts of aluminum oxide. The method comprises the following steps: hydrolyzing the ethyl orthosilicate into a silanol sol by using the glacial acetic acid as a catalyst, mixing the silanol sol and a fiber emulsion, evaporating the solvent to obtain a carbon-silicon-containing heterocomplex, and finally, carrying out high-temperature carbonization by providing a carbon source with the fiber emulsion to obtain the carbon-silicon composite assistant. The carbon-silicon composite assistant has the advantages of stable chemical properties, high heat conductivity coefficient, small thermal expansion coefficient, heat shock resistance, light weight and high strength.
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