Refractory, method for manufacturing refractory, and...

C - Chemistry – Metallurgy – 04 – B

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C04B 35/00 (2006.01)

Patent

CA 2602882

A carbon-containing refractory is provided, which can improve the thermal shock resistance, the abrasion resistance, and the corrosion resistance without degrading the oxidation resistance. In a carbon-containing refractory composed of a refractory aggregate, a carbon based raw material, and a carbon bond connecting between the refractory aggregate or the carbon based raw material, transition metal-containing nanoparticles having particle diameters of 1,000 nm or less and containing a transition metal are contained in the above-described carbon bond while being dispersed. When the carbon-containing refractory is heat-treated, flexible structures of carbon fiber-shaped textures having diameters of 50 nm or less are formed in the inside of a carbon bond and, thereby, an increase in strength, a reduction in modulus of elasticity, and a reduction in thermal expansion coefficient are facilitated. Therefore, a carbon-containing refractory exhibiting high thermal shock resistance, high abrasion resistance, and high corrosion resistance are provided.

L~invention concerne un réfractaire contenant du carbone capable d~améliorer la résistance aux chocs thermiques, la résistance à l~abrasion et la résistance à la corrosion sans réduire la résistance à l~oxydation. Elle porte sur un matériau réfractaire contenant du carbone qui est composé d~un agrégat réfractaire, d~un matériau carboné et d~une liaison de carbone permettant de lier les particules de l~agrégat réfractaire ou du matériau carboné, la liaison de carbone contenant des nanoparticules dispersées dans celle-ci, contenant un métal de transition et ayant un diamètre particulaire inférieur ou égal à 1000 nm. Le traitement thermique du matériau réfractaire contenant du carbone forme une structure souple de type fibre de carbone ayant un diamètre inférieur ou égal à 50 nm dans la liaison de carbone, avec pour conséquence la formation d~un article de plus grande résistance, de module élastique réduit et d~un coefficient plus faible d~expansion thermique, conduisant à la production d~un produit réfractaire contenant du carbone ayant une résistance élevée aux chocs thermiques, à l~abrasion et à la corrosion.

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