Dense refractories with improved thermal shock resistance

Details Dense refractories with improved thermal shock resistance Dense refractories with improved thermal shock resistance

C - Chemistry, Metallurgy

04

B

261/27

C04B 35/00 (2006.01) C04B 35/443 (2006.01)

Patent

CA 2315398

The present invention discloses a dense refractory material, which includes a spinel matrix and a micro-crack initiating phase dispersed in the matrix. The micro-crack initiating material introduces micro-cracks into the refractory material, which inhibits catastrophic failure as a result of the effects of thermal shock. A method of manufacturing a dense refractory material which includes the steps of mixing precursor oxides for a spinel material, calcining the material, forming the spinel material into a green form of the product and firing the green form to produce the final form is also disclosed.

La présente invention décrit un matériau réfractaire dense qui comprend une matrice de spinelle et une phase d'initiation de micro-fissure dispersée dans la matrice. Le matériau d'initiation de la micro-fissure introduit des micro-fissures dans le matériau réfractaire ce qui inhibe toute défaillance catastrophique résultant des effets du choc thermique. L'invention concerne aussi un procédé de fabrication d'un matériau réfractaire dense qui comprend des étapes consistant à mélanger des oxydes précurseurs d'un matériau de spinelle, à calciner le matériau, à former le matériau de spinelle à l'état vert du produit et à cuire le matériau dans cet état pour obtenir le produit final.

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