Ceramic bodies formed from yttria stabilized zirconia-alumina

Details Ceramic bodies formed from yttria stabilized zirconia-alumina Ceramic bodies formed from yttria stabilized zirconia-alumina

C - Chemistry, Metallurgy

04

B

182/120, 25/125,

C04B 38/06 (2006.01) B01D 39/20 (2006.01) C04B 35/10 (2006.01) C04B 35/48 (2006.01) C04B 35/488 (2006.01) C04B 35/80 (2006.01) C04B 38/00 (2006.01) C04B 41/87 (2006.01) C22B 9/05 (2006.01)

Patent

CA 2036558

89-357 ABSTRACT OF THE DISCLOSURE Ceramic bodies suitable for use in the filtration of molten metal are formed by immersing a porous organic substrate material in an aqueous thixotropic slurry containing yttria, zirconia and alumina, expelling excess slurry: drying the impregnated material; and heating to an elevated temperature to burn off the organic material and sinter the ceramic materials. The resulting zirconia-alumina ceramic bodies have from about 5-80% of the zirconia in a monoclinic phase and the remainder of the zirconia essentially in a stabilized cubic phase due to the yttria. The ceramic bodies thus produced have excellent strength, density, and thermal shock resistance properties. -28-

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