US 6,982,233 B2
Fire refractory ceramic molded piece, use thereof and composition for production of molded pieces
Bernd Buchberger, Trofaiach (Austria); Markus Horn, Lich (Germany); and Roland Nilica, Leoben (Austria)
Assigned to Refractory Intellectual Property GmbH & Co., (Austria)
Appl. No. 10/477,869
PCT Filed Nov. 08, 2002, PCT No. PCT/EP02/12489
§ 371(c)(1), (2), (4) Date Nov. 12, 2003,
PCT Pub. No. WO03/053879, PCT Pub. Date Jul. 03, 2003.
Claims priority of application No. 101 60 366 (DE), filed on Dec. 08, 2001.
Prior Publication US 2004/0142812 A1, Jul. 22, 2004
Int. Cl. C04B 35/047 (2006.01); C04B 35/443 (2006.01); C04B 35/106 (2006.01)
U.S. Cl. 501—120 20 Claims
 
1. A fired refractory ceramic molded piece with a spinel matrix comprising particles based on (Mg)2+ (Al, Cr)23+O4, in which particles based on chromium corundum and/or corundum and particles based on ZrO2 are present, all said particles based on chromium corundum, corundum and ZrO2 being coarser than the particles of the spinel matrix.