Yttria containing high-density chrome based refractory...

Details Yttria containing high-density chrome based refractory... Yttria containing high-density chrome based refractory...

2007-06-19

2007-06-19

Group, Karl (Department: 1755)

Compositions: ceramic

Ceramic compositions

Refractory

C501S152000

Reexamination Certificate

active

10964671

ABSTRACT:
The invention presents yttria elements containing high-density chrome based refractory composites, which consist of: (A) Fused polymeric compound as aggregate, containing: 40 to 50 wt % of particles in size from 1 to 4 mm and 15 to 25 wt % of particles in size below 1 mm; (B) A matrix consisting of fused polymeric compounds with particle sizes below 66 μm, active sintered Al2O3, active industrial Cr2O3and Y2O3, (C) Binders accounting for 2.5 to 3.5 wt %. Since Y2O3has resistance to the slag corrosion and penetration with its compatibility with slag, it has been introduced to activate the major component Cr2O3crystal lattice in favor with Al2O3so that it helps to reduce the sintering temperature, increase the rate of finished products as well as reduce the manufacturing cost.

REFERENCES:
patent: 5827791 (1998-10-01), Pauliny et al.

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