Fused zirconia refractory materials having high-temperature heat

Details Fused zirconia refractory materials having high-temperature heat Fused zirconia refractory materials having high-temperature heat

1991-06-06

1993-01-05

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501104, C04B 3548

Patent

active

051770407

ABSTRACT:
Fused zirconia refractory materials having high-temperature resistance and corrosion resistance which includes 1-14 30 wt % of calcia and 0.05-2 wt % of yttria or rare earth minerals including yttria as a stabilizer of zirconia, which are produced by the process comprising adding and mixing calcia and yttria or rare earth minerals including yttria to zirconia materials as a stabilizer, fusing the mixed materials in an electric arc furnace, cooling slowly the fused materials to obtain an ingot, crushing the ingot to particles and oxidizing and annealing the particles.

REFERENCES:
patent: 3620781 (1971-11-01), Garvie
patent: 4294795 (1981-10-01), Haga et al.
patent: 4975397 (1990-12-01), Dvorah et al.

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