Chromic oxide refractories with improved thermal shock resistanc

Details Chromic oxide refractories with improved thermal shock resistanc Chromic oxide refractories with improved thermal shock resistanc

1989-05-26

1992-04-21

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

501132, C04B 3512

Patent

active

051067951

ABSTRACT:
Refractory compositions comprising at least eighty percent or more by weight Cr.sub.2 O.sub.3 densified by the addition of at least one-half percent and preferably about four percent TiO.sub.2 have about one-quarter percent to about fifteen percent by weight relatively finely divided monoclinic zirconia particles substantially uniformly dispersed therethrough to induce microcracks in the densified chromic oxide and improve thermal shock damage resistance of the refractory. Zirconia additions of up to at least five percent by weight exhibit the high glass corrosion resistance of similar densified chromic oxide compositions without zirconia.

REFERENCES:
patent: 2498622 (1950-02-01), Mochel
patent: 3773531 (1973-11-01), Manigault
patent: 4054627 (1977-10-01), Ownby
patent: 4298385 (1981-11-01), Claussen et al.
patent: 4374897 (1983-02-01), Yamaguchi
patent: 4533647 (1985-08-01), Tien
patent: 4647547 (1987-03-01), Singh et al.

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