Refractories with a high content of alumina and the process for

Details Refractories with a high content of alumina and the process for Refractories with a high content of alumina and the process for

1985-06-12

1987-06-02

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 96, 501 98, C04B 3510, C04B 3556, C04B 3558

Patent

active

046704078

ABSTRACT:
The invention relates to new refractories with a high content of alumina and the process for their production. The refractories are made up of alumina particles held by a binder capable of withstanding a reducing atmosphere at 850.degree. C. The refractories are characterized by low porosity and high mechanical strength and are also inert towards coal ashes and slags at these temperatures. The binder used in the refractories consists of a combination of aluminum nitride and aluminum oxycarbide. The carbon required to the formation of the carbon oxide may be introduced in a form of carbon black or graphite, or may originate from a decomposition of a provisional or organic binder.

REFERENCES:
patent: 2599185 (1952-06-01), Lepp et al.
patent: 2922213 (1960-01-01), Bollack et al.
patent: 4341533 (1982-07-01), Daire et al.
Chemical Abstracts vol. 73, No. 18076w.

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