Production process of a sintered high-toughness alumina-based co

Details Production process of a sintered high-toughness alumina-based co Production process of a sintered high-toughness alumina-based co

1993-11-18

1995-07-11

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501105, C04B 3510

Patent

active

054321336

ABSTRACT:
A sintered high-toughness alumina-based composite body comprises a plate- or rod-like, corundum or alumina-based compound structure and another structure having a fine granular corundum structure and containing inevitable impurities. A sintered high-toughness alumina-based composite can be produced by mixing a crystal-growth-promoting additive with a first portion of alumina powder to prepare a mix A, mixing a crystal-growth-inhibiting additive with a second portion of alumina powder to prepare a mix B, granulating at least one of the mix A and the mix B into granules, mixing the mix A and the mix B into a mix C, forming tile mix C into a green body, and then firing the green body, whereby crystals of the corundum or alumina-based compound in the mix A are allowed to grow.

REFERENCES:
patent: 4306909 (1981-12-01), Oda et al.
patent: 4316964 (1982-02-01), Lange
patent: 4430440 (1984-02-01), Wada et al.
patent: 4892850 (1990-01-01), Hori
patent: 5134100 (1992-07-01), Freudenberg et al.
patent: 5135896 (1992-08-01), Vezza
patent: 5204300 (1993-04-01), Kumagai et al.

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