Ceramic composite containing a spinel phase and an oxide phase a

Details Ceramic composite containing a spinel phase and an oxide phase a Ceramic composite containing a spinel phase and an oxide phase a

1994-05-26

1996-01-09

Bonner, C. Melissa

Compositions: ceramic

Ceramic compositions

Refractory

501126, 501127, 501132, 501153, C04B 35443, C04B 35117, C04B 3512, C04B 3526

Patent

active

054829070

ABSTRACT:
A ceramic composite contains one spinel phase and one or more than one oxides phases. The composite is derived from the mixtures of two oxides, A.sub.2 O.sub.3 and BO, with different molar ratio, in which A and B are metallic ions of three and two valences respectively. The oxides are heated at a high temperature to form a composite containing a spinel and residual oxides. The formed spinel and residual oxides also undergo densification under high temperature. After the treatment at high temperature, not only the spinel is formed but also the composite is densified. The performance of the composite is superior in its strength, toughness and high-temperature stability.

REFERENCES:
patent: 2492543 (1949-12-01), Verwey
patent: 4348485 (1982-09-01), Oohasi et al.
patent: 4400431 (1983-08-01), Henslee et al.

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