University of Pennsylvania

W. R. Grace Co.-conn.

Electric Power Research Institute Incorporated

Takeshi Egami

Philip J Flanders

Charles D Graham

Rasto Brezny

Manoj M Koranne

Eugene Mamontov

Shinichiro Hatta

Mixed oxides of cerium oxide and zirconium oxides having a high oxygen storage and high oxygen release rate are disclosed. The mixed oxides are made of polycrystalline particles of cerium oxide and zirconium oxide having a controlled domain structure on the subcrystalline level wherein adjacent domains within a single crystallite have a different ratio of zirconium and cerium. The mixed oxides are prepared by a co-precipitation technique using mixed salt solutions of cerium and zirconium having a solid content of at least 23%, based on an oxide basis.

Catalyst support material having high oxygen storage capacity and method of preparation thereof

An amorphous alloy including iron, carbon and boron characterized by exceptional magnetic induction properties at room temperature, rendering it particularly suitable for use as the core of a power transformer. The alloy includes 83 to 90 atomic % iron, 2 to 13 atomic % carbon, and 4 to 15 atomic % boron, the total boron and carbon content ranging from 10 to 17 atomic %. If desired, up to 10% of the iron can be replaced by cobalt or nickel, while up to 2% of the carbon can be replaced by silicon or germanium.

Amorphous alloy with high magnetic induction at room temperature

A nickel based amorphous alloy in elongated ribbon form is subjected to a stress in the range of 20 to 40 kilograms per square millimeter, and is heated to temperatures below the melting point, preferably in the range of 200.degree. C. Such heating under stress is maintained for a period of time, whereupon the material is cooled. There results a residual enhancement of the magnetic properties which occur by application of stress, but which are extinguished when the stress is removed.

Enhancing magnetic properties of amorphous alloys by annealing under

A nickel based amorphous alloy in elongated ribbon form is passed between two rollers to obtain approximately a one third reduction in thickness. The rolled alloy samples may then be subjected to elastic tensile loading, which tends to increase remanence and decrease coercivity. The rolling process tends to reduce the unloaded remanence and thereby to improve the load versus remanence range sensitivity by a considerable amount.

Enhancing magnetic properties of amorphous alloys by rolling

The magnetic properties of amorphous metallic alloys are improved significantly by application of stress to the alloy material. Selected alloys in ribbon form are subjected to controlled tensile stress, whereupon resulting magnetic properties are superior to corresponding conventional crystalline materials. So stressed, the amorphous alloy material may be applied to advantage as transformer cores, magnetic delay lines, magnetic computer cores, and the like.

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Takeshi Egami