Magnetic characterization of calcium-nickel-potassium oxide catalysts

Journal Article · Tue Nov 01 04:00:00 EST 1994 · Journal of Materials Research; (United States)

DOI:https://doi.org/10.1557/JMR.1994.2993· OSTI ID:6894148

Perry, D L; Berdahl, P; Perrino, C ^[1]

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1. Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)

SQUID magnetometer characterization of Ca--Ni--K--O catalyst materials reveals complex magnetic behavior. The magnetic properties are generally determined by the antiferromagnetic material NiO, but samples with traces of elemental nickel show marked effects of ferromagnetism. Potassium doping enhances the formation of metallic nickel. Further deviations from bulk NiO properties can be attributed to NiO particle size effects (superparamagnetism) and to the presence of paramagnetic impurities, possibly Ni[sup 3+] ions.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6894148
• Journal Information: Journal of Materials Research; (United States), Journal Name: Journal of Materials Research; (United States) Vol. 9:11; ISSN JMREEE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ANTIFERROMAGNETISM
CALCIUM COMPOUNDS
CALCIUM OXIDES
CATALYSTS
CHALCOGENIDES
ELECTRONIC EQUIPMENT
EQUIPMENT
FERROMAGNETISM
FLUXMETERS
IMPURITIES
MAGNETIC PROPERTIES
MAGNETISM
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
NICKEL COMPOUNDS
NICKEL OXIDES
OXIDES
OXYGEN COMPOUNDS
PARAMAGNETISM
PHYSICAL PROPERTIES
POTASSIUM COMPOUNDS
POTASSIUM OXIDES
SQUID DEVICES
SUPERCONDUCTING DEVICES
TRANSITION ELEMENT COMPOUNDS