Anomalous recoilless fraction of 30-A-diameter FeOOH particles

Journal Article · Mon Jan 31 23:00:00 EST 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.49.3036· OSTI ID:5255171

Ganguly, B; Huggins, F E; Feng, Z; Huffman, G P ^[1]

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1. Consortium For Fossil Fuel Liquefaction Science, 233 Mining and Mineral Resources Building, University of Kentucky, Lexington, Kentucky 40506 (United States)

Investigation of a 30-A iron oxyhydroxide catalyst by Moessbauer spectroscopy revealed that the recoilless fraction decreased dramatically with increasing temperature, becoming effectively zero at 50 K. This effect is explained on the basis of a combined effect of the recoil of the particle and the particle motion due to thermal agitation. The mean-square amplitude of particle motion is derived as a function of temperature. Application of uniaxial pressure to the sample or freezing the sample in carnuba wax increased the recoilless fraction markedly by enhancing the interparticle contact forces.

• DOE Contract Number: FC22-90PC90029
• OSTI ID: 5255171
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 49:5; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
CATALYSTS
HIGH PRESSURE
HYDROGEN COMPOUNDS
HYDROXIDES
IRON COMPOUNDS
IRON HYDROXIDES
MOESSBAUER EFFECT
OXYGEN COMPOUNDS
PRESSURE DEPENDENCE
RECOILLESS FRACTION
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TRANSITION ELEMENT COMPOUNDS