Thermodynamic consideration and experimental study on preparation of hollow nickel fibres
2008 (English)In: International Journal of Materials Research, ISSN 1862-5282, Vol. 99, no 9, 1023-1031 p.Article in journal (Refereed) Published
In the present work, heat-treated hollow nickel fibres were prepared by thermal decomposition from nickel viscose composite. The thermodynamic properties of viscose fibre, namely standard enthalpy of formation, heat capacity, absolute entropy, and standard Gibbs free energy of formation were estimated by bond enthalpy. Thermodynamic analysis showed that viscose fibres could decompose at any reachable temperature, when the kinetic conditions were favourable. The results of thermogravimetric analysis experiments indicated that viscose filling could be removed by heat treatment in air. The thermogravimetric analysis results along with X-ray diffraction, scanning electron microscopy and X-ray energy dispersive spectrum analysis showed that hollow nickel fibre could be prepared by direct thermal decomposition in air flow at low temperatures, e.g. 573 K. Decomposition of the viscose filling could also be carried out at higher temperatures. However, serious oxidation of nickel would also take place during the decomposition. To remove nickel oxide, reduction by hydrogen gas could be applied.
Place, publisher, year, edition, pages
2008. Vol. 99, no 9, 1023-1031 p.
Bond enthalpy method; Hollow nickel fibre; Thermal decomposition; Decomposition; Enthalpy; Fibers; Gravimetric analysis; Hydrogen; Light; Microscopic examination; Nanostructured materials; Nickel; Nickel alloys; Nickel oxide; Photoresists; Pyrolysis; Reaction kinetics; Spectrum analyzers; Thermoanalysis; Thermodynamic properties; Thermodynamics; X ray diffraction analysis; Absolute entropies; Air flows; Bond enthalpy method; Direct thermal decompositions; Energy dispersive; Experimental studies; Gibbs free energy of formations; Heat capacities; Higher temperatures; Hollow nickel fibre; Hydrogen gases; Kinetic conditions; Low temperatures; Standard enthalpy of formations; Thermal decomposition; Thermal decompositions; Thermodynamic analysis; X-ray diffractions
IdentifiersURN: urn:nbn:se:kth:diva-7426DOI: 10.3139/146.101726ISI: 000259966100014ScopusID: 2-s2.0-54249091080OAI: oai:DiVA.org:kth-7426DiVA: diva2:12450
QC 20100804. Uppdaterad från In press till Published 20100804.2007-08-312007-08-312011-10-03Bibliographically approved