Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Isothermal dynamic thermal diffusivity studies of the reduction of NiO and NiWO4 precursors by hydrogen
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
Kungliga tekniska högskolan, KTH.
2011 (English)In: International Journal of Materials Research - Zeitschrift für Metallkunde, ISSN 1862-5282, E-ISSN 2195-8556, Vol. 102, no 11, 1336-1344 p.Article in journal (Refereed) Published
Abstract [en]

Thermal diffusivity measurements of uniaxially cold pressed NiO and NiWO4 were carried out in a dynamic mode in order to monitor the kinetics of hydrogen reduction of the above-mentioned materials using a laser flash unit. The calculated activation energy was found to be higher than that for chemically-controlled reaction obtained earlier by thermogravimetry. The difference has been attributed to physical changes occurring along with the chemical reaction. The activation energy of sintering of the products was evaluated to be 33 and 36 kJ mol-1 for NiO and NiWO4, respectively. Thermal conductivities were calculated taking into consideration the change in heat capacity considering the compositional and the structural changes with the progress of the reaction. The potentiality of the laser-flash method as a complementary technique to thermogravimetry in understanding the mechanism of gas-solid reactions is discussed.

Place, publisher, year, edition, pages
2011. Vol. 102, no 11, 1336-1344 p.
National Category
Metallurgy and Metallic Materials
Research subject
Process Metallurgy
Identifiers
URN: urn:nbn:se:ltu:diva-8627DOI: 10.3139/146.110591Local ID: 725a122b-6c0b-488a-b024-46263debc15cOAI: oai:DiVA.org:ltu-8627DiVA: diva2:981565
Note
Validerad; 2011; 20111209 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-10-19Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full texthttp://www.ijmr.de/directlink.asp?MK110591

Search in DiVA

By author/editor
Ahmed, Hesham
By organisation
Sustainable Process Engineering
In the same journal
International Journal of Materials Research - Zeitschrift für Metallkunde
Metallurgy and Metallic Materials

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 34 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf