liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • 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
Thermal treatment and phase formation in kaolinite and illite based clays from tropical regions of Bolivia
Division of Materials Science, Luleå University of Technology.
Division of Materials Science, Luleå University of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Nanostructured Materials. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-2286-5588
2012 (English)Conference paper, Published paper (Refereed)
Abstract [en]

The aim of this study was to compare the thermal behaviour of clays containing illite and kaolinite in various proportions. The clays contained small amounts of K and Fe, which act as fluxing agents. In order to investigate the phase formations during heating, the samples were examined in a differential scanning calorimeter at temperatures up to 1300°C. The thermal expansion of the samples was determined by dilatometer measurements from room temperature up to 1150°C. Phases were identified using x-ray diffraction and scanning electron microscopy.

In all samples, most of the kaolinite was transformed into metakaolinite during heating up to 650°C, while illite remained unchanged up to 950°C. There was no influence of K and Fe on dehydroxylation. Metakaolinite formed at temperatures above 950°C leading to a Si-Al spinel. Furthermore, mullite was formed in the temperature interval 1050-1150°C. In this temperature range, the mechanism of mullite formation depended on the amount of K and Fe in the samples, changing the temperature of formation of mullite. It was observed by x-ray diffraction that most of the illite was transformed into a Si-Al spinel phase at 1050°C, and during further heating transformed into mullite. An increased amount of illite in the clays slightly decreased the melting temperature. The dilatometer measurements showed expansion and shrinkage for the dehydroxylation and spinel-phase formation, respectively.

Place, publisher, year, edition, pages
Bristol, UK: Institute of Physics Publishing (IOPP), 2012. 012017-012026 p.
Series
IOP Conference Series-Materials Science and Engineering, ISSN 1757-8981 ; Vol. 31
National Category
Manufacturing, Surface and Joining Technology
Identifiers
URN: urn:nbn:se:liu:diva-78691DOI: 10.1088/1757-899X/31/1/012017ISI: 000306212500017OAI: oai:DiVA.org:liu-78691DiVA: diva2:534754
Conference
6th EEIGM International Conference on Advanced Materials Research, 7-8 November 2011, Nancy - France
Available from: 2012-06-18 Created: 2012-06-18 Last updated: 2013-10-02Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Authority records BETA

Odén, Magnus

Search in DiVA

By author/editor
Odén, Magnus
By organisation
Nanostructured MaterialsThe Institute of Technology
Manufacturing, Surface and Joining Technology

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 84 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • 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