CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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
Porous alumina ceramics by gel casting: Effect of type of sacrificial template on the properties
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0002-6702-4627
Akzo Nobel Pulp and Performance Chemicals AB, Expancel, Sundsvall, Sweden.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-4888-6237
2019 (English)In: International Journal of Ceramic Engineering & Science, ISSN 2578-3270Article in journal (Refereed) Epub ahead of print
Abstract [en]

The effect of type of sacrificial template on the processing and properties of porous alumina ceramics was investigated. Two templates, (a) hollow pre‐expanded polymer spheres (Expancel) and (b) dense glassy carbon, were used to prepare porous alumina ceramics by gel casting. The results showed that the burnout of sacrificial expandable polymer microspheres from alumina ceramics was 10 times faster than glassy carbon without compromising the compressive strength. Moreover, the effect of the size of the porous ceramic component during the burnout showed that the template decomposition and the escape of the formed gases took a longer time for the thicker specimens than the thinner one and it was significant in case of glassy carbon. It was found that the burnout of expandable microspheres could happen at a faster rate, and the time of the burnout cycle could be reduced significantly to save energy while keeping the mechanical strength twice as high than porous alumina ceramics after burnout of glassy carbon. Furthermore, the CO2 emissions during the burnout of sacrificial templates and the microstructure of the prepared porous alumina were compared for these two types of sacrificial templates. The prepared foams with pre‐expanded microspheres showed potential for being used in industrial applications, where the decreasing of the released gases is critical for saving time and energy for the fabrication of large ceramic parts.

Place, publisher, year, edition, pages
American Ceramic Society, 2019.
Keywords [en]
alumina, ceramic foam, gelcasting, mechanical properties, porous materials, sacrifical template
National Category
Ceramics Other Materials Engineering
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-75193DOI: 10.1002/ces2.10013OAI: oai:DiVA.org:ltu-75193DiVA, id: diva2:1334345
Funder
Swedish Foundation for Strategic Research , RIF14-0083Available from: 2019-07-02 Created: 2019-07-02 Last updated: 2019-07-05

Open Access in DiVA

fulltext(954 kB)29 downloads
File information
File name FULLTEXT01.pdfFile size 954 kBChecksum SHA-512
35f0b2a196e573c30c2d99eabe359c72c1bb7e8d9c6f169fcd09629cb43e5eda85135105e81d07fbecf6e48a7971b5b9c2c2ac98d12b8e330ff5746b2493adf5
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Authority records BETA

Hooshmand, SalehAkhtar, Farid

Search in DiVA

By author/editor
Hooshmand, SalehAkhtar, Farid
By organisation
Material Science
CeramicsOther Materials Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 29 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 21 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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