References of "Scheffler, Michael"
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See detailFibrous natural materials for ceramic processing
Gaydardzhiev, Stoyan ULg; Wilker, Viola; Scheffler, Michael

in Zuo, Wang (Ed.) Proceedings of the XXIV International Mineral Processing Congress (2008, September)

Initial experiments towards preparation of hollow ceramic microtubes by dip-coating of fibrous plants with water based alumina gel-casting slurries using hemp and coconut fibres as templates have been ... [more ▼]

Initial experiments towards preparation of hollow ceramic microtubes by dip-coating of fibrous plants with water based alumina gel-casting slurries using hemp and coconut fibres as templates have been done. It has been found that the wettability of fibres and accordingly the stability of the developed ceramic layer on their surface during slurry gelation varied significantly within the different fibre types. Good correlation between the diameters of the template fibres and the resulting channels has been found at the 31 % solids loadings level. Hemp fibres used as bundles have led to formation of multi channel patterns while the coconut fibres-templated process resulted in uniform monochannel materials. The micro tubes have shown good mechanical handling properties. [less ▲]

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Full Text
Peer Reviewed
See detailDip-coating of fibrous natural materials for alumina tube manufacturing
Gaydardzhiev, Stoyan ULg; Wilker, Viola; Scheffler, Michael

in Advanced Engineering Materials (2008), 10(3), 223-226

Results from preliminary studies for development of hollow ceramic tubes by dip-coating of fibrous plants with water based gel-casting slurries are presented. Hemp and coconut fibres have been tested as ... [more ▼]

Results from preliminary studies for development of hollow ceramic tubes by dip-coating of fibrous plants with water based gel-casting slurries are presented. Hemp and coconut fibres have been tested as templates reflecting in different macro and micro structures of the obtained ceramic tubes. Good correlation between the diameters of the template fibres and the developed channels has been documented, the ordering of the channels inside the tubes being function of the mode of fibres implementation: as singles or as bundles. By coating hemp fibres in bundle, multi channel pattern has been developed, resulting from splitting of the bundle. By using single coconut fibre as template, uniform mono channels with 250 – 400 µm in diameter were observed. The developed tubes have been characterized by good end finish. The observed differences in their microstructure offer possibilities for adjusting the physical properties towards prospective application niches. [less ▲]

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