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Tailoring of free standing microchannel structures via microtemplating
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SYSNO ASEP 0370044 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Tailoring of free standing microchannel structures via microtemplating Author(s) Salamon, D. (NL)
Chlup, Zdeněk (UFM-A) RID, ORCID
Lefferts, L. (NL)
Wessling, M. (NL)Number of authors 4 Source Title Materials Research Bulletin. - : Elsevier - ISSN 0025-5408
Roč. 46, č. 4 (2011), s. 505-511Number of pages 7 s. Language eng - English Country GB - United Kingdom Keywords Ceramics ; Thermogravimetric analysis ; Microstructure Subject RIV JH - Ceramics, Fire-Resistant Materials and Glass CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000289022100004 DOI 10.1016/j.materresbull.2011.01.005 Annotation The preparation of ceramic microchannel structures from powder based material is a time consuming, expensive or inflexible process. This work demonstrates microtemplating – a new reliable and economical fabrication method for preparing ceramic alumina self-supporting microchannels with diameters from 10 to 1000 mm. The basis for this method is the controlled dip-coating of a sacrificial polymeric fiber template with suspensions containing sinterable particles. Subsequent sintering results in self-supporting ceramic microchannels. Thermal behavior of a microtemplate is critical for achieving self-supporting microchannels. We used polyamide, keratin, para-aramide, polypropylene, and polyimide fibers to set models of microtemplate thermal behavior. We found that the negative influence of thermal expansion and gas production could be eliminated by microtemplates with hollow and porous internal structure. Furthermore we show flexibility of the green stage procedure on an alumina microfluidic loop and a multichannel system with gradient porosity. The microtemplating is demonstrated to be an inexpensive and flexible process. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2012
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