ISSN:
1662-0356
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Natural Sciences in General
,
Technology
Notes:
Nanostructured ceramic thin films and membranes are used for protective or functionalpurposes and prepared on dense or porous substrate materials. Wet chemical methods enablecheap, low-temperature, mass-scale manufacturing routes. They produce fine-grained porous anddense micro-structures that cannot be realized otherwise. In wet-chemical processing, cleannanoparticle dispersions are deposited on the substrate at, primarily, ambient conditions. Thedeposition is followed by a (rapid) thermal processing treatment to remove liquids and organicadditives, to convert precursors to the target composition, and to establish the final porous anddense micro-structure. In the synthesis of precursor dispersions it is very important to obtainnanoparticles with a near-isometric shape and a fairly narrow particle size distribution, without theformation of secondary (agglomerate) structures. In particular the latter requires careful control ofsolution and interfacial chemistry to achieve proper colloidal stability, during and after thesynthesis process. Characterization of coating integrity, defect morphology and defect populationis done by decoration methods, microscopy, ellipsometry and statistical methods that employmembrane transport properties
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.45.1252.pdf
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