Premium
Fabrication of Nanostructured Metallized Glazes by Conventional Fast‐Firing Route
Author(s) -
Moya José S.,
Pecharromán Carlos,
Montero Isabel,
PinaZapardiel Raúl,
EstebanCubillo Antonio,
Reinosa Julián J.,
Fernandez José F.
Publication year - 2011
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2011.04399.x
Subject(s) - glaze , materials science , fabrication , nanometre , nanoparticle , chemical engineering , carbon black , carbon fibers , microstructure , mineralogy , phase (matter) , metallurgy , composite material , nanotechnology , composite number , chemistry , ceramic , alternative medicine , natural rubber , engineering , medicine , organic chemistry , pathology
A metallized glaze, suitable for large‐scale production, has been obtained starting from sepiolite‐n(Cu, Fe) as a stable vector containing the metal‐dispersed nanoparticles and following a conventional fast‐firing fabrication route. A small fraction of black carbon (about 4 wt%) was added to the starting mixture of the glaze to avoid oxidation of Cu nanoparticles in the 500°–700°C temperature range. At higher temperature (700°–1190°C), a fraction of the oxygen dissolved in the glassy phase is consumed by the Fe°/Fe 2+ and Fe 2+ /Fe 3+ redox reaction. Based on ellipsometric and quantitative optical reflectance measurements, it has been proven that the presence of a minimum concentration of Cu nanoparticles (∼10 vol%) in the top surface glaze layer is a prerequisite to obtain an appropriate metalize glaze.