TY - JOUR

T1 - The color of nanodispersed gold, silver and gold-silver solid solutions in glass matrices

AU - Rüscher, C. H.

AU - Speer, D.

PY - 2001/6

Y1 - 2001/6

N2 - Ceramic colors were prepared by a standard procedure of Au and Ag basis compounds in a glass flux. The products were processed into decals on standard porcelain and fired in a temperature gradient between 760 and 860°C. The temperature treatment reveal small nanodispersed metal particles with average diameter between 27 and 43 nm. The yellow color of decals containing Ag metal particles is related to the absorption of light by Mie absorption peaked at about 2,9 eV (absorption in the blue). The decreasing intensity of yellow color with increasing firing temperature can be explained by a gradually decreasing concentration of Ag metal. The purple color of decals containing Au metal particles is due to Mie absorption peaked at about 2,3 eV, which appears to be superimposed to interband transitions. Both the intensity of Mie absorption and the band-band contribution decrease due to the increase of the crystal sizes with increasing firing temperature. The mixture of similar amounts of Ag and Au basis compo unds shows a variation in their colour due to alloying. The realted shift in the position of the Mie absorption peak indicates that Au is alloyed by Ag only up to about 25 % at the lower firing temperature. The Ag content in Au decreases with increasing firing temperature.

AB - Ceramic colors were prepared by a standard procedure of Au and Ag basis compounds in a glass flux. The products were processed into decals on standard porcelain and fired in a temperature gradient between 760 and 860°C. The temperature treatment reveal small nanodispersed metal particles with average diameter between 27 and 43 nm. The yellow color of decals containing Ag metal particles is related to the absorption of light by Mie absorption peaked at about 2,9 eV (absorption in the blue). The decreasing intensity of yellow color with increasing firing temperature can be explained by a gradually decreasing concentration of Ag metal. The purple color of decals containing Au metal particles is due to Mie absorption peaked at about 2,3 eV, which appears to be superimposed to interband transitions. Both the intensity of Mie absorption and the band-band contribution decrease due to the increase of the crystal sizes with increasing firing temperature. The mixture of similar amounts of Ag and Au basis compo unds shows a variation in their colour due to alloying. The realted shift in the position of the Mie absorption peak indicates that Au is alloyed by Ag only up to about 25 % at the lower firing temperature. The Ag content in Au decreases with increasing firing temperature.

UR - http://www.scopus.com/inward/record.url?scp=0035365040&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0035365040

VL - 78

SP - E41-E45

JO - CFI Ceramic Forum International

JF - CFI Ceramic Forum International

SN - 0173-9913

IS - 6

ER -