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Origin of the Red Color of Satsuma Copper‐Ruby Glass as Determined by EXAFS and Optical Absorption Spectroscopy
Author(s) -
Nakai Izumi,
Numako Chiya,
Hosono Hideo,
Yamasaki Kazuo
Publication year - 1999
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.1151-2916.1999.tb01818.x
Subject(s) - copper , electron microprobe , absorption (acoustics) , x ray absorption fine structure , absorption spectroscopy , analytical chemistry (journal) , spectroscopy , microprobe , extended x ray absorption fine structure , materials science , chemistry , mineralogy , optics , metallurgy , composite material , physics , chromatography , quantum mechanics
The origin of the ruby color of Satsuma glass, a famous copper‐ruby glass produced in Japan in the mid‐19th century, has been examined by electron microprobe analysis (EPMA), X‐ray absorption fine structure (XAFS), and optical absorption spectroscopy analyses. Cu K XAFS analysis reveals that the major component of copper in the ruby glass consists of Cu(I) ions in the glass structure. This species is distinct from Cu 2 O (cuprite), which we conclude is not responsible for the ruby color. Optical absorption spectra measured at 300 and 77 K clearly distinguishes the absorptions due to the colloidal particles of metallic copper and Cu 2 O. It is concluded that the trace amount of copper in the ruby glass, which is below the detection limit of the EPMA and XAFS techniques, exists as metallic copper particles of nanometer size and is responsible for the ruby‐red appearance of the Satsuma glass.