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Formation of Sm 2+ lons in Sol‐Gel‐Derived Glasses of the System Na 2 O‐Al 2 O 3 ‐SiO 2
Author(s) -
Nogami Masayuki,
Hayakawa Naoya,
Sugioka Naoya,
Abe Yoshihiro
Publication year - 1996
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.1151-2916.1996.tb08581.x
Subject(s) - ion , photoluminescence , aluminosilicate , samarium , analytical chemistry (journal) , sol gel , hydrolysis , activation energy , materials science , chemistry , mineralogy , nuclear chemistry , inorganic chemistry , catalysis , nanotechnology , biochemistry , optoelectronics , organic chemistry , chromatography
Samarium ions (Sm 2+ ) incorporated into aluminosilicate glasses by a sol‐gel process showed persistent spectral hole burning at room temperature. Gels of the system Na 2 O‐Al 2 O 3 SiO 2 synthesized by the hydrolysis of Si(OC 2 H 5 ) 4 , Al(OC 4 H 9 ) 3 , CH 3 COONa, and SmCl 3 ·6H 2 O were heated in air at 500°C, then reacted with H 2 gas to form Sm 2+ ions. Whereas Al 3+ ions effectively dispersed the Sm 3+ ions in the glass structure, Na + ions were not effective. The Al 2 O 3 ‐SiO 2 glasses proved appropriate for reacting the Sm 3+ ions with H 2 gas and exhibited the intense photoluminescence of Sm 2+ ions. The reaction of Sm 3+ ions with H 2 in the Al 2 O 2 ‐SiO 2 glasses was determined by first‐order kinetics, and the activation energy equaled 95 kJ/mol. At 800°C, the maximum photoluminescence of the Sm 2+ ions was achieved within 20 min.