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P‐82: Synthesis and Characterization of (R 0.96 Eu 0.02 Dy 0.02 ) 2 MgSi 2 O 7 (R=Ca, Sr) Phosphors
Author(s) -
Choi HwaKyung,
Kim JinHo
Publication year - 2007
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.2785347
Subject(s) - phosphor , isostructural , rietveld refinement , materials science , calcination , alkaline earth metal , analytical chemistry (journal) , crystal structure , mineralogy , luminescence , doping , solid solution , lanthanide , crystallography , nuclear chemistry , ion , chemistry , metallurgy , metal , biochemistry , optoelectronics , chromatography , catalysis , organic chemistry
Rare earth ions doped alkaline earth silicate phosphors were prepared by the conventional ceramic processing route under various conditions. The Rietveld refinement of the crystal structure of Ca 2 MgSi 2 O 7 and Sr 2 MgSi 2 O 7 compositions indicated that a single phase of akermanite was well synthesized. (R 0.96 Eu 0.02 Dy 0.02 ) 2 MgSi 2 O 7 (R=Ca, Sr) phosphors showed fairly good optical properties under the processing conditions of non‐additive flux, 1000 °C calcination temperature, and 2mol% activators. (Sr 0.96 Eu 0.02 Dy 0.02 ) 2 MgSi 2 O 7 and (Ca 0.96 Eu 0.02 Dy 0.02 ) 2 MgSi 2 O 7 phosphors emitted 465 nm and 530 nm lights, respectively, by 325 nm exciting sources. Increase of Ca/Sr ratio of (Ca, Sr)‐akermanite phosphor caused the shift of optic‐center from blue to green region throughout the composition range of isostructural Sr‐ and Ca‐akermanites. And median diameters of powdered phosphors were about 3–4 μm.