Premium
Hydrothermal synthesis of rare‐earth magnetoplumbite phosphors for plasma‐display applications
Author(s) -
Ravichandran D.,
Roy Rustum,
White William B.
Publication year - 1998
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/1.1985211
Subject(s) - phosphor , hydrothermal circulation , materials science , hydrothermal synthesis , plasma display , rare earth , emission intensity , emission spectrum , crystal structure , analytical chemistry (journal) , spectral line , luminescence , mineralogy , crystallography , chemistry , chemical engineering , optoelectronics , metallurgy , physics , electrode , chromatography , astronomy , engineering
— Green phosphors with a nominal composition Ce 1−x Tb x MgAl 11 O 19 (CAT phosphors) (0.05 ≤ × ≤ 0.5) have been prepared under hydrothermal conditions. The phosphor CeMgAl 11 O 19 : Tb 3+ crystallizes in the magnetoplumbite structure. The Tb 3+ emission intensity at 545 nm varies with Tb 3+ composition and reaches a maximum at × = 0.1. The excitation spectra were characteristic of Ce 3+ , but no Ce 3+ emission was observed. Internal energy transfer from Ce 3+ → Tb 3+ is complete. SEM micrographs show well‐crystallized faceted crystal platelets with a particle size of ∼0.4 μm.