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Optical Characterizations of Hot‐Pressed Erbium‐Doped Calcium Fluoride Transparent Ceramic
Author(s) -
Liu Zuodong,
Mei Bingchu,
Song Jinghong,
Li Weiwei
Publication year - 2014
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/jace.12956
Subject(s) - materials science , transparent ceramics , ceramic , dopant , transmission electron microscopy , luminescence , scanning electron microscope , microstructure , analytical chemistry (journal) , doping , nanoparticle , transmittance , mineralogy , optoelectronics , composite material , nanotechnology , chemistry , chromatography
Nanoparticles of erbium‐doped calcium fluoride were synthesised by the coprecipitation method. Micromorphology of the obtained nanoparticles was observed by transmission electron microscopy. The nanoparticles were hot‐pressed in a vacuum environment to achieve Er : CaF 2 transparent ceramic. X‐ray diffraction analysis confirmed the crystallization of a single fluorite phase after sintered. Transmittance spectrum of Er : CaF 2 ceramic sample was measured, and the transmittance at 1200 nm reached about 87%. Microstructures were characterized using field‐emission scanning electron microscopy. The luminescence spectrum of Er : CaF 2 transparent ceramics under 488‐ and 978‐nm excitation was measured and discussed. It was evidenced that strong cross‐relaxation processes between Er 3+ ions occur at high dopant concentration, and favoring the red emission at the expense of the green one.