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Effects of Nd Concentration on Microstructure and Optical Properties of Nd: CaF 2 Transparent Ceramics
Author(s) -
Sun Zaichun,
Mei Bingchu,
Li Weiwei,
Liu Zuodong,
Su Liangbi
Publication year - 2016
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.14463
Subject(s) - materials science , ceramic , microstructure , analytical chemistry (journal) , transparent ceramics , grain size , coprecipitation , impurity , doping , transmittance , attenuation coefficient , mineralogy , metallurgy , chemistry , optics , inorganic chemistry , optoelectronics , physics , organic chemistry , chromatography
Highly transparent Nd‐doped calcium fluoride (Nd: CaF 2 ) ceramics with different Nd‐doped concentrations were fabricated by hot‐pressed method using Nd: CaF 2 nanopowders synthesized by coprecipitation method. SEM observations indicated that the average grain size of nanopowders was about 16–30 nm and the average grain size of the ceramics was between 200 nm and 1 μm. The grain boundaries of the ceramics were clean and no pores or impurities were detected. For 2‐mm‐thickness sample, the transmittance of the as‐fabricated 5 at.% Nd: CaF 2 ceramic at 1200 nm was about 85%. The absorption coefficient and emission intensity of the Nd: CaF 2 ceramics were measured and discussed. From the Nd: CaF 2 ceramics fluorescent spectra and the decay curves, it was found that the fluorescent quenching effect became more evident with the increase in the Nd 3+ ions‐doped concentration.