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Effect of B2O3 or SiO2 Fluxes on Morphology and Size of Pr-Doped CaTiO3 Phosphor Particles and on their Photoluminescence Properties

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Abstract:

Powder of Pr-doped CaTiO3 red phosphor was prepared at 1473 K by a conventional solid-state reaction method with addition of B2O3 or SiO2 as a flux. Primary particle sizes of the prepared samples were increased by using B2O3 flux but decreased by using SiO2 flux. Clear planes, edges, or steps were observed on surfaces of the primary particles. The intensity of photoluminescence induced by irradiation of light with a wavelength longer than ∼350 nm was enhanced about three times by using B2O3 flux. The intensity of photoluminescence induced by irradiation of light with a wavelength shorter than ∼350 nm was enhanced about twice by using either B2O3 or SiO2 fluxes. The origin for the flux effects is discussed.

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Periodical:

Key Engineering Materials (Volume 497)

Pages:

31-37

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.497.31

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Online since:

December 2011

Authors:

Tôru Kyômen, Ryuta Motani, Minoru Hanaya

Keywords:

Calcium Titanate, Flux, Phosphor, Photoluminescence (PL), Praseodymium

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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