Enhanced growth of Y3al5O12:Ce3+ nanocrystals in mesoporous SiO2 utilizing vacuum-assisted impregnation
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Published:2020
Issue:2
Volume:14
Page:141-145
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ISSN:1820-6131
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Container-title:Processing and Application of Ceramics
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language:en
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Short-container-title:PAC
Author:
Ranjan Bikas1,
Shinozaki Kenji1,
Yamashita Masaru1,
Akai Tomoko1
Affiliation:
1. National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka, Japan
Abstract
YAG:Ce nanocrystals were successfully formed within silica matrix via
impregnation of a YAG:Ce precursor solution in mesoporous silica, followed
by sintering. In this study, vacuum-assisted impregnation was applied to
increase the size of YAG:Ce nanocrystals in a silica matrix. The size of the
YAG:Ce nanocrystals stabilized in the silica matrix via impregnation under
atmospheric pressure was 18 nm. By applying vacuum-assisted impregnation,
the size of the nanocrystals increased to 31 nm. The photoluminescence
spectra of the obtained silica-YAG:Ce composites revealed that there was an
approximate three-fold increase in the intensity of emission when
vacuum-assisted impregnation was applied. The internal quantum efficiency
also increased from 13.6% to 32.2%.
Publisher
National Library of Serbia
Subject
Ceramics and Composites