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Title: Phosphors Surface Modification and Luminescence Enhancement by Microwave Energy
Authors: Horng-Yi Chang
Chen-Yu Wu
Ching-Iuan Sheu
Chia-Hsin Lin
Syh-Yuh Cheng
Contributors: 國立臺灣海洋大學:輪機工程學系
Keywords: Sand-milling
Microwave annealing
Date: 2013-05
Issue Date: 2018-09-04T02:07:16Z
Publisher: Materials Letters
Abstract: Abstract: Nano-rod particles spread on the sand-milled Y₂O₃ submicron phosphor particles surface resulted in a reduction of crystallinity and luminescence. It exhibited an abnormally large particle size with a step-like particle surface by furnace annealing at 1400°C–10min with a ramp 10°C/min. The decreased photoluminescence (PL) and crystallinity could be recovered to the original intensity of commercial phosphors by furnace and microwave annealing. The 611nm PL intensity and crystallinity of 900°C with a ramp >40°C/min microwave annealed samples was higher than that of the 1200°C with a ramp 10°C/min furnace annealed ones. The main differences between microwave and furnace annealing were fast smoothing, recrystallization with a limited grain growth and effective activator homogenization at a lower temperature for the microwave annealing.
Relation: 98 pp.222-225
Appears in Collections:[Department of Marine Engineering] Periodical Articles

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