Formation mechanism and luminescence appearance of Mn-doped zinc silicate particles synthesized in supercritical water

Masafumi Takesue; Atsuko Suino; Yukiya Hakuta; Hiromichi Hayashi; Richard Lee Smith

doi:10.1016/j.jssc.2008.02.036

Formation mechanism and luminescence appearance of Mn-doped zinc silicate particles synthesized in supercritical water

Masafumi Takesue, Atsuko Suino, Yukiya Hakuta, Hiromichi Hayashi, Richard Lee Smith

ENV - Frontier Science for Advanced Environment

Research output: Contribution to journal › Article › peer-review

36 Citations (Scopus)

Abstract

Luminescence appearance of Mn-doped zinc silicate (Zn₂SiO₄:Mn²⁺, ZSM) formed in supercritical water at 400 °C and 29 MPa at reaction times from 1 to 4320 min was studied in the relation to its phase formation mechanism. Appearance of luminescent ZSM from green emission by α-ZSM and yellow emission by β-ZSM occurred over the same time period during the onset of phase formation at a reaction time of 2 min. Luminescence appeared at a much lower temperature and at shorter reaction times than the conventional solid-state reaction. Needle-like-shaped α-ZSM was the most stable particle shape and phase in the supercritical water reaction environment and particles formed via two routes: a homogenous nucleation route and a heterogenous route that involves solid-state diffusion and recrystallization.

Original language	English
Pages (from-to)	1307-1313
Number of pages	7
Journal	Journal of Solid State Chemistry
Volume	181
Issue number	6
DOIs	https://doi.org/10.1016/j.jssc.2008.02.036
Publication status	Published - 2008 Jun 1

Keywords

Hydrothermal reaction
Inorganic phosphor
Low-temperature process
Luminescence appearance
Phase formation
Supercritical water

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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title = "Formation mechanism and luminescence appearance of Mn-doped zinc silicate particles synthesized in supercritical water",

abstract = "Luminescence appearance of Mn-doped zinc silicate (Zn2SiO4:Mn2+, ZSM) formed in supercritical water at 400 °C and 29 MPa at reaction times from 1 to 4320 min was studied in the relation to its phase formation mechanism. Appearance of luminescent ZSM from green emission by α-ZSM and yellow emission by β-ZSM occurred over the same time period during the onset of phase formation at a reaction time of 2 min. Luminescence appeared at a much lower temperature and at shorter reaction times than the conventional solid-state reaction. Needle-like-shaped α-ZSM was the most stable particle shape and phase in the supercritical water reaction environment and particles formed via two routes: a homogenous nucleation route and a heterogenous route that involves solid-state diffusion and recrystallization.",

keywords = "Hydrothermal reaction, Inorganic phosphor, Low-temperature process, Luminescence appearance, Phase formation, Supercritical water",

author = "Masafumi Takesue and Atsuko Suino and Yukiya Hakuta and Hiromichi Hayashi and Smith, {Richard Lee}",

year = "2008",

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T1 - Formation mechanism and luminescence appearance of Mn-doped zinc silicate particles synthesized in supercritical water

AU - Takesue, Masafumi

AU - Suino, Atsuko

AU - Hakuta, Yukiya

AU - Hayashi, Hiromichi

AU - Smith, Richard Lee

PY - 2008/6/1

Y1 - 2008/6/1

N2 - Luminescence appearance of Mn-doped zinc silicate (Zn2SiO4:Mn2+, ZSM) formed in supercritical water at 400 °C and 29 MPa at reaction times from 1 to 4320 min was studied in the relation to its phase formation mechanism. Appearance of luminescent ZSM from green emission by α-ZSM and yellow emission by β-ZSM occurred over the same time period during the onset of phase formation at a reaction time of 2 min. Luminescence appeared at a much lower temperature and at shorter reaction times than the conventional solid-state reaction. Needle-like-shaped α-ZSM was the most stable particle shape and phase in the supercritical water reaction environment and particles formed via two routes: a homogenous nucleation route and a heterogenous route that involves solid-state diffusion and recrystallization.

AB - Luminescence appearance of Mn-doped zinc silicate (Zn2SiO4:Mn2+, ZSM) formed in supercritical water at 400 °C and 29 MPa at reaction times from 1 to 4320 min was studied in the relation to its phase formation mechanism. Appearance of luminescent ZSM from green emission by α-ZSM and yellow emission by β-ZSM occurred over the same time period during the onset of phase formation at a reaction time of 2 min. Luminescence appeared at a much lower temperature and at shorter reaction times than the conventional solid-state reaction. Needle-like-shaped α-ZSM was the most stable particle shape and phase in the supercritical water reaction environment and particles formed via two routes: a homogenous nucleation route and a heterogenous route that involves solid-state diffusion and recrystallization.

KW - Hydrothermal reaction

KW - Inorganic phosphor

KW - Low-temperature process

KW - Luminescence appearance

KW - Phase formation

KW - Supercritical water

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DO - 10.1016/j.jssc.2008.02.036

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JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

SN - 0022-4596

IS - 6

ER -

Formation mechanism and luminescence appearance of Mn-doped zinc silicate particles synthesized in supercritical water

Abstract

Keywords

ASJC Scopus subject areas

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