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

Research output: Contribution to journalArticlepeer-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 languageEnglish
Pages (from-to)1307-1313
Number of pages7
JournalJournal of Solid State Chemistry
Volume181
Issue number6
DOIs
Publication statusPublished - 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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