Phosphorescent luminescence of pure magnesium oxide transparent ceramics produced by spark plasma sintering

Shingo Wakahara, Takayuki Yanagida, Yuui Yokota, Yutaka Fujimoto, Valery Chani, Makoto Sugiyama, Yoshisuke Futami, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Magnesium oxide (MgO) ceramics fabricated by Spark Plasma Sintering (SPS) method at different sintering temperatures were studied to evaluate optical properties including phosphorescent emission. All the samples were visually transparent. Especially, the ceramic sintered at 1900 °C demonstrated high transparency up to 60-70% in wavelengths range exceeding 300 nm. The phosphorescent emission originated from oxygen vacancies (F+ centers) at approximately 390 nm was observed in all the specimens. All the ceramics exhibited similar phosphorescent decay times consisting of three components of 3, 12 and 75 s. The phosphorescence was observed with naked eyes in a dark room after removing the excitation source.

Original languageEnglish
Pages (from-to)558-562
Number of pages5
JournalOptical Materials
Volume35
Issue number3
DOIs
Publication statusPublished - 2013 Jan

Keywords

  • Phosphorescent emission
  • SPS
  • Transparent ceramics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering

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