Highly-doped Nd:YAG ceramics fabricated by conventional and high pressure SPS

Avital Wagner, Barak Ratzker, Sergey Kalabukhov, Sofiya Kolusheva, Maxim Sokol, Nachum Frage*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Spark plasma sintering (SPS) is an effective process for the fabrication of highly transparent oxide ceramics for photonic applications. In the present study, Nd-doped yttrium aluminum garnet (Nd:YAG) ceramics with various dopant concentrations (0.5–5 at.%) were fabricated at 1300–1400 °C using conventional SPS (60 MPa) and high pressure (300 MPa) conditions. The appearance, X-ray diffraction pattern, densification regime, microstructure, mechanical and optical properties were compared; the dependency on Nd concentration and sintering pressure is discussed. The pressure applied during the sintering process seemed to have only a minor effect on the luminescent properties, while the mechanical properties were superior for the samples sintered under high pressure conditions. The known concentration quenching phenomenon was observed and an equation for estimation of the Nd concentration, based on phosphorescence lifetime, is suggested.

Original languageEnglish
Pages (from-to)12279-12284
Number of pages6
JournalCeramics International
Volume45
Issue number9
DOIs
StatePublished - 15 Jun 2019
Externally publishedYes

Keywords

  • Nd:YAG
  • Optical properties
  • Spark plasma sintering

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