Transparent Lu 3NbO 7 bodies prepared by reactive spark plasma sintering and their optical and mechanical properties

Liqiong An, Akihiko Ito, Takashi Goto

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Transparent lutetium niobate (Lu 3NbO 7) bodies were prepared by reactive spark plasma sintering using Lu 2O 3 and Nb 2O 5 powders. Fully dense Lu 3NbO 7 bodies with density greater than 99.5% of the theoretical were obtained at 1300-1650 °C. The grains steadily grew from 0.1 to 0.6 μm with increasing sintering temperature from 1200 to 1450 °C and significant grain growth from 2.2 to 9.2 μm occurred at 1550-1650 °C. The Lu 3NbO 7 body sintered at 1450 °C showed the highest transmittance of 63% at 550 nm after heat treatment at 850 °C in air for 6 h. Fully dense, submicron-size transparent Lu 3NbO 7 exhibited Vickers hardness of ∼13.0 GPa and indentation fracture toughness of 1.0 MPa m 1/2.

Original languageEnglish
Pages (from-to)383-387
Number of pages5
JournalCeramics International
Volume39
Issue number1
DOIs
Publication statusPublished - 2013 Jan 1

Keywords

  • A. Sintering
  • C. Optical property
  • D. Niobates
  • Transparent ceramics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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