Thermal and optical properties of transparent magnesium oxide ceramics fabricated by post hot-isostatic pressing

Kiyoshi Itatani, Takuma Tsujimoto, Akira Kishimoto

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

The transparent magnesium-oxide (MgO) ceramic could be fabricated by a hot-isostatic press (HIP) technique of pressureless-sintered MgO compact, using non-agglomerated MgO powder with the average primary particle size of 57 nm. The relative density and average grain size of MgO compact pressureless-sintered at 1600 °C for 5 h were 96.7% and 10.7 μm, respectively. Owing to the HIPing operation (0.5 h) of pressureless-sintered compact at a temperature between 1500 and 1600 °C, relative densities of the MgO ceramics attained 99.9% or more with light transmission. The average grain size increased from 132 to 199 μm with HIPing temperature from 1500 to 1600 °C. The in-line transmission of the MgO specimen HIPed at 1600 °C for 0.5 h increased from 52 to 55% with increasing wavelength from 500 to 900 nm and corresponded to approximately 65%, compared to that of the MgO single crystal. The thermal conductivity of this MgO specimen attained 53.5 W m-1 K-1, whereas the thermal diffusivity decreased gradually to reach 0.0416 cm2 s-1 with increasing test temperature up to 873 K.

Original languageEnglish
Pages (from-to)639-645
Number of pages7
JournalJournal of the European Ceramic Society
Volume26
Issue number4-5
DOIs
Publication statusPublished - 2006

Fingerprint

Magnesium Oxide
Hot isostatic pressing
Magnesia
Thermodynamic properties
Optical properties
Thermal diffusivity
Light transmission
Powders
Temperature
Electric lines
Thermal conductivity
Particle size
Single crystals
Wavelength

Keywords

  • Grain size
  • Hot-isostatic pressing
  • MgO
  • Optical properties
  • Thermal conductivity

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Thermal and optical properties of transparent magnesium oxide ceramics fabricated by post hot-isostatic pressing. / Itatani, Kiyoshi; Tsujimoto, Takuma; Kishimoto, Akira.

In: Journal of the European Ceramic Society, Vol. 26, No. 4-5, 2006, p. 639-645.

Research output: Contribution to journalArticle

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