Farbication of Optically Transparent Lead Magnesium Niobate Polycrystalline Ceramics Using Hot Isostatic Pressing

Namchu Kim, Dean A. McHenry, Sei‐Joo ‐J Jang, Thomas R. Shrout

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12 Scopus citations

Abstract

The physical, dielectric, and optical properties of hot isostatically pressed lead magnesium niobate polycrystalline ceramics modified with 1/2 mol% La2O3, Pb1–3/2xLaxx/2‐(Mg1/3Nb2/3)O3, have been investigated. Methods used to characterize the ceramics included determination of the dielectric permittivity, optical transmittance, and refractive index dispersion. The materials exhibited relaxor ferroelectric type behavior with a peak dielectric constant K > 14000 and average Tc∼−35°C. Various sintering, hot isostatic pressing, and annealing conditions were examined to produce highly dense and optically transparent materials. Through the use of hot isostatic pressing, densities more than 99.5% theoretical and transmittance greater than 50% at 633‐nm wavelength were obtained. Hot isostatic pressing technique appears to be a good alternative to hot uniaxial pressing without the associated problem of PbO volatility, reactivity with the pressure vessel, and geometrical constraints.

Original languageEnglish (US)
Pages (from-to)923-928
Number of pages6
JournalJournal of the American Ceramic Society
Volume73
Issue number4
DOIs
StatePublished - Apr 1990

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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