TY - JOUR
T1 - Farbication of Optically Transparent Lead Magnesium Niobate Polycrystalline Ceramics Using Hot Isostatic Pressing
AU - Kim, Namchu
AU - McHenry, Dean A.
AU - Jang, Sei‐Joo ‐J
AU - Shrout, Thomas R.
PY - 1990/4
Y1 - 1990/4
N2 - The physical, dielectric, and optical properties of hot isostatically pressed lead magnesium niobate polycrystalline ceramics modified with 1/2 mol% La2O3, Pb1–3/2xLax□x/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.
AB - The physical, dielectric, and optical properties of hot isostatically pressed lead magnesium niobate polycrystalline ceramics modified with 1/2 mol% La2O3, Pb1–3/2xLax□x/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.
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U2 - 10.1111/j.1151-2916.1990.tb05137.x
DO - 10.1111/j.1151-2916.1990.tb05137.x
M3 - Article
AN - SCOPUS:0025417290
SN - 0002-7820
VL - 73
SP - 923
EP - 928
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 4
ER -