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Synthesis of Transparent Nd‐doped HfO 2 ‐Y 2 O 3 Ceramics Using HIP
Author(s) -
Ikesue Akio,
Kamata Kiichiro,
Yoshida Kunio
Publication year - 1996
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1996.tb08129.x
Subject(s) - materials science , transmittance , ceramic , doping , transparent ceramics , hot isostatic pressing , analytical chemistry (journal) , composite material , mineralogy , sintering , optoelectronics , chemistry , chromatography
A Nd‐doped HfO 2 ‐Y 2 O 3 ceramic having excellent transmittance was synthesized by HIPing, using high‐purity powders (>99.99 wt%) of Y 2 O 3 , Nd 2 O 3 , and HfO 2 . The mixed powder compacts of these powders were sintered at 1650°C for 1 h under vacuum and HIPed at 1700°C for 3 h under 196 MPa of Ar. The specimen after HIPing consisted of uniform grains measuring about 30 μm and having pore‐free structure. The optical transmittance of 1 at.% Nd‐doped 2.6 mol% HfO 2 ‐Y 2 O 3 ceramics ranging between visible and infrared wavelength was almost equivalent or superior to that of a Nd:Y 2 O 3 single crystal grown by the Verneuil method.