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Infrared‐Transparent Y 2 O 3 –MgO Nanocomposites Using Sol–Gel Combustion Synthesized Powder
Author(s) -
Wang Jiwen,
Chen Dianying,
Jordan Eric H.,
Gell Maurice
Publication year - 2010
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.1551-2916.2010.04071.x
Subject(s) - materials science , nanocomposite , sol gel , composite number , annealing (glass) , infrared , sintering , combustion , hot isostatic pressing , transmittance , powder diffraction , analytical chemistry (journal) , composite material , nanotechnology , crystallography , optics , chemistry , organic chemistry , physics , optoelectronics
Y 2 O 3 –MgO composite nanopowder with a volume ratio of 50:50 was synthesized using a sol–gel combustion process. X‐ray diffraction analysis of the as‐synthesized nanopowder shows phase pure Y 2 O 3 and MgO with a cubic crystal structure and crystalline size ∼15 nm. The fully dense Y 2 O 3 –MgO nanocomposites were prepared by pressureless sintering the composite nanopowder at 1400°C for 2 h, followed by hot isostatic pressing at 1350°C for 1 h and postsinter annealing at 1000°C for 10 h. The Y 2 O 3 –MgO nanocomposite exhibit excellent infrared transmittance (62%–80%) over 3–7 μm infrared wavelength ranges with an average hardness of 10.6 GPa.