High-density aluminum nitride ceramics were fabricated without sintering additives under high pressure (3.1-5.0GPa) and different temperature (1300-1800℃) in China-type cubic anvil high-pressure and high-temperature apparatus, using AlN powder produced by SHS method as starting material. The effects of sintering conditions, i.e. time, temperature and pressure, on sintering characteristics of AlN ceramics were studied. The sintered bodies were characterized by XRD and SEM. The results show that high pressure sintering can lower the sintering temperature and shorten the sintering time. The microstructure of the sintered bodies is homogeneous. The relative density of AlN ceramics sintered at 5.0GPa and 1300℃ for 50min is 94.92%. The lattice parameters of the specimens sintered at 5.0GPa and 1700℃ for 125min are decreased by about 0.09% than that of the AlN powder.
LI Xiao-Lei
,
MA Hong-An
,
ZUO Gui-Hong
,
ZHENG You-Jin
,
LI Ji-Gan
,
JIA Xiao-Peng
. High Pressure Sintering of AlN Ceramics[J]. Journal of Inorganic Materials, 2008
, 23(1)
: 104
-108
.
DOI: 10.3724/SP.J.1077.2008.00104
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