Synthesis Yttrium Aluminum Garnet Precursor via Homogeneous Precipitation under Microwave Irradiation
来源期刊：JOURNAL OF RARE EARTHS2004年第6期
论文作者：于庆华 王介强 郑少华 高新睿 姜奉华
Key words：microwave homogenous synthesis; YAG powders; sinterability; (NH4)2SO4; rare earths;
Abstract: The lowly-agglomerated single-phase YAG nanopowders were synthesized for the first time by the microwave homogeneous precipitation in the presence of urea. The composition and transformations during calcination of YAG precursor were analyzed by IR, DTA/TG and XRD. The size and morphology of YAG powders were characterized by LD and TEM methods. Results show that amorphous precursor synthesized under [urea]/[metal ions] molar ratio of 15 crystallizes directly to single-phase YAG at 900 ℃ . The size distribution and sinterability of YAG powders are obviously improved by adding(NH4)2SO4 into the reaction solution. YAG powders obtained from precursor with the(NH4)2SO4 content of 8% have good sinterability and are highly densified at a temperature of 1500 ℃.
于庆华1，王介强1，郑少华1，高新睿1，姜奉华1
(1.Material Science and Engineering School, Jinan University, Jinan 250022,China)
Abstract:The lowly-agglomerated single-phase YAG nanopowders were synthesized for the first time by the microwave homogeneous precipitation in the presence of urea. The composition and transformations during calcination of YAG precursor were analyzed by IR, DTA/TG and XRD. The size and morphology of YAG powders were characterized by LD and TEM methods. Results show that amorphous precursor synthesized under [urea]/[metal ions] molar ratio of 15 crystallizes directly to single-phase YAG at 900 ℃ . The size distribution and sinterability of YAG powders are obviously improved by adding(NH4)2SO4 into the reaction solution. YAG powders obtained from precursor with the(NH4)2SO4 content of 8% have good sinterability and are highly densified at a temperature of 1500 ℃.
Key words:microwave homogenous synthesis; YAG powders; sinterability; (NH4)2SO4; rare earths;
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