Effect of NH 4 F additive on purification of AlN ceramics
作者: Dandan WangChuanbin WangMeijuan LiQiang ShenLianmeng Zhang
作者单位: 1Wuhan University of Technology
刊名: Journal of Materials Science: Materials in Electronics, 2017, Vol.28 (9), pp.6731-6736
来源数据库: Springer Journal
DOI: 10.1007/s10854-017-6368-x
关键词: Al2O3Sintered SampleNH4FAluminum NitrideGibbs Free Energy Change
英文摘要: In order to overcome the purification difficulty of aluminum nitride (AlN) ceramics, the sintering of AlN ceramics with ammonium fluoride (NH4F) as an additive had been studied. The results demonstrate that the addition of NH4F evidently affects the phase compositions, the microstructure of grains and the contents of oxygen and nitrogen in the AlN sintered samples. NH4F not only removes oxygen out of AlN grains but also reduces the total oxygen content in AlN ceramics. It is found that relatively high purity of AlN can be acquired when the molar ratio of NH4F/O (oxygen element in raw AlN powder) increases to 0.8. With adequate amount of NH4F, the Al–O–N phases are removed. SEM and TEM results show the hexagonal structures of AlN...
原始语种摘要: In order to overcome the purification difficulty of aluminum nitride (AlN) ceramics, the sintering of AlN ceramics with ammonium fluoride (NH4F) as an additive had been studied. The results demonstrate that the addition of NH4F evidently affects the phase compositions, the microstructure of grains and the contents of oxygen and nitrogen in the AlN sintered samples. NH4F not only removes oxygen out of AlN grains but also reduces the total oxygen content in AlN ceramics. It is found that relatively high purity of AlN can be acquired when the molar ratio of NH4F/O (oxygen element in raw AlN powder) increases to 0.8. With adequate amount of NH4F, the Al–O–N phases are removed. SEM and TEM results show the hexagonal structures of AlN...
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关键词翻译
关键词翻译
  • oxygen 
  • purification 提纯
  • ceramics 陶瓷
  • nitrogen 
  • additive 添加剂
  • removing 删除
  • ammonium 
  • grains 谷粒
  • studied 学习
  • ratio