Pressureless sintering of translucent MgO ceramics
Pressureless sintering of translucent MgO ceramics
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DOI：
10.1016/j.scriptamat.2008.06.007
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发表时间：
2008-10
影响因子：
6
通讯作者：
Dianying Chen;E. Jordan;M. Gell
中科院分区：
文献类型：
--
作者：
Dianying Chen;E. Jordan;M. Gell
采用湿法沉淀法合成了氧化镁纳米晶粉末。X射线衍射仪分析表明，热处理前驱体粉末在∼500℃时形成晶态氧化镁相，在常压下1400℃常压烧结2 h可制得半透明氧化镁陶瓷。烧结后的氧化镁陶瓷的相对密度为98.1%，平均硬度为6.8 Gpa。扫描电子显微镜表征表明，半透明氧化镁陶瓷的平均晶粒度为∼6μm。
MgO nanocrystalline powders were synthesized via a wet precipitation process. X-ray diffraction analysis of the heat-treated precursor powders shows that a crystalline MgO phase forms at ∼500°C. Translucent MgO ceramics were prepared by pressureless sintering the nanocrystalline MgO powders at 1400°C for 2h under ambient atmosphere. The as-sintered MgO ceramics have a relative density of 98.1% with an average hardness of 6.8GPa. Scanning electron microscope characterization revealed that the translucent MgO ceramics have an average grain size of ∼6μm.