Preparation of MgF2 Translucent Ceramic by Hot Pressing Sintering
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2015年第4期
论文作者：彭敏红 CAO Weiping 宋金红
文章页码：720 - 723
摘 要：The aim of this work was to prepare MgF2 translucent ceramic by using nanopowders as raw materials and to study its properties.The MgF2 nanopowders were prepared using chemical precipitation and the translucent ceramics were fabricated by hot-pressing sintering in a vacuum environment. X-ray diffraction analysis showed that the powders were homogeneous with an average particles size about 13 nm. By comparing the results of transmission electron microscopy, it could be concluded that the porous structure of precursor powders could be improved by calcination. The SEM images of MgF2 indicated that the as-prepared ceramics were well densified at 900 ℃. The photo of the ceramic sample showed that high translucence is a main breakthrough in the field of Mg F2 materials preparation. For the translucent ceramic sample sintered at 900 ℃, the Vickers hardness and density were 5.55 GPa and 98.74%, respectively, and its highest transmittance with thickness of 1mm reached 87% in the wavelength from 2.5 μm to 10 μm, all which made it advantageous to be a kind of infrared windows and dome materials.
彭敏红1，CAO Weiping2，宋金红1
1. Center of Materials Research and Analysis, Wuhan University of Technology2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology
摘 要：The aim of this work was to prepare MgF2 translucent ceramic by using nanopowders as raw materials and to study its properties.The MgF2 nanopowders were prepared using chemical precipitation and the translucent ceramics were fabricated by hot-pressing sintering in a vacuum environment. X-ray diffraction analysis showed that the powders were homogeneous with an average particles size about 13 nm. By comparing the results of transmission electron microscopy, it could be concluded that the porous structure of precursor powders could be improved by calcination. The SEM images of MgF2 indicated that the as-prepared ceramics were well densified at 900 ℃. The photo of the ceramic sample showed that high translucence is a main breakthrough in the field of Mg F2 materials preparation. For the translucent ceramic sample sintered at 900 ℃, the Vickers hardness and density were 5.55 GPa and 98.74%, respectively, and its highest transmittance with thickness of 1mm reached 87% in the wavelength from 2.5 μm to 10 μm, all which made it advantageous to be a kind of infrared windows and dome materials.
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