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Effect of LiF on the optical transmittance of magnesium aluminate spinel |
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| Authors: | Fahui Li Hong Lin Jianbao Li Muyun Lei Cunxin Huang Fang Wen |
| Affiliation: | 1. Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China 2. Research Institute of Synthetic Crystals, Beijing, 100018, China 3. School of Materials Science and Chemical Engineering, Hainan University, Haikou, 570228, China 4. Bright Crystals Technology, Inc., Beijing, 100018, China |
| Abstract: | The effect of LiF as a sintering aid to the optical transparency of magnesium aluminate (MgAl2O4) spinel ceramics is studied. The spinel ceramics is prepared in a process proved to be suitable for commercial production. LiF, in different concentrations ranging from 0–2.5 wt%, is doped into MgAl2O4 powders prepared by sol-gel method. Sample MgAl2O4 ceramic discs are fabricated by ball milling, cold pressing, and hot-pressing, or hot-isostatic-pressing of the powder mixtures. Optical transparency measurements show that, hot-pressed samples exhibit higher transparency when more LiF is added. While for hot-isostatic pressed samples, excessive LiF content leads to a decrease in optical transparency. The optimal LiF doping quantity is suggested for the present technique. |
| Keywords: | transperent ceramics spinel liF sintering aid |
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