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Transparent polycrystalline MgO ceramic fabricated by low-temperature vacuum sintering with MgF2 additive.
- Source :
-
Ceramics International . Oct2023, Vol. 49 Issue 20, p32868-32873. 6p. - Publication Year :
- 2023
-
Abstract
- This study introduces transparent MgO ceramics produced via simply vacuum sintering at 1200–1500 °C by optimal incorporation of MgF 2 as a sintering additive. The effect of MgF 2 content and sintering temperature on the densification process, optical, and thermal properties of MgO ceramics is presented with emphasis on its function as a sintering aid and adverse effect of MgF 2 evaporation in the condition of high MgF 2 content or high sintering temperature. MgO ceramic with 1.0 mol% MgF 2 sintered at 1300 °C exhibits the highest relative density of 99.95% with average grain size of 17.46 μm. The in-line transmittance attains 60% at 1000 nm and >80% in the infrared range (3.8–6.8 μm), without absorption bands originated from the carbon contamination. The corresponding room-temperature thermal conductivity reaches 47.25 W/(m∙K). These results demonstrate that MgF 2 is an outstanding sintering additive for the preparation transparent MgO ceramics. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 49
- Issue :
- 20
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 171367943
- Full Text :
- https://doi.org/10.1016/j.ceramint.2023.07.260