Fabrication of Dense MgO.
NAVAL RESEARCH LAB WASHINGTON D C
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Three methods of hot-pressing dense MgO bodies are described. Two of these methods start with MgO powders, one using LiF or NaF additions, and the other, no additions. The third method involves the direct hot-pressing of precursor salts e.g., MgOH2. The latter two methods use temperatures of approximately 1300C with pressures of 5000 psi for times of about 15 minutes to assure complete densification. The addition of LiF lowered the pressing temperatures 300 to 400C, and the addition of NaF, 200 to 300C. Hot-pressing problems and imperfections in the resulting bodies are discussed to aid in further improvement. The most fundamental problem was removal of the gaseous impurities such as H2O and CO2 from the powders. Vacuum-hot-pressing aided some but did not completely remove them. Author
- Ceramics, Refractories and Glass
- Manufacturing and Industrial Engineering and Control of Production Systems