Periclase powders available from domestic (Magnezit JSC) and foreign manufacturers are analyzed for chemical and mineralogical composition. Domestic magnesite is shown to differ from its foreign analogs in smaller values of MgO content, CaO/SiO2 ratio, and periclase crystal size. A way toward obtaining high-quality powers involves reducing the concentration of SiO2 in magnesite to 0.2 – 0.5% and increasing the calcination temperature to 2000 – 2100°C to prepare coarse-grained periclase with a crystal size larger than 140 μm. The need for developing a technology that would enable fabrication of refractory components with tailored structural properties from periclase powder is emphasized.
Refractories and Industrial Ceramics – Springer Journals
Published: Oct 9, 2004
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