Explanatory notes
… etc. The main types are : (1) Fused magnesia , obtained by fusion. It is usually colourless but may be slightly … ovens. (2) Dead‑burned (sintered) magnesia , obtained by high temperature (about 1400‑1800 ° C) calcination. … Caustic‑burned magnesia , usually obtained from magnesite by relatively low temperature (lower than 900 ° C) …