... 650-700C 2,heavy silicon treatment 3,water heating element Medium temperature magnesium oxide powder with silicon1,temp 650-700C2,heavy ... Al2O3 Mesh (F.R)S/100g (T.D)g/cm³ Medium Temperature MTM ≥94 ≤1.5 ≤0.5 ≤2.5 ≤0 ... HUMID CONDITIONMΩ V w/cm² mA V MΩ V H Medium temperature Medium temperature magnesium oxide powder with silicon