镁氧化物粉末（85%-90%)

Magnesium Oxide is white, amorphous,odorless ,smell-less and nontoxic.It can also be soluble in acid and ammonium salt solution ,be difficult to dissolve in water and be slightly soluble in alcohol. It can be changed into crystal by high-temperature burning above 1000oC and into dead-burned magnesium oxide or sintered magnesium oxide above 1500oC.When meeting with carbon dioxide and moisture in the air gradually ,it will be converted into magnesium carbonate. It is widely used as hgh-temperature refractory material and be used as raw material for the production of magnesium sulfate ,magnesium nitrate and magnesium carbonate . Density(g/cm3):0.85-1.05 Bending strength (M/mm):18Mpa Breaking load:113-498 Thermal resistance :>1.14m2k/w Sound insulations :>44Db Shriking rate when heated:1.0% Rete of length change(wetting%):Below0.26% Non flammability :Fire proof 1st grade Thickness :3mm-80mm Standard width and length :1220mm*2440mm Dry wet deforming ratio :0.26% Water absorbing capability:15% Creasing resistance:15Mpa Index of Magnesium Oxide balls (powder) Item Variety Specification Burning loss(%) Sio2 % Fe2o2 % Al2o3 % Cao % Mgo % Magnesium oxide(balls) 50*20*25 8.0-9.0 6.0 0.9-0.95 ≤1.7 ≤1.2 80-85 Magnssium oxide(balls) 50*20*25 9.0-9.5 6.5 0.95-0.96 ≤1.7 ≤1.2 75-80 Magnesium oxide (balls) 50*20*25 10.0 7.0 0.95-0.96 ≤1.7 ≤1.5 70-75 Magnesium oxide (power) 140 8.0 6.0 0.90-0.95 ≤1.7 ≤1.2 80-85 Magnesium oxide (power) 140 9.0 6.5 0.95-0.96 ≤1.7 ≤1.2 75-80 Magnesium oxide (power) 140 10.0 7.0 0.95-0.96 ≤1.7 ≤1.5 70-75