Magnesium Oxide Powder

WD-7 is an Aluminium Tube Powder with heavy silicone treatment and higher tap density, especially suitable for aluminum elements. Elements stuffed with this material are proposed to be annealed at 300℃ for 1.5 hours or at 420℃ for 15mins. Chemical Analysis (%) MgO CaO Al2O2 Fe2O3 SiO2 ≥94.0 ≤1.5 ≤0.9 ≤0.5 ≤2.5 Particle Distribution Mesh ＋40 ＋60 ＋80 ＋140 ＋20 0 ＋325 －325 Dia(um) ＋425 ＋250 ＋180 ＋106 A 291;75 ＋45 －45
Quantity(%)0－1 26－38 16－24 18－28 6ʌ 93;14 8－14 0－8 Tap Density 2.36－2.50g/cm3 Flow 3# Ford
Cup（φ2.165mm－2.185mm）：160&# 65293;240s/100g 4# Ford

Cup（φ3.97mm－4.01mm）：34ʌ ; 93;40s/100g Electrical Property Testing Condition Tube ??Copper coated iron Reduction ??φ8.0mm→φ6.6mm Wire ??0Cr25A15，φ0.30mm Helix ??φ2.3mm Heated length ??30.0cm－32.0cm Energized period ??15 mins Remark: Forusers?reference, the chart here shows typical values of performance by this type of powder.