WD-7 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	+200	+325	-325
Dia(um)	+425	+250	+180	+106	+75	+45	-45
Quantity (%)	0-1	26-38	16-24	18-28	6-14	8-14	0-8

Tap Density

2.36-2.50g/cm3

Flow

3# Ford Cup(φ2.165mm-2.185mm):160-240s/100g

4# Ford Cup(φ3.97mm-4.01mm):34-40s/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.