BGRIMM MAGNETIC MATERIALS &TECHNOLOGY CO.,LTD.

BMS-6 Strontium Ferrite Coarse

Coarse Powder for wet press Sintered Magnet

1.Introduction of Product

BMS-6 is a Sr-Ferrite coarse powder for wet press sintered anisotropic strontium ferrite magnet.

2.Typical Powder Properties

Chemical Composition SrFe12O19

Average Partical Size 3.0-7.0µm

Moisture ≤0.5%

3.Wet Press Sintered Magnet Properties

Property Units Values

Residual Induction(Br) Gs ≥4090

Coercive Force(bHc) Oe ≥3050

Intrinsic Coercive Force (iHc) Oe ≥3250

Peak Energy Product (BHmax) MGOe ≥3.70

Shrinkage(⊥-Orientation) % 12.5±1.0

4. Quality Testing Conditions

Average Particle Size: Fisher Sub-Sive Sizer

Blinder Additive: Calcium Carbonate 1.4 wt%

Silica 0.3wt%

Boric Acid 0.2wt%

Aluminum Oxide 0.3wt%

Molding process: Wet process molding after fine grinding

Magnetize Field: 8000Oe

Forming particle size: 0.7-0.8µm

Compact Pressure: 500 kg/cm2

Green Density: 3.30±0.1 g/cm3

Sintered Condition:

Maximum temperature 1250±10 ℃

Keeping time 120 min

5. Inspection Records for User

1)Name of material

2)Lot No.

3)Delivered Weight

4)Moisture

5)Magnetic Properties (under test condition)

6)Shrinkage (under test condition)