MQP™-8-5-20159-070 Isotropic Powder
*
Material Description
MQP-8-5-20159 is a low cost isotropic powder designed for the manufacture of bonded magnets. Because Ce comprises 80% of
the total rare earth content in MQP-8-5-20159, this powder grade allows for greater cost stability. Its relatively low Br enables
MQP-8-5-20159 to be well-suited for replacing ferrite based applications which typically require magnetic properties of 5MGOe
or lower. MQP-8-5-20159 is produced by employing a proprietary rapid solidification process followed by a milling process and
heat treatment.
SI
CGS
Specified
Residual Induction, Br .......................................665-685
Energy Product, (BH)max ........................................ 59-69
Intrinsic Coercivity, Hci .......................................380-440
mT ...........6.65-6.85
kJ/m3 ............7.4-8.7
kA/m ...........4.7-5.5
kG
MGOe
kOe
Typical
Magnetizing Field to ≥ 95% Saturation Hs ....... ≥ 1115
Temperature coefficient of Br, α, to 100° C .......... -0.28
Temperature coefficient of Hci, ß, to 100° C ......... -0.43
Instrinsic Coercivity, Hc .............................................. 325
Curie Temperature, Tc ................................................ 186
Maximum Operating Temperature2 ....................100-110
Maximum Process Temperature3 ..................... 175-200
kA/m ........... ≥ 14.0
%/°C
%/°C
kA/m ................. 4.1
°C
°C
°C
kOe
4πM or B(kG)
-10.0
10.0
kOe
H(kOe)
-5.0
0
-1.0
-2.0
-5.0
1.0
8.0
0.8
6.0
0.6
4.0
0.4
25°C
80°C
2.0
0.2
100°C
120°C
0
-800
-600
-400
H(kA/m)
150°C
-200
0
0.0
Physcial Characteristics
Typical
Sieve Screen Analysis:
Total > 40 Mesh (177x177μm opening) ...........< 0.1wt%
Total > 60 Mesh (149x149μm opening) ............< 25wt%
Total < 270 Mesh (53x53μm opening) ..............< 12wt%
Density (theoretical) ....................................... 7.66 g/cm3
Apparent Density ............................................ 2.70 g/cm3
100
Cumulative Less Than (%)
Specified
80
60
40
20
0
*Contact Magnequench to obtain up-to-date product specifications.
0
100
200
300
400
Mesh Opening Size (μm x μm)
500
B or J(T)
Powder Magnetic Characteristics1
Bonded Magnet Characteristics4
4πM or B(kG)
-1.0
0
-2.0
0.8
6.0
0.6
4.0
Injection molded magnet
ρ~5.0g/cm3,
BHmax~28kJ/m 3
-600
-400
H(kA/m)
0.0
-5.0
-5.0
Total Flux Loss (%)
1hr
-10.0
-15.0
100hr
-20.0
0
50
100
150
Temperature (°C)
200
0
120°C
-10.0
-15.0
-20.0
150°C
-30.0
B/µoH = -2
1
10
Time (hr.)
100
Percentage of Maximum (%)
100
80
2
3
4
Hci
Br
60
40
20
0.0
0
1000
2000
3000
4000
Magnetizing Field (kA/m)
0.0
80°C
-25.0
B/µoH = -2
0.2
-200
0.0
-25.0
0.4
Compression molded magnet
ρ~6.0g/cm 3,
BHmax~44kJ/m 3
0
-800
1
1.0
8.0
2.0
Total Flux Loss (%)
-5.0
5000
Properties measured at 25°C, unless otherwise specified.
The Maximum Operating Temperature for a magnet made from this powder is dependent upon the specific application, the type of magnet, and
magnet geometry. Contact our Application Engineers for more information.
Maximum Process Temperature is defined here at <2% reduction in coercivity (i.e. structural loss) after heating powder 1 hour in air.
These properties are typical at 25°C and are representative only. Magnet properties are dependent upon powder loading and magnet
manufacturing conditions. Contact our Application Engineers for information about Magnequench magnet products.
* This powder, the products that are made there from, and its manufacturing processes are subject to one or more of the following United States
Patents: 6,183,572; 6,478,890; 6,527,875; 6,855,265; 6,979,409; 7,087,185; 7,144,463.
1000
B or J(T)
H(kOe)
-5.0
-10.0
10.0