MQP-B-20173-070 is an isotropic powder, designed to perform similarly to MQP-B-20076-070 while using a more cost optimized alloy system. This powder is based on a patented Nd-Pr-Fe-B alloy composition that maintains similar magnetic performance as its Nd based counterpart, MQP-B-20076-070. This material is produced by employing a proprietary rapid solidification process followed by a milling process and heat treatment.

Material Description

Powder Magnetic Characteristics1 SI CGS

Specified Residual Induction, Br ........................................883-903 mT ...........8.83-9.03 kG Energy Product, (BH)max .................................... 116-124 kJ/m3 ........14.6-15.6 MGOe Intrinsic Coercivity, Hci ........................................690-750 kA/m ...........8.7-9.4 kOe

Typical Magnetizing Field to ≥ 95% Saturation Hs ....... ≥ 1600 kA/m ........... ≥ 20.0 kOe Temperature coefficient of Br, α, to 100° C .......... -0.14 %/°C Temperature coefficient of Hci, ß, to 100° C ......... -0.44 %/°C Instrinsic Coercivity, Hc .............................................. 505 kA/m ................. 6.3 kOe Curie Temperature, Tc ................................................ 298 °C Maximum Operating Temperature2 ....................120-150 °C Maximum Process Temperature3 ..................... 225-250 °C

*Contact Magnequench to obtain up-to-date product specifications.

Physcial CharacteristicsSpecified Sieve Screen Analysis: Total > 40 Mesh (177x177μm opening) ...........< 0.1wt% Total > 60 Mesh (149x149μm opening) ............< 20wt% Total < 270 Mesh (53x53μm opening) ..............< 20wt%

Typical Density (theoretical) ....................................... 7.59 g/cm3

Apparent Density ............................................ 2.81 g/cm3

100

80

60

40

20

00 100 200 300 400

Mesh Opening Size (μm x μm)

Cumu

lative

Less

Tha

n (%)

Isotropic Powder*MQP™-B-20173-070

H(kOe)

H(kA/m)-200-400-600-800

-10.0 -5.0 0

4πM

or B

(kG)

B or

J(T)

10.0

8.0

6.0

4.0

2.0

0

1.0

0.8

0.6

0.4

0.2

0.0

-5.0-2.0-1.0

0

500

25°C

80°C100°C

120°C

150°C

180°C

Compression molded magnetρ~6.0g/cm3,BHmax~76kJ/m3

Injection molded magnetρ~5.0g/cm3,BHmax~48kJ/m3

Bonded Magnet Characteristics4

1 Properties measured at 25°C, unless otherwise specified.2 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.3 Maximum Process Temperature is defined here at <2% reduction in coercivity (i.e. structural loss) after heating powder 1 hour in air.4 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.

H(kOe)

H(kA/m)-200-400-600-800

-10.0 -5.0 0

4πM

or B

(kG)

B or

J(T)

10.0

8.0

6.0

4.0

2.0

0

1.0

0.8

0.6

0.4

0.2

0.00

0.0

Tota

l Flux

Loss

(%) -4.0

-12.0

1 10 100 1000-16.0

80°C

120°C

150°C

Time (hr.)

-8.0

B/µoH = -2

0 50 100 200

100hr

1hr

150Temperature (°C)

0.0

Tota

l Flux

Loss

(%)

-25.0

-5.0

B/µoH = -2

-10.0

-15.0

100

60

40

20

0.0

Perc

enta

ge of

Max

imum

(%)

0 1000 3000Magnetizing Field (kA/m)

2000 4000

80

5000

Br

Hci

-20.0

-5.0-2.0-1.0