MQP-B-20172-070 is an isotropic powder, designed to replace MQP-B-20052-070, is suitable for the manufacture of bonded magnets. This powder is based on a patented Nd-Pr-Fe-B alloy composition that will help you to realize a significant cost advantage if you choose to switch. MQP-B-20172-070 also maintains similar magnetic performance as its Nd based counterparts. 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 ........................................860-880 mT ...........8.60-8.80 kG Energy Product, (BH)max .................................... 116-124 kJ/m3 ........14.5-15.6 MGOe Intrinsic Coercivity, Hci ........................................800-860 kA/m ........10.0-10.8 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 .............................................. 540 kA/m ................. 6.8 kOe Curie Temperature, Tc ................................................ 298 °C Maximum Operating Temperature2 ....................150-180 °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) ............< 25wt% Total < 270 Mesh (53x53μm opening) ..............< 20wt%

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

Apparent Density ............................................ 2.87 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-20172-070

H(kOe)

H(kA/m)-200-400-600-1200

-15.0 -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

-2.5-7.5-10.0-12.5

-800-1000

180°C

150°C

120°C

80°C

25°C

Compression molded magnetρ~6.0g/cm3,BHmax~75kJ/m3

Injection molded magnetρ~5.0g/cm3,BHmax~47kJ/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)-200-400-600-1200

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

(%) -3.0

-12.0

1 10 100 1000-15.0

80°C

120°C

150°C

Time (hr.)

-6.0

B/µoH = -2

0 50 100 200

100hr

1hr

150Temperature (°C)

0.0

Tota

l Flux

Loss

(%)

-8.0

-2.0

B/µoH = -2

-4.0

-6.0

100

60

40

20

0

Perc

enta

ge of

Max

imum

(%)

0 1000 3000Magnetizing Field (kA/m)

2000 4000

80

5000

Br

Hci

-15.0 -5.0-10.0

-800-1000

-9.0

-5.0-2.0-1.0