Magnetic Powder Testing: From Raw Powder to Full Results

Discover how structured magnetic powder testing helped generate complete magnetic properties by combining Fluxmeter and DC Electromagnet testing with proper sample preparation.

The material received for testing was in powder form, and the objective was to determine key magnetic properties including Remanence (Br), Saturation, Coercivity (Hc), and Maximum Energy Product (BHmax). However, due to the absence of a defined shape and magnetic path, powder samples cannot produce a complete B–H hysteresis loop required for measuring all magnetic parameters. Therefore, a suitable sample preparation method and testing approach were required to accurately characterize the magnetic properties of the material.

The Challenges

Remanence Measurement

Br cannot be measured directly in powder form.

BHmax Calculation

BHmax can only be calculated from B–H curve, not from loose powder.

Testing Method Selection

Different magnetic properties require different testing methods.

Coercivity Measurement

Hc requires a magnetized solid sample for accurate testing.

Powder Material Form

Loose powder cannot generate a proper B–H loop for magnetic measurement.

The powder material was converted into a compact pallet using pressing method to create a defined magnetic path.

Results:

Complete Magnetic Characterization

All required magnetic properties measured

Accurate B–H Curve Generated

Enabled calculation of BHmax

Proper Testing Method Established

Standard method for powder testing

Reliable Data Generated

Helps in material evaluation and application

This method is important for materials used in:

Ferrites

Motors

Inductors

Sensor

Magnetic Component

We successfully completed magnetic powder testing by converting the powder into a compact pallet and performing Fluxmeter and DC Electromagnet testing to measure Saturation, Br, Hc, and BHmax. This method provided accurate and complete magnetic characterization of the material.