Summary of detection performance and detection method of metal powder

Metal powder is a fine metal powder, usually made by chemical reduction of metal, mechanical grinding or atomization, etc. They have the characteristics of many metals, such as high electrical conductivity, high thermal conductivity, corrosion resistance, high temperature performance, etc. Metal powders can be used in a variety of applications, such as the preparation of metal materials in electronic devices, automotive, aerospace, construction, metallurgy, etc., and added to coatings, paints, inks, rubber, etc., to increase their electrical conductivity, thermal conductivity, corrosion resistance, etc. In addition, metal powder is also widely used in powder metallurgy, 3D printing, thermal spraying and other fields.

Performance of detection
The following is a table of common properties of metal powder to be detected and the detection methods:

PerformanceDescriptionMethod of detection
Particle size distributionSize and distribution of metal powder particles

Laser particle size analyzer, microscope

Chemical compositionThe content and proportion of each element in the metal powderX-ray fluorescence spectroscopy, ICP-MS, chemical analysis
Purity of substancePurity and impurity content of metal powderICPOES, thermogravimetric analysis, GC-MS
Density of densityDensity and porosity of metal powderBuoyancy method, mercury injection method, microscope
Magnetic propertiesMagnetic properties of metal powdersVibration sample magnetometer, hysteresis loop test
Properties of surfaceSurface morphology, chemical reaction and chemical composition of metal powderScanning electron microscopy, X-ray photoelectron spectroscopy, chemical analysis

Summary of detection performance and detection method of metal powder

We remind you: different metal powders may require different detection methods, the specific choice of which method needs to be determined according to the nature of the sample and the required detection accuracy.

Specific detection method
The following are detailed instructions on metal powder testing:

Particle size and particle size distribution: The particle size and particle size distribution were measured by laser particle size meter, dynamic light scatterer and other instruments.

Density: measured by hydrometer or gas specific gravity method.

Thermogravimetric analysis: Thermogravimetric analyzer (TGA) or differential thermal analyzer (DSC) can be used to test the thermal stability and thermal decomposition temperature of materials.

Chemical composition: Commonly used methods are X-ray fluorescence spectroscopy (XRF) and atomic absorption spectroscopy (AAS).

Summary of detection performance and detection method of metal powder

Surface properties: Commonly used surface analysis methods include scanning electron microscopy (SEM), transmission electron microscopy (TEM) and atomic force microscopy (AFM).

Magnetism: The magnetic properties of materials are tested through devices such as superconducting quantum interferometers (SQUID) and Hall effect meters.

Electrical conductivity: Instruments such as four-probe resistance testers can be used to test the electrical conductivity of materials.

Optical properties: It can be used to test the absorption and transmission spectrum of materials, as well as the optical properties such as fluorescence spectrum by UV-Vis spectrophotometer.

Mechanical properties: Commonly used mechanical properties testing methods include tensile, compression, bending and other experiments, as well as materials testing machines and other instruments to test the mechanical properties of materials.

These test methods need to be selected according to the specific types and properties of metal powder, and combined with a variety of means for comprehensive analysis.

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