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:
| Performance | Description | Method of detection |
|---|---|---|
| Particle size distribution | Size and distribution of metal powder particles | Laser particle size analyzer, microscope |
| Chemical composition | The content and proportion of each element in the metal powder | X-ray fluorescence spectroscopy, ICP-MS, chemical analysis |
| Purity of substance | Purity and impurity content of metal powder | ICPOES, thermogravimetric analysis, GC-MS |
| Density of density | Density and porosity of metal powder | Buoyancy method, mercury injection method, microscope |
| Magnetic properties | Magnetic properties of metal powders | Vibration sample magnetometer, hysteresis loop test |
| Properties of surface | Surface morphology, chemical reaction and chemical composition of metal powder | Scanning 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.