The preparation of SEM nano powder samples usually requires the following steps:

Sample preparation

Firstly, it is necessary to choose an appropriate sample preparation method. Usually there are physical methods, chemical methods, biological methods, mechanical methods, etc. Among them, the most common methods are magnetron sputtering, chemical reduction, aerosol, etc.

Sample dispersion

It is also very important to disperse the nano powder samples evenly. Samples can be uniformly dispersed in solvents or other substances using methods such as ultrasound or stirring.

Sample preparation

According to actual needs, samples can be prepared into thin films, thin films, or other forms. Samples can usually be prepared using equipment such as centrifuges.

Grain size testing

Grain size can be tested using methods such as transmission electron microscopy or X-ray diffraction, and corresponding processing and adjustments can be made based on the test results.

SEM observation

Place the sample on the SEM specimen table for SEM observation. Better SEM images can be obtained by adjusting SEM parameters such as electron acceleration voltage, electron detector, scanning method, etc.

It should be noted that the sample preparation process involves many experimental details and precautions, which need to be handled in conjunction with specific circumstances. At the same time, caution should also be exercised when using equipment such as SEM to avoid damaging the equipment.