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Scanning electron microscope (SEM) is a key tool for modern scientific exploration of the microscopic world. It plays an irreplaceable role in scientific research and industrial applications by enabling us to gain insights into the microscopic structure of matter through high-resolution electronic imaging technology. SEM scans the surface of the sample with a high-energy electron beam to collect s...
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The reasons for peak shift in XRD (X-ray diffraction) usually involve changes in the properties of the sample itself or the influence of experimental conditions, which can be analyzed from the following aspects: 1. Sample factors 1.1 Residual stress or lattice strain Residual stress: Residual stress inside the material (such as compressive stress or tensile stress) can cause changes in the lattice...
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The major limitations on TEM performance are spherical aberration (also known as aberration), chromatic aberration, and astigmatism. The spherical aberration and chromatic aberration limit the resolution of traditional TEM. Both of these defects are inevitable when using static rotational symmetric electromagnetic fields. Ball aberration is the most important factor determining the performance of ...
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Silicon powder (including micron and nanometer scale) has a wide range of applications in various fields due to its high chemical activity, large specific surface area, and semiconductor properties. For example: 1. Electronics and Semiconductor Industry Integrated circuits and chips：High purity silicon powder (above 99.999%) is a raw material for manufacturing monocrystalline silicon and polycryst...
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The ideal characteristics of silver coated copper powder largely depend on the perfection and consistency of the silver coating at the microscopic level. High quality silver coated copper powder is a prerequisite for realizing its application value. The core goal and difficulty of the preparation process is to achieve uniform, dense, continuous, and thickness controllable silver layer coverage on ...
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First、 Physical Law Physical methods can usually prepare copper powder with high purity and good sphericity. 1.Atomization method Aerosolization method: using high-pressure inert gas, the resulting powder has low oxygen content and good sphericity, but the cost is relatively high. Commonly used in high-performance powder metallurgy and 3D printing of metal powders. Water atomization method: using ...
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The factors that affect the forming process mainly include the properties of the powder, the characteristics and effectiveness of additives, and the pressure, pressurization method, and pressurization speed during the pressing process. The properties of the powder mainly include the particle size, particle size distribution, particle shape, and moisture content of the powder. First. The influ...
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The demand for conductive paste in the photovoltaic industry and electronic packaging field is undergoing a transformation from high silver content to low silver or even silver free. Although silver powder has excellent conductivity and chemical stability, it is expensive, has limited resources, and is prone to electromigration. In contrast, copper's conductivity is second only to silver and its c...
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Although spherical silicon micro powder is spherical and has good fluidity, there are still problems of poor compatibility and difficult dispersion when used as an inorganic filler mixed with organic matrix materials. Therefore, surface modification is necessary to solve these problems. Surface modification of spherical silicon micro powder involves introducing specific functional groups or coatin...
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In transmission electron microscopy (TEM) analysis, the primary and crucial step in obtaining a high-quality image that can be interpreted reasonably is sample preparation. Inappropriate sample thickness, poor conductivity, or damage introduced during sample preparation can directly lead to abnormal electron beam penetration, image distortion, and even sample scrapping. TEM sample requirements ① T...
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