The meanings of metamorphic treatment, grain refinement, and primary phase refinement or morphology change are different, and sometimes the term metamorphic treatment is used to summarize these contents. (1) Deterioration treatment. For simple binary Al Si alloys, such as Z102 containing 11%~13% Si, it is a typical eutectic alloy. Its organization consists of coarse needle shaped (should be layere...
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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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With the rapid development of modern industry and technology, different industries have increasingly high performance requirements for powder materials. In addition to having extremely low impurity content, fine particle size, and narrow particle size distribution, powder materials also need to have a certain particle morphology. Spherical powders have been widely used in high-end industries such ...
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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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Why do nanoparticles aggregate? 1.Surface free energy driven mechanism Nanoparticles have a larger specific surface area and unsaturated surface atoms, leading to an increase in surface free energy. Multi particle contact can reduce the total surface area, release interfacial energy, and thus lower the system's free energy. This trend of energy minimization is the intrinsic thermodynamic driving f...
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Powder surface modification changes the surface state of particles through physical or chemical means, with the core being to break the agglomeration force between particles. When the particle size of the powder decreases to the micrometer or nanometer level, the surface energy sharply increases, and van der Waals forces, hydrogen bonds, and other gravitational forces cause the particles to sponta...
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In today's paint and plastic industry, which pursues high performance, lightweight, and environmental protection, traditional fillers and reinforcing agents have long been unable to meet the demands of the high-end market. The emergence of nano high-purity magnesium oxide, with its triple advantages of "filling+reinforcement+functionalization", brings performance leaps to coating and plastic produ...
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