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Manganese dioxide, also known as "manganese peroxide", "black manganese oxide", is a black orthorhombic crystal or brown-black powder, and there are many variants. Insoluble in water, nitric acid, cold sulfuric acid and acetic acid, soluble in cold and concentrated hydrochloric acid to generate unstable light brown-green MnCl4, which is heated and reacted with concentrated hydrochloric acid to rel...
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Supercapacitor is a new type of energy storage element, which is widely used in starting power supply, pulse power supply, military, mobile communication device, computer and electric vehicle due to its advantages of large capacity, fast charging and discharging of large current, and long cycle life. and other research fields. According to the different energy storage mechanisms, supercapacitors c...
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In order to obtain the correct data of the primary particle size, it is often necessary to open the agglomerated particles in the particle size test to form a particle monomer and keep it uniformly dispersed in the medium. This operation is called "dispersion". The requirement of the laser particle size analyzer for the dispersion system is "dispersion without segregation". Dispersion techniques a...
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Particle size: The size of the particles is called particle size, usually the particle size of spherical particles is expressed by diameter/particle size, and the particle size of cubic particles is expressed by side length. Particle size is the diameter of a particle. However, most of the particles in practice are irregular. Therefore, in order to describe the size of the particles more convenien...
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Nanoparticles have a special surface structure, which lacks adjacent coordinating atoms on the surface, and has high activity, so it is easy to agglomerate. Due to the strong self-absorption property among nanomaterial particles, the agglomeration of nanoparticles is inevitable. Aggregates can be divided into two types: hard agglomerates and soft agglomerates. The formation process of agglomerates...
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Chemical modification and dispersion is to use the surface groups of nanoparticles to form chemical bonds with reactive organic compounds. The nanoparticles are soluble in organic media due to the branched chains or groups of organic compounds on the surface. dispersion in. There are usually two ways of chemical modification: one is to use the end groups of macromolecules to chemically react with ...
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In recent years, silver coated copper powder has been widely used, not only as the electrode of chip electronic components, but also in the fields of catalyst and electronic paste. At present, the electronic paste used in my country is basically micron-level pure silver powder, which is expensive and mainly imported. Micron sterling silver powder has the problem of particle sedimentation in the la...
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The displacement reaction method is a common process for processing silver-coated copper powder. Because the surface activity of copper powder is very large, it is easy to oxidize, so it must be pretreated before coating the copper powder. 1. Put the required amount of copper powder into the pretreatment tank, and then wash with 15% 30% dilute sulfuric acid to keep the pH of the solution at 3 2. W...
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The chemical reduction method of silver coated copper powder refers to the process of using a reducing agent to reduce the ions in the main salt to elemental form and depositing on the surface of the substrate with autocatalytic ability in a metastable solution system. When the reducing agent is oxidized on the catalytically active surface, free electrons are generated. These free electrons can re...
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When using copper powder as the conductive filler to prepare the conductive ink, what is the appropriate amount of copper powder added, and what specific effect does the added amount of copper powder have on the conductive performance of the conductive ink. Printed electronics is an advanced electronics manufacturing technology that has emerged and popularized in recent years. Conductive ink is a ...
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