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With excellent optical, electrical and mechanical properties, graphene has important applications in materials science, micro-nano processing, energy, biomedicine and drug delivery, and is considered as a revolutionary material for the future. But the smaller the graphene powder particle size, the larger the surface area, the higher the surface energy, coordination serious shortage, make it easier to reunite in the slurry, even when grinding can do dispersed, but after will be reunited again, so wet grinding dispersion can successfully get nano graphene powder is the key to grinding and dispersion technology.

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The shape of the grinding medium is mainly spherical, columnar and irregular. In industry, irregular media tend to develop and affect their own wear and tear, which will cause obvious pollution. Therefore, in the practical teaching application research is more spherical media, cylindrical media also has some applications, without planning the working medium can be less applied.

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Magnetic grinding machine uses the power of magic magnetic field to transmit to stainless steel needle, grinding needle and grinding material; produce the workpiece with high frequency rotating flow, vibration, reversing roll, across the surface of the workpiece, the hole, internal and external teeth and the surface, concave and convex surface friction, to achieve the precision polishing effect of cleaning, removing impurities, removing burr and grinding. Because of its wide range of application, so in daily use there will inevitably be a variety of problems, then next, magnetic grinding machine manufacturers on the magnetic grinding machine a variety of problems and solutions.

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The cause of broken beads: the market popular glass beads, zirconium silicate beads and zirconia oxide beads, in terms of production process, basically electric melting method and sintering method. Beads are formed in hot air, cold air or electrolyte. If the key technical parameters are not well controlled, the following fragile beads will be produced.

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Predispersion is an indispensable process of grinding with sand mill. The materials entering the grinding machine should be uniform, such as the feed is not uniform, not only easy to cause pipe blockage, but also cause the grinding effect at the beginning of grinding, so pre-dispersion should be carried out.

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Cleaning work is a very important link in grinding, but also easy to ignore a link.

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The grinding operation should be noted: ① according to the nature of the grinding solid and the thickness of the product.

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The discoloration or stain on the sample surface may be caused by drying marks left by a residual suspension, water or alcohol resulting from insufficiently cleaning. This problem is not serious and can be easily solved by correctly identifying the stains and applying additional cleaning steps. Sample corrosion may occur when a water-based preparation method is used for corrosive samples or the sample is not drying fast enough. Recommend preparing highly corrosive samples using alcohol or oil-based methods.

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Pull-out pieces is a common type of workpiece when dealing with fragile parts. If the extract is not cast during cutting or mounting, this is usually the result of overgrinding or polishing, it can be avoided by using synchronous rotation in all lapping and polishing steps, except for the polishing step of the * *, and ensuring that the polishing cloth is softer in use.

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The key of precision lapping and polishing machine is to use a large polishing speed, remove the hazard layer on the surface of the pipe fittings, and ensure the purpose of polishing. Using thicker metal composite material, can quickly remove the hazard layer, using thinner metal composite material, polishing the hazard layer is shallow, but the polishing efficiency is generally low.

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