ResourceSeparations
Nano Scale Grinding with High Energy Ball Mills
2 Apr 2011In this application note, planetary ball mills are used to grind aluminum oxide to produce particles in the nanometer range. Conditions are optimised for this “top down” method and resulting particle sizes are analysed. There are various methods to produce nano particles. The “bottom up” technique involves synthesizing the particles from atoms and molecules. With the “top down” method, the particles are reduced to nanometer size by grinding. A suitable tool for this method is a planetary ball mill, such as RETSCH’s PM 100, PM 200 or PM 400, which provides the necessary energy input for grinding down to the nanometer range.
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Sample PreparationSample preparation can improve the quality and speed of separation techniques. Products to assist sample preparation include filtration equipment, evaporators, membranes and sieves.Shakers, Stirrers and MixersShakers, stirrers and mixers are used for mixing liquids and solids for laboratory applications. There is a wide range of laboratory mixing equipment available, including magnetic stirrers, orbital shakers, linear shakers, microplate shakers, 3D gyratory rockers, rotators & vortexers. Additional platforms and clamps can also be attached to shakers to increase capacity. Find the best shakers, stirrers and mixers in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.CentrifugesCentrifuges are used to separate particulates suspended in a liquid via the application of a centrifugal force including cells, macromolecules, nanoparticles and precipitates. Centrifuges come in three sizes: microcentrifuges, benchtop and floor-standing centrifuges, depending on the volume and number of samples that require separation. When choosing a centrifuge, consider its maximum separation power indicated by its relative centrifugal force (RCF) value. Low force centrifuges reach a maximum RCF of 8,000 g, high-force centrifuges can reach maximum RCF values of 80,000 g. For extremely high forces, consider ultracentrifuges (up to 800,000 g). Refrigerated and vacuum centrifuges also known as concentrators are available for more specialized applications. A range of volumes are available for centrifuge tubes and microfuge tubes, depending on sample sizes. Find the best centrifuges in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.