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Micrograph of Glass microsphere in Concrete ]] Glass microspheres are spheres of s (microns) {Link without Title} . Selected uses of solid spheres are: Calibrating measuring systems, sieve and Filter calibration, reflective markings, Abrasive s, Binder spacings. Solid spheres are used in Embolization therapy to block Capillaries , for example, to a tumor. Hollow spheres have uses ranging from storage and slow release of Pharmaceutical s and Radioactive Tracer s to research in controlled Storage and release of Hydrogen . Hollow spheres are also used as a lightweight s and deep-sea oil drilling equipment, where other types of foam would Implode . Hollow spheres of other materials create syntatic foams with different properties, for example ceramic balloons can make a light syntatic Aluminium foam. (Foams on the Cutting Edge) Glass microspheres can be made by heating tiny droplets of dissolved Water Glass in a process known as Ultrasonic spray Pyrolysis , and properties can be improved somewhat by using an acid treatment to remove some of the Sodium {Link without Title} . Microspheres are also used in composites to fill polymer resins for specific characteristics such as weight, sandability and sealing surfaces. When making surfboards for example, shapers seal the eps foam blanks with epoxy and microballoons to create an impermeable and easily sanded surface upon which fiberglass laminates are applied. REFERENCES For further details see: http://www.trelleborg.com/en/Emerson/Products--Solutions/Eccospheres-Glass-Microspheres/ EXTERNAL LINKS
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