CENOSPHERES are hollow ceramic microspheres found in flyash, a natural by-product of coal combustion power plants during the generation of electric power. They are used as functional fillers or extenders in plastics, paints, composites, thermal coatings, epoxies, light weight aggregate for cement, ceramics and many other construction products. Cenospheres often replace mined materials and can significantly lower production costs.

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Cenospheres, derived from the inferno of coal-fired power plants, have been used for more than 30 years to improve the qualities of many manufactured products.

Cenospheres are hard, inert, hollow, free flowing alumino-silicate microspheres. They are used to replace minerals and resins where the benefits may be as diverse as weight reduction, reduced friction, reduced shrinkage; improved insulation, fire resistance, enhanced flow characteristics sharper surface finish and easier application.

Lowers Viscosity

Cenospheres are comprised of silica, iron and alumina, and have a particle size distribution from 1 to 600 microns with an average compressive strength of over 3000 psi. They are also referred to as microspheres, hollow spheres, hollow ceramic microspheres, microballoons, microbubbles or glass beads.

Hardness and Abrasion Resistance

Cenosphere applications offer many benefits over mined materials, primarily cost and weight reduction. Of their many uses, microspheres are used as light-weight aggregate in oil well cements, sound proofing, thermal insulation, lubricity, stealth applications and are even used by NASA in the nose of the Space Shuttle and coatings that create a 'torturous path' in many space vehicles.

Cenospheres are chemically inert, and exempt from classification as hazardous waste as determined by the United States Environmental Protection Agency. In addition they are considered "re-claimable" under the Resource Conservation and Recovery Act (42 USC §§ 6901-699-15).

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