What Is SEPPE Cenosphere?

Like fly ash, cenospheres are naturally occurring by-products of the burning process at coal-fired power plants. Unlike fly ash though, cenospheres are lightweight, inert, hollow spheres comprised largely of silica and alumina and filled with air or gases. Since they are inert, they are not considered a pozzolan.The color of cenospheres varies from gray to almost white and their density is about 0.4–0.8 g/cm3 , which gives them a great buoyancy.Cenospheres are hard and rigid, light, waterproof, innoxious, and insulative. This makes them highly useful in a variety of products, notably fillers. Cenospheres are now used as fillers in cement to produce low-density concrete. Recently, some manufacturers have begun filling metals and polymers with cenospheres to make lightweight composite materials with higher strength than other types of foam materials.Such composite materials are called syntactic foam. Aluminum-based syntactic foams are finding applications in the automotive sector.

Silver-coated cenospheres are used in conductive coatings, tiles and fabrics. Another use is in conductive paints for antistatic coatings and electromagnetic shielding.

Chemical Properties:

Silica: 48% – 74%

Alumina: 26% – 45%

Iron: 1.5% – 4.0%

Physical Properties:

Size: 75-400 microns

Bulk Density: 0.20-0.25 grams per cubic centimeter (g/cc)

Specific Gravity: <0.4 g/cc

Compressive Strength: ~90% survival @ 2500psi

Softening Point: 1040 degrees C

Color:Grayish white or pure white