The word Cenosphere is derived from two Greek words Kens (hollow) and Sphaira (sphere).

Cenospheres are hollow ceramic microspheres found in fly ash, a natural by-product of coal combustion during the generation of electric power. Small and hollow, microspheres are used as fillers or functional extenders in the manufacture of plastics, paints, resins; light weight aggregates for cement, ceramics and other construction products. Because Cenospheres often replace mined materials, they can significantly lower production costs. Simultaneously, cenosphere can benefit finished product properties by increasing durability and better sound proofing. Too, as material recycled from fly ash, cenosphere are environmentally friendly and help to preserve natural virgin fillers.

They are made up of inert silica, iron and alumina. Cenospheres have a size range from 1 to 300 microns with an average compressive strength of 3000+ psi.. Colors range from white to dark gray. They are also referred to as microspheres, hollow spheres, hollow ceramic microspheres, micro balloons, or glass beads.

The spherical shape of cenosphere improves flow ability in most applications and provides a more even distribution of the filler material. The natural properties of cenosphere make it possible to use them either in dry or wet slurry form. Cenospheres are easy to handle and provide a low surface area-to-volume ratio. Due to their inert properties, they are not affected by solvents, water, acids, or alkalis. Cenospheres are 75% lighter than other minerals currently used as a filler or extender.

Cenosphere India Pvt. Ltd., an associate company of Gimpex Pvt. Ltd had started processing and selling cenosphere from the year 2004. it is registered as a 100% export oriented unit (EOU) and exporting Cenosphere to USA, EUROPE and MIDDLE EAST Countries. Cenospheres are light weight, inert, hollow speres of Silica and Alumina filled with gas which naturally occurs in the combustion of coal. The properties are same as manufactured sphered products.

The mainly advantages of using cenosphere are

  • Reduced Raw Materials Cost
  • Improved Flow ability
  • Reduced Resin Demand
  • Improved Insulation Values
  • Reduced End Product Weight
  • Resistant to Resin Absorption (Low Shrinkage)
  • Thermal Stability

Applications of Cenosphere

  • Cementing – Driling Mud & Chemicals, Light Cement Boards
  • Plastics – All Types of Moulding, Nylon, Low Density Poyethylene and Polypropylene
  • Construction – Speciality Cements and Mortars, Roofing Materials, Acoustic Panels, Coatings
  • Automobiles - Fabrication of composite polymeric putties.
  • Ceramics – Refractories, Tiles and Fire Bricks

Click Here to go to Cenosphere India Website

For any trade related enquiries please contact Mr. Sharad Agarwal at