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CENOSPHERES GREY  GRAY

A  CENOSPHERE  or Microsphere is a light weight, inert, hollow sphere made largely of silica and alumina and filled with air or inert gas. The color of microspheres varies from grey (or gray) to almost white, with a typical size between 5 and 500 microns.

Grey cenospheres naturally occur more frequent than white cenospheres and are used in many applications as a light weight aggregate in for example concretes, resins, plastics, paints, coatings, bricks, rubbers, foils and fillers.

Grey cenospheres have, compared to  WHITE CENOSPHERES  , a lower Al2O3, higher SiO2 and higher Fe2O3 content. Generally grey microspheres are used in applications, where ‘resistance to higher temperature’ and color are less important. A typical chemical specification for grey microspheres is as follows:      

typical analysis ofAl2O3 %SiO2 %Fe2O3 %K2O %Na2O %
– grey cenospheres –20 – 30 55 – 653 – 61 – 41 – 2


Plomp Mineral Services is able to supply microspheres based on specific gravity, size distribution, color, chemistry, or a combination of these criteria to meet your specific needs. 
Various grades of grey or light grey microspheres in various types of packaging can be offered.

Plomp Mineral Services is fully  REACh COMPLIANT  and has registered all uses and applications.

Are you interested in our product? Please feel free to  CONTACT  us!
Product DataSheets and Material Safety DataSheet will be sent on request.