Synthetic microspheres and methods of making same

摘要: A synthetic microsphere having a low alkali metal oxide content and methods of forming the its components are provided. The is substantially chemically inert thus suitable replacement for natural cenospheres, particularly in caustic environments such as cementitious mixtures. can be made from an agglomerate precursor that includes aluminosilicate material, fly ash, blowing agent sugar, carbon black, silicon carbide, binding agent. produced when fired at pre-determined temperature profile so to form either solid or hollow microspheres depending on processing conditions and/or used.