CHEMICAL COMPOSITION FOR MAKING HOLLOW SPHERICAL GLASS PARTICLES, CHARACTERIZED BY HIGH COMPRESSION STRENGTH

摘要

A hollow spherical glass particle, comprising aluminum oxide Al 2 O 3 , silicon dioxide SiO 2 and at least one metal oxide, wherein the metal oxide is selected from the group consisting of alkali metal oxides and alkaline earth metal oxides, wherein the ratio of aluminum atoms to alkali metal atoms is about 1:1 and the ratio of aluminum atoms to earth alkali atoms is about 2:1, with the proviso that the hollow spherical glass particle is free of boron.