Glass microspheres, also known as Hollow Glass Microspheres (HGM), are a type of specially processed lightweight, non-metallic, multifunctional material. They are primarily composed of borosilicate and are produced through high-temperature sintering at temperatures ranging from 700 to 800℃. With a particle size typically between 10 and 250 micrometers and a wall thickness of 12 micrometers, these microspheres are micron-sized and exhibit excellent properties such as lightweightness, high strength, thermal insulation, and corrosion resistance.

Glass microspheres have a wide range of applications due to their unique properties. They are often used as fillers in materials like fiberglass, where they can reduce weight, enhance rigidity, impact strength, and bending strength, while also improving chemical stability and reprocessability. Additionally, they can replace expensive resin components, lowering production costs. In composite materials for repairs, such as putty, they provide lightweight, strong adhesion, easy application, low shrinkage, and good stability.

Overall, glass microspheres are a versatile and valuable material with significant potential for further development and application in various industries.