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Hollow Glass Sphere
Hollow glass sphere appearance is white powder with very good fluidity，main cvomponent is soda-lime borosilicate glass.Our main production are: particle size is 2 ~ 130µm with true density: 0.12 ~ 1.60g/cm ,bulk density：0.10 ~ 0.62g/cm3.And thermal conductivity：0.038 ~ 0.085W/m.K ;Highest strength: 30000 Psi.
Hollow Glass Spheres, also commonly known as hollow glass microspheres, glass bubbles, or microballoons, are microscopic, spherical fillers made from glass . They are typically composed of a water-resistant and chemically stable formulation, such as soda-lime borosilicate glass . Their defining characteristic is a thin, rigid outer wall surrounding an inner void filled with air or a thin gas, which gives them a very low density . These spheres generally range in size from a few micrometers (e.g., 2 µm) to several hundred micrometers (e.g., 250 µm) in diameter .
The unique combination of properties makes them a valuable material across numerous industries. Their spherical shape and low density allow them to act as a lightweight filler, significantly reducing the weight of end products . The hollow structure provides excellent thermal and acoustic insulation, while the glass composition offers high chemical resistance, fire retardancy, and a high strength-to-weight ratio .
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