Jun . 202005

What is hollow glass microsphere

TBM hollow glass microsphere is small ball-shaped hollow material with gas inside,which is a stable hollow particle with special performances and has advantages of low weight, large volume, low thermal conductivity and great dispersity, flowability & stability. Furthermore, it has excellent performance such as insulation, self-lubrication, sound and heat insulation, nonabsorbent, corrosion resistance, radiation protection and non-toxic.

Its development started in the 1950s, and it has been used as a new type of filling material in foreign countries since the 1970s, and has been applied in various fields. China began to study hollow microspheres and their application technology only in the 1980s.

Hollow glass microspheres can generally be divided into two types: one is floating beads, which are extracted from fly ash produced by burning coal during the power generation process of thermal power plants, and their components are mainly SiO2, Al2O3 and other metal compounds; The other is artificially synthesized hollow glass microspheres. The composition, density, and various other physical and chemical properties of the microspheres can be controlled by adjusting the formula and process parameters. The application range is wide. It can be used as an additive for composite foam or as a special functional material.


  • Hollow glass microspheres have a hollow structure with low density and low thermal conductivity, which can not only greatly reduce the density of the composite material, but also give it excellent thermal insulation and sound insulation properties. For example, the National Aeronautics and Space Administration's (NASA) Research Center uses hollow glass microspheres as a filler to prepare multilayer thermal insulation materials. Not only has excellent thermal insulation performance, but also can improve the vacuum maintenance of the material system and reduce maintenance costs.
  • Hollow glass microspheres are spherical and have the advantages of ideal fillers with low porosity and less bead absorbing resin. They have little effect on the viscosity and fluidity of the polymer matrix, and also make the stress distribution of the final product reasonable, especially along the surface Uniform distribution, improve the rigidity, hardness and dimensional stability of composite materials.
  • Hollow glass microspheres have high strength. Hollow glass microspheres appear to be some flowable powder to the naked eye, but are essentially a thin-walled sealed shell sphere. The shell wall is made of glass or ceramic material and has a high strength, which has a certain reinforcing effect on the composite material.

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