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  • Advantages of Borosilicate Glass Microspheres in 0.03mm to 0.2mm sizing

    Borosilicate Glass Microbeads

    BSGMS 63-75 micron at 40x magnification

    High quality glass microspheres for research and development are always in high demand.  In an effort to better serve scientists Cospheric recently added a complete line of high quality borosilicate microspheres, and microbeads.

    Borosilicate glass offers  advantages over standard soda lime glass microbeads.

    • Roundness is >90%   (Soda lime >85%)
    • Density is the lowest of most glasses at 2.2g/cc  (Soda Lime 2.5g/cc)
    • Very low thermal expansion coefficient  32×10-7/°C   (for 30-300°C)   (Soda Lime:  90×10-7/°C)

    The high roundness, and low thermal expansion make borosilicate spheres an excellent candidate for use as spacers in epoxy bond lines, or other applications which require stability over a wide temperature range.

    Borosilicate glass spheres are now offered in narrow size ranges from 0.03mm to 0.2mm with greater than 90% of the particles in range.

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