Everything about Microspheres
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  • High Density Glass Microspheres

    Barium Titanate Glass microspheres are high density solid glass spheres.  At a Density of 4.5g/cc these solid glass spheres can be used for many scientific applications where high density and optical clarity is needed.  In addition to high density they also offer an index of refraction of more than 1.9.

    Bulk quantities are available in 30-100um and 0.3-1.0mm size ranges.

    For experiments requiring the highest precision the beads can be purchased in classified grades offering >90% of the spheres within a specific size range.  Standard Sizes include the narrow ranges below.

    38-45um, 45-53um, 53-63um, 63-75um, 75-90um, 90-106um, 0.25mm-0.3mm, 0.3mm-0.35mm, 0.36mm-0.42mm, 0.43mm-0.5mm, 0.5mm-0.6mm, 0.6mm-0.7mm, 0.71mm to 0.85mm, and 0.85mm to 1.0mm.

    Product pricing and availability can be found under Cospheric’s BTGMS (barium titanate glass microspheres)

  • High Index of Refraction Retroreflective Glass Microspheres

    Retro-reflective MicrospheresBarium Titanate Glass Microspheres are excellent for use as a functional retro reflective additive  to paints and coatings.  Spheres with sizes of about 50 micron (~0.002 inches) mean diameter provide a small enough size for most coatings while offering a large enough size to reflective a significant amount of light.  Barium Titanate Glass Spheres are offered in both partially aluminum coated retro-reflective version for addition into transparent coatings, or as uncoated glass spherical powder for uses in colored paints.

    Barium Titanate Glass microbeads offers one of the highest indexes of refraction with an IR greater than 1.9 which provides high intensity retroreflectivity from these spheres.

    For those applications calling for a high density filler, barium titanate glass spheres offer a density of 4.5g/cc, that is almost double that of the more common soda lime glass spheres.   In addition to a high density, barium titanate glass spheres have a hardness of about 55-65 on the Gardner scale and a crush strength of over 30,000 psi (207 Mpa) making these spheres very durable in high wear environments.

    The spheres offered by Cospheric as product ID:  BTGMS (uncoated ) and P2453BTA (aluminized) are produced in the USA, and are Lead free.