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Spacer-grade microspheres are highly spherical and free of odd shapes and angular
particles. Their high sphericity, close size tolerances and high mechanical strength and
chemical durability make them ideal for all applications that require these high-grade
Spacer-grade microspheres are presently used in gas plasma displays, automotive mirrors,
electronic displays, flip-chip technology, filters, sporting goods equipment, calibration
standards and other applications.
Tightly sized solid glass spheres are used in adhesives as a bond-line spacer. Glass
spheres with high crush strength are incompressible and are added in small amounts to
adhesives and resins to define the bond-line thickness.
Bondline spacer grade solid soda lime glass microspheres are available with tight particle size ranges to achieve bondline thickness (gap) from 10micron (0.01mm) to 500micron (0.5mm). Bondline spacers are supplied as a dry powder. We recommend using ~5% of spheres by volume (~10% by weight) in epoxy bondlines.
Other size ranges of soda lime glass spherical particles are also available in broad sizes from 10um to 7.1mm. If you don't see the size you need below please contact us and we will make a recommendation for an in-stock product and be able to give you pricing for the exact custom size you need.
Particles in Size Range: > 95%
Spherical Particles: >90%
Density: 2.4-2.6, ~2.5g/cc Nominal
Index of Refraction: ~1.5
Softening Temperature: ~650C
Poly(Methyl Methacrylate) PMMA Acrylic Microspheres and Spheres 1.2g/cc - 1um to 3.5mm
Monodisperse Silica Microspheres 2.0g/cc, CV<10% - 166nm to 9.2um
Soda Lime Glass Solid Polished Spheres 2.5g/cc - 0.7mm to 10.0mm
Soda Lime Solid Glass Microspheres 2.5g/cc - 1um to 4400um (4.4mm)