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P2453BTA metallized spheres product line consists of solid, barium titanate glass microspheres with a 40-50 micron typical mean diameter, a tight particle size distribution, with an upper sphere diameter of less than 100 micron. The microspheres incorporate a hemispherically coated aluminum shell which provides maximum retroreflection. In bulk, these metallized glass spheres appear as a grey powder. Under an optical microscope, each individual microsphere displays a partial aluminum coating.
Also see other Barium Titanate Glass Spheres.
P2453BTA is a product of Prizmalite distributed through Cospheric LLC.
The spheres are offered in dry powder form with the following coating options:
Guidelines for Using Retroreflective Spheres
Coating: Half-shell Aluminum
Core: Solid Barium Titanate Glass
Sphericity: >90% of particles are sphericalDensity: 4.1-4.5g/cc, exact density varies by lot and is specified for the purchased lot of material
Index of Refraction: ~1.9
Appearance: Grey powder
Hardness: 55 – 65 on Gardner Scale
Crush Strength: 30,000 psi
Barium Titanate Solid Glass Microspheres 4.1-4.4g/cc - 5um to 1000um (1mm)
Conductive Gold-Coated Solid Barium Titanate Glass Microspheres 4.49g/cc - 30-100um
Conductive Silver-Coated Soda Lime Solid Glass Microspheres - 1um to 1mm
Aluminum-Coated Solid Barium Titanate Glass Microspheres 4.2g/cc - 30-100um