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45-53um Borosilicate GlassBorosilicate Glass Microspheres
Clear Solid Glass Spheres
  • Supplied as dry powder
  • Material: Borosilicate glass
  • Degree of Roundness >90%
  • Particles in range >90%
  • Density: ~2.2g/cc
  • Index of refraction: 1.48-1.49
  • Particle sizes: 20um to 212micron
  • Crush Strength: >27,000psi  (90% survival)
  • Information on Borosilicate Glass
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Classified Grades of Borosilicate Solid Glass Microspheres:
> 90% spherical

Size
Range		 Product ID

In Size
Range
 10g Vial
(Stock)
20-27um BSGMS 20-27um - 1g 
 >90%
(1gram)
27-32um BSGMS 27-32um
 >90% $184
32-38um BSGMS 32-38um
 >90% $169
38-45um BSGMS 38-45um
 >90% $138
45-53um BSGMS 45-53um >90% $125
53-63um BSGMS 53-63um >90% $125
63-75um BSGMS 63-75um >90% $125
75-90um BSGMS 75-90um >90% $125
90-106um BSGMS 90-106um >90% $125
106-125um BSGMS 106-125um >90% $125
125-150um BSGMS 125-150um >90% $125
150-180um BSGMS 150-180um >90% $145
180-212um BSGMS 180-212um >90% $175
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Clear Solid Glass Borosilicate Microspheres 30um - 10g
BSGMS - Borosilicate Glass Spheres - Classified Grades

Borosilicate glass spheres, >90% spherical, >90% in particle size range.
Ranges of sphere diameters 27-32um, 32-38um, 38-45um, 45-53um, 53-63um, 63-75um, 75-90um, 90-106um, 106-125um, 125-150um, 150-180um, 180-212um
   
 
Chemical Composition (by weight):
  • Silica (SiO2)....................70-80%
  • Boron Oxide (B2O3)........10-15%
  • Sodium Oxide (Na2O).......5-10%
  • Aluminum Oxide (Al2O3)...2-5%
Physical Properties:
  • Specific Gravity.............................2.2g/cc
  • Bulk Density.................................1.2g/cc (71lbs/ft3)
  • pH in water @25°C:......................7.0
  • Softening Temperature..................830°C
  • Index of Refraction........................1.47-1.48(nd)
  • Coefficient of Thermal Expansion...32x10-7/°C (30-300°C)
  • Crush Strength (90% Survival).......27,210 psi using Carver Press