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

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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Silica Microspheres – 6 micron mean Diameter

Properties

Silica is a chemically stable inorganic synthetic material.   It has the benefit of providing no irritation to human skin.  Silica is essentially transparent, colorless and promote a high degree of slip in products.  The skin feel is generally lubricious in nature.   Spherical silica imparts exceptional lubricity to loose and pressed powder products. The effect is increased ‘play time’ and a luxurious feel.  Spherical products with mean particle size between 3 to 10 micron will scatter light on the surface of its particle, ie which are transparent, but give natural coverage.

• Properties :
  - Hollow and porous spherical powder
  - Uniform size distribution
  - Excellent dispersibility
  - Good oil absorbancy
  - Good fluidity
• Applications :
  - Emulsion products
  - Makeup products
  - Anticaking agent
  - Additive carrier and perfume carrier
• Available with Optional Silicone Coating (Dimethylpolysiloxane)
  - Increases Hydrophobicity
  - Transparent
  - Resistant to acid, alkalis, UV and moisture

Silica Microspheres are available for purchase at Cospheric in R&D quantities or bulk.

Monodisperse – Spacer Grade Microspheres

SLGMS 27-30um 40x

Scientists are constantly looking for narrower particle size distributions (monodispersed) of microspheres to help increase the consistency and correlation between theoretical models and verification experiments.  In an effort to fill the increasing demand for these particles Cospheric has launched a new line of spacer grade microspheres.

Monodisperse microspheres are currently offered in diameters of:   21-24um, 23-26um, 25-28um, 27-30um, 29-32um, 31-34um, 33-36um, 35-38um, 37-40um, 50-53um

Manufactured with Soda Lime Glass, monodisperse spheres are excellent for spacing epoxy bond lines that will experience high temperature.

• Degree of Roundness: >90%
• Particles in Size Range: >95%
• Density: ~2.52g/cc
• Index of refraction: ~1.51
• Softening Temperature: 730°C