Machining / Grinding Borosilicate Glass

CiDRA® Precision Services, LLC has years of experience manufacturing micron level tolerance products from Borosilicate glass. We leverage our in-depth dicing, drilling, milling, grinding, and polishing capability to manufacture the highest quality Borosilicate products. For those applications with exacting optical requirements, CiDRA® Precision Services, LLC has the ability to clean, polish, and apply coatings.

Whether you need prototypes or volumne production, CiDRA® Precision Services, LLC is here to help. Please contact us to discuss your applications.

About Borosilicate Glass

Borosilicate glass is primarily made from Silica and Boron Oxide. It has a relatively low coefficient of thermal expansion (though not as low as Fused Silica). Because of its excellent durability, chemical and heat resistance, Borosilicate glass is commonly used for chemical laboratory equipment, lighting and some optical windows. Pyrex, manufactured by Corning, Inc., is a common brand of Borosilicate glass. Duran™ or Borofloat™ by Schott Glass are other common brand names.

Borosilicate Glass Applications

Borosilicate Glass Properties

 

Units

Borosilcate Glass 

Schott D263

Schott AF 45™ Thin Glass

Corning 0211 Microsheet
Softening Point C 820 736 883 720
Annealing Point C 565 557 630 550
Strain Point C 515 529 627 508
Max Use Temperature C 230
Thermal Conductivity W/(m K) 1.13 0.93 0.96
Specific Heat J/(kg C) 753 - 837
Coefficient of Thermal Expansion 1/C (x10^-6) 3.30 7.2 4.5 7.4
Moh Hardness
Knoop Hardness
(100g load)		 kg/mm^2 420 -520 590 555 458
Density g/cm^3 2.23 2.51 2.72 2.53
Compressive Strength MPa 2000
Tensile Strength MPa 282
Bending Strength MPa 69
Young's Modulus GPa 64 73 66 74
Poisson's ratio 0.2 0.21 0.24 0.22
Dielectric Strength kv/cm 50
Dielectric Constant (@1MHz) 4.6 - 5.1 6.7 6.2
Dielectric Loss Tangent 0.026 0.0046 0.0009
Resistivity ohm/cm 8x10^10 8.3x10^10 10^13
Usable Transmission Range um 0.3 to 2.0 0.42 to 2.2
Refractive Index (@550nm) 1.47 - 1.5 1.523 1.53 1.523
The information provided in this table is for room temperature only, and is a compilation of publicly available data.  This information is provided for comparison purposes only, and is not intended to be warrantable.   Further, CiDRA® Precision Services, LLC disclaims any and all liability from errors, inaccuracies, or omissions.

 

Please contact us if you would like to discuss your Borosilicate glass dicing, drilling, milling, grinding, polishing or any other machining applications.