Machining / Grinding Fused Silica Glass

CiDRA® Precision Services, LLC has years of experience manufacturing micron level tolerance products from Fused Silica. We leverage our in-depth dicing, drilling, milling, grinding, and polishing capability to manufacture the highest quality Fused Silica 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 Fused Silica

Fused Silica is a high purity synthetic amorphous Silicon Dioxide. This noncrystalline glass is colorless, and can be made with very low impurities which make its optical transmission characteristics excellent.  It is resistant to scratching and has a very low thermal expansion and high softening point so it is extremely thermal shock resistant. The material is also chemically inert up to moderate temperatures (except to hydrofluoric acid). UV Grade synthetic fused silica has a very low metallic impurity level making it transparent down to 160nm. This material can be lapped and polished to sub-wavelength tolerances.

Fused Silica Glass Applications

Fused Silica Properties

 

Units

Fused Silica

UV Grade
Fused Silica
Softening Point C 1665 1600
Annealing Point C 1120 1120
Strain Point C 1025 1025
Max Use Temperature C 950 950
Thermal Conductivity W/(m K) 1.3 - 1.4 1.38
Specific Heat J/(kg C) 753 772
Coefficient of Thermal Expansion 1/C (x10^-6) 0.27 - 0.55 5.1
Moh Hardness 5.3 -6.5 5.5 - 6.5
Knoop Hardness kg/mm^2 600 - 615 580 - 620
Density g/cm^3 2.2 2.2
Compressive Strength MPa 1107 1150
Tensile Strength MPa 48 50
Bending Strength MPa 67 67
Young's Modulus GPa 73 73
Poisson's ratio 0.16 - 0.17 0.17
Dielectric Strength kv/cm 150 - 200 250 - 500
Dielectric Constant (@1MHz) 3.7 -3.85 3.7
Dielectric Loss Tangent 0.0001 0.0005
Resistivity ohm/cm 10^18 1x10^16
Usable Transmission Range um 0.18nm to 2.5
3.0 to 3.5		 0.16 to 3.2
Refractive Index (@550nm) 1.46 1.45
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 Fused Silica dicing, drilling, milling, grinding, polishing or any other machining applications.