Quartz Tube Properties
Technical Data and Reference
Properties of Fused Quartz
Silica is found almost everywhere in nature, it represents almost 1/3 the mass of the earthhhs crust. Vitreous Silica is the generic term used to describe all types of silica glass, with manufacturers referring to the material as either Fused Quartz or Fused Silica.
Manufactured by fusing naturally occuring crystalline silica, either sand or rock crystal, a wide range of products are available. After this process, their appearance wil be wither opaque, translucent or transparent. If the silicon dioxide is synthetically derived, the material produced is commonly called Synthetic Fused Silica.
Vitreous Silica, in all its forms, offers a variety of properties such as:
- Extreme Hardness
- Very Low Coefficient of Thermal Expansion
- Resistance to High Temperature
- High Chemical Purity
- High Corrosion Resistance
- Extensive Optical Transmission from Ultra-Violet to Infra-Red
- Excellent Electrical Insulation Qualities
- Remarkable Stability Under Atomic Bombardment
|INTERNAL PRESSURE CALCULATIONS|
|RUPTURE FORMULA FOR TUBING|
|Because fused quartz is used in applications involving internal pressures, it is helpful to know the maximum pressure that can be applied to a selected fused quartz tube. The formula at right can approximate this information at room temperature.|
|S = pr/t|
|Where:||S = Hoop Stress in Pa|
|p = Working Pressure (Pa)|
|r0 = Inside Radius (mm)|
|t = Wall Thickness (mm)|
This formula can not be used when internal pressure exceeds 100 psi.