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Quartz Materials
Fused Quartz products are manufactured from Quartz crystals into optically clear or transparent parts and Fused Silica products are manufactured from natural sand into optically opaque parts. The two products are distinguished between the transparent and opaque characteristics of the materials.
As the technology of the Quartz Manufacturing industry evolved, it has resulted in optically clear characteristics for both material types, where naturally occurring sand crystals when melted are now called Fused Quartz and synthetically manufactured Silicon Dioxide (SiO2) are now known as Synthetic Fused Silica.
Typical Properties of Quartz Materials
The properties of Quartz Materials are highly demanding in the Semiconductor and Fibre Optics Industries. Their Properties include:
- High Softening Temperature
- Low Dilatation Temperature
- Good Thermal Heat Exposure Stability
- Good Acid Resistance
- High Mechanical Strength
- Good Electrical Insulation
- Good Optical Properties
Typical Quartz Materials and Application Areas
- Synthetic Quartz Ingot
- Optics
- Lasers
- Photomask Substrates
- Semiconductors
- Natural Quartz Ingot
- Optical Communications
- Solar
- Chemical Laboratories
- High Purity Natural Quartz Ingot
- Semiconductors
- Optical Communications
- Solar
- Quartz Tubing
- Semiconductors
- Solar
- Quartz Rod
- Fibre Optics
- Semiconductors
- Machined Quartz
- Semiconductors
- Optical Communications
- Solar
- Laboratories
- Chemical Processes
Typical Composition Purity (PPM) Grades
Element | PPM |
| Aluminium (Al) | 0.10 – 22.00 |
| Boron (B) | 0.05 – 0.10 |
| Calcium (Ca) | 0.10 – 1.50 |
| Cobalt (Co) | 0.01 – 0.10 |
| Copper (Cu) | 0.05 – 0.10 |
| Iron (Fe) | 0.05 – 1.50 |
| Potassium (K) | 0.05 – 2.00 |
| Lithium (Li) | 0.10 – 2.00 |
| Magnesium (Mg) | 0.01 – 0.30 |
| Manganese (Mn) | 0.01 – 0.50 |
| Sodium (Na) | 0.03 – 2.00 |
| Nickel (Ni) | 0.01 – 0.10 |
| Titanium (Ti) | 0.02 – 2.00 |
Typical Physical Properties
Property Specifications | Values |
| Density | 2.2 g/cm3 |
| Mohs Hardness | 6 – 7 |
| Compressive Resistance | 1100 MPa |
| Tensile Strength | 50 MPa |
| Bulk Elastic Modulus | 37 x 103 MPa |
| Young’s Modulus | 31 x 103 MPa |
| Thermal Conductivity @ 20°C | 1.4 W/(m.°C) |
| Specific Heat @ 20°C | 670 J/(kg.°C) |
| Dielectric Constant | 3.80 |
Typical Dimensional Tolerances
Quartz Rod | Quartz Crucible | ||||||
| Diameter mm | Tolerance mm | Outer Diameter mm | Tolerance mm | Height mm | Tolerance mm | Wall Thickness mm | Tolerance mm |
| < 5 | ± 0.20 | 100 – 130 | ± 0.40 | 90 – 110 | ± 1.00 | 2.5 | ± 0.50 |
| 5 – 15 | ± 0.30 | 130 – 170 | ± 0.50 | 110 – 130 | ± 1.50 | 3.0 | ± 0.50 |
| 15 – 90 | ± 0.30 | 170 – 200 | ± 1.00 | 130 – 150 | ± 1.50 | 3.5 | ± 1.00 |
| – | 200 – 250 | ± 1.50 | 150 – 160 | ± 3.00 | 4.5 | ± 1.00 | |
Quartz Tubing | Round Quartz Plate | Rectangular Quartz Plate | |||||
| Outer Diameter mm | Tolerance mm | Wall Thickness mm | Tolerance % | Dimension mm | Tolerance mm | Dimension mm | Tolerance mm |
| 20 -100 | ± 0.50 | 2- 10 | ± 20 | 10 – 30 | ± 0.20 | 10 – 30 | ± 0.20 |
| 100 – 150 | ± 0.80 | 4 – 10 | ± 20 | 30 – 100 | ± 0.30 | 30 – 100 | ± 0.30 |
| 150-250 | ± 1.00 | 4 – 10 | ± 20 | 100 – 200 | ± 0.50 | 100 – 200 | ± 0.50 |
| 250 – 350 | ± 2.00 | 5 – 7 | ± 20 | 200 – 300 | ± 0.60 | 200 – 350 | ± 0.60 |
| – | 300 – 600 | ± 1.00 | 350 – 600 | ± 2.00 | |||