HT 1200 high pure quartz glass tube silica tube with flange
Quartz tube or fused silica tube is glass tube consisting of silica in amorphous (non-crystalline) form. It differs from traditional glasse tube in containing no other ingredients, which are typically added to glass to lower the melt temperature. Quartz tube, therefore, has high working and melting temperatures. The optical and thermal properties of quartz tube are superior to those of other types of glass tube due to its purity. For these reasons, it finds use in situations such as semiconductor fabrication and laboratory equipment. It has betterultraviolet transmission than most other glasses.
Advantage of Quartz tube/pipe:
1)High purity :SiO2> 99.99%.
2)Operating Temperature: 1250℃; SoftenTemperature: 1730℃ .
3)Excellent visual and chemical performance:acid-resistance,alkali resistance,Good thermal stability
4)Health care and environmental protection.
5)No air bubble and no air line.
6)Excellent electrical insulator.
Parameters:
| Property | Typical Values |
| Density | 2.2x103 kg/m3 |
| Hardness | 5.5 - 6.5 Mohs' Scale 570 KHN 100 |
| Design Tensile Strength | 4.8x107 Pa (N/m2) (7000 psi) |
| Design Compressive Strength | Greater than 1.1 x l09 Pa (160,000 psi) |
| Bulk Modulus | 3.7x1010 Pa (5.3x106 psi) |
| Rigidity Modulus | 3.1x1010 Pa (4.5x106 psi) |
| Young's Modulus | 72GPa (10.5x106 psi) |
| Poisson's Ratio | 0.17 |
| Coefficient of Thermal Expansion | 5.5x10 -7 cm/cm·°C (20°C-320°C) |
| Thermal Conductivity | 1.4 W/m·°C |
| Specific Heat | 670 J/kg·°C |
| Softening Point | 1683°C |
| Annealing Point | 1215°C |
| Strain Point | 1120 °C |
| Electrical Resistivity | 7x107 ohm cm (350°C) |
| Dielectric Properties | (20°C and 1 MHz) |
| Constant | 3.75 |
| Strength | 5x107 V/m |
| Loss Factor | Less than 4x10-4 |
| Dissipation Factor | Less than 1x10-4 |
| Index of Refraction | 1.4585 |
| Constringence (Nu) | 67.56 |
| Velocity of Sound-Shear Wave | 3.75x103 m/s |
| Velocity of Sound/Compression Wave | 5.90X103 m/s |
| Sonic Attenuation | Less than 11 db/m MHz |
| Permeability Constants(700°C) | (cm3 mm/cm2 sec cm of Hg) |
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