Quartz Diffusion Tube
✔ Precise gas/liquid diffusion control
✔ High-temperature vapor delivery
✔ Corrosion-resistant fluid handling
✔ Vacuum system integration (to 10⁻⁶ Torr)
Description
Features
1. Ultra-High Purity Material: Manufactured from 99.999% synthetic fused quartz (SiO₂)
2. Precision Geometry: Uniform inner diameter (±0.05mm tolerance) for consistent flow characteristics
3. Thermal Stability: Withstands continuous operation from -196°C to 1100°C
4. Chemical Resistance: Inert to all acids (except HF), bases, and organic solvents
5. Optical Clarity: >90% transmission from 190nm (UV) to 2500nm (IR)
6. Surface Finish: Fire-polished interior to minimize particle adherence
Applications
- Chemical vapor deposition (CVD) systems
- Semiconductor processing equipment
- High-purity gas delivery systems
- Analytical instrument sample introduction
- Photochemical reaction chambers
- High-temperature catalysis studies
Properties
|
Physical Properties |
Values |
|
Purity |
＞99.99% |
|
Density |
2.2g/cm3 |
|
Transparency |
＞90% |
|
Mohs Hardness |
5.5--6.5 |
|
Deformation Point |
1280℃ |
|
Softening Point |
1750℃ |
|
Annealing Point |
1250℃ |
|
Specific Heat (20 - 350°C) |
670J/kg.℃ |
|
Thermal Conductivity (20°C) |
1.4W/m.℃ |
|
Heat Conductivity (w/m.k,1000 ℃ ) |
1.0-1.2 |
|
Refractive Index |
1.4585 |
|
Coefficient of Thermal Expansion |
5.5*10 -7cm/cm.℃ |
|
Hot - working Temperature |
1750--2050℃ |
|
Short - term Service Temperature |
1450℃ |
|
Long - term Service Temperature |
1100℃ |
|
Chemical Properties |
Values |
|
Acid resistant |
Strong Acid(except HF),Strong alkali, organic solution |
|
High temperatures Corrosion resistant |
Excellent |
|
Metal Impurity Content |
＜5 ppm |
|
Electrical Properties |
Values |
|
Resistivity |
7*107Ω.cm |
|
Insulation Strength |
250~400Kv/cm |
|
Dielectric Constant |
3.7~3.9 |
|
Dielectric Absorption Coefficient |
＜4*10-4 |
|
Dielectric Loss Coefficient |
＜1*10-4 |
|
Mechanical Properties |
Values |
|
Compressive Strength |
1100MPa |
|
Bending Strength |
67MPa |
|
Tensile Strength |
48MPa |
|
Poisson's Ratio |
0.14~0.17 |
|
Young's Modulus |
72000MPa |
|
Shear Modulus |
31000MPa |
Advantages
- Superior performance to stainless steel or alumina alternatives
- Excellent thermal shock resistance (ΔT >1000°C/min)
- Minimal out-gassing for UHV applications
- Customization geometries and connections
Quality Assurance
- Each tube includes dimensional certification
- Material purity verification (ICP-MS)
- Cleanroom packaging for critical applications
Shipping
FAQ
Q1: Can these quartz diffusion tubes be used with hydrofluoric acid?
A: No - quartz reacts violently with HF. Use fluoropolymer alternatives instead
Q2: What maximum pressure can they withstand?
A: Standard tubes rated to 3 bar
Q3: How do quartz diffusion tube compare to ceramic for high-temp applications?
A: Quartz offers:
- Better thermal shock resistance
- Superior chemical purity
- Optical transparency
- Smoother surface finish
Q4: What end connections are available?
A: Options include:
- Flanged connections
- Ground glass joints
- Compression fittings
- Custom metal-to-quartz seals
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