Quartz Ingot
- Primary Material: 99.99% high-purity fused quartz (SiO₂)
- Form: Solid cylindrical/slab ingot (unprocessed)
- Impurity Levels: <10ppm total metallic contaminants (Fe, Al, Ca, etc.)
- OH Content: <5ppm (low-hydroxyl grade available)
Description
Material Composition
Primary Material:
99.99% high-purity fused quartz (SiO₂)
01
Form:
Solid cylindrical/slab ingot (unprocessed)
02
Impurity Levels:
<10ppm total metallic contaminants (Fe, Al, Ca, etc.)
03
OH Content:
<5ppm (low-hydroxyl grade available)
04
Properties
|
Physical Properties |
Values |
|
Purity |
＞99.99% |
|
Density |
2.2g/cm3 |
|
Transparency |
＞90% |
|
Mohs Hardness |
5.5--6.5 |
|
Deformation Point |
1280℃ |
|
Softening Point |
1780℃ |
|
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 |
5.510 -7cm/cm.℃ |
|
Hot - working Temperature |
1750--2050℃ |
|
Short - term Service Temperature |
1300℃ |
|
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 |
7107Ω.cm |
|
Insulation Strength |
250~400Kv/cm |
|
Dielectric Constant |
3.7~3.9 |
|
Dielectric Absorption Coefficient |
＜410-4 |
|
Dielectric Loss Coefficient |
＜110-4 |
|
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 |
Applications
Semiconductor:
- CVD chamber components
- Wafer processing carriers
01
Optics Manufacturing:
- Blank for lenses, prisms, windows
- UV lithography components
02
Industrial:
- High-temperature sight glasses
- Plasma etching components
03
Research:
- Laser optics substrates
- Vacuum system fabrication
04
Advantages
- Lower Defects: Fewer bubbles/inclusions vs. melted quartz
- Batch Consistency: Tight dimensional tolerances (±0.5mm)
Transparent quartz ingot and Milky white quartz ingot are available
FAQ
Q1: How does quartz ingot compare to synthetic fused silica?
A: Higher temperature resistance but similar optical properties. Synthetic silica has better UV transmission below 200nm.
Q2: Can quartz ingot be directly used without machining?
A: No – requires cutting/polishing for functional applications.
Q3: What's the maximum usable temperature?
A: 1100°C continuous (short-term to 1450°C). Above 1200°C, gradual devitrification occurs.
Q4: Are there metallic impurities?
A: Our standard grade has <10ppm metals.
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