Low-hydroxyl synthetic quartz ingots are premium high-purity optical materials developed for demanding applications requiring exceptional optical transmission, thermal stability, and material reliability. Thanks to their extremely low hydroxyl (OH) content, these quartz ingots exhibit remarkably low absorption characteristics, especially in infrared wavelength regions, making them highly suitable for advanced optical systems, semiconductor manufacturing, laser technologies, aerospace optics, and photolithography applications.
Our Capabilities
Alfa Chemistry is committed to providing high-quality low-hydroxyl synthetic quartz ingots for advanced optical, semiconductor, and laser applications. Leveraging extensive expertise in quartz material engineering and precision manufacturing, we are capable of delivering products with exceptionally low absorption coefficients, high laser damage thresholds, low stress birefringence, high optical homogeneity, and extremely low impurity element content. These outstanding characteristics enable excellent optical transmission efficiency, reduced optical distortion, superior structural uniformity, and reliable performance under demanding operating conditions. In addition, we offer flexible customization services for dimensions and specifications while maintaining strict quality control standards to ensure consistent product quality and long-term stability for global customers.
Specification Parameters
QI-05 Low-Hydroxyl Synthetic Quartz Ingots (Cat: ACSEM-QI-0005)
QI-06 Low-Hydroxyl Synthetic Quartz Ingots (Cat: ACSEM-QI-0006)
QI-07 Low-Hydroxyl Synthetic Quartz Ingots (Cat: ACSEM-QI-0007)
QI-08 Low-Hydroxyl Synthetic Quartz Ingots (Cat: ACSEM-QI-0008)
Major Impurity Elements and Hydroxyl
| Content (ppm, wt%) | Li | Na | K | Mg | Ca | Cu | Al | Cr | Fe | Ti | Hydroxyl |
| QI-05 | <0.005 | <0.015 | <0.01 | <0.001 | <0.01 | <0.001 | <0.001 | <0.001 | <0.001 | <0.005 | <250 |
Product Features
| Model | Optical Uniformity (ppm) | Stress Birefringence (nm/cm) | Bubble | Fluorescence |
| QI-05 | NS | ≤5 | Class 0, Class 1, Class 2 | None |
Major Impurity Elements and Hydroxyl
| Content (ppm, wt%) | Li | Na | K | Mg | Ca | Cu | Al | Cr | Fe | Ti | Hydroxyl |
| QI-06 | ≤0.01 | ≤0.01 | ≤0.01 | ≤0.01 | ≤0.01 | ≤0.01 | ≤0.01 | ≤0.01 | ≤0.01 | ≤0.01 | <250 |
Product Features
| Model | Typical Dimensions (mm) | Optical Uniformity (ppm) | Stress Birefringence (nm/cm) | Striae Grade |
| QI-06 | 500(±10)*240(±10)*70(±10) | NS | NS | NS |
Mechanical Performance
| Parameter | Unit | Test Result |
| Density | g/cm3 | 2.20 |
| Mohs Hardness | - | 7 |
| Young's Modulus | GPa | 74.20 |
| Shear Modulus | GPa | 31.22 |
| Poisson's Ratio | - | 0.17 |
| Compressive Strength | GPa | 1.13 |
| Tensile Strength | MPa | 49 |
| Bending Strength | MPa | 94.3 |
Electrical Performance
| Parameter | Unit | Test Result |
| Dielectric Constant (20 °C, 500 MHz) | - | 3.90 |
| Electrical resistivity (20 °C) | Ω·cm | 0.1*1018 |
| Dielectric Loss Angle (tan δ, 500 MHz) | - | <0.001 |
| Resistance | Ω | 8.0*1015 |
Thermal Properties
| Parameter | Unit | Test Result |
| Strain Point (η=1014.5dPa·s) | °C | 1000 |
| Annealing Point (η=1013dPa·s) | °C | 1160 |
| Softening Point (η=107.6dPa·s) | °C | 1620 |
Major Impurity Elements and Hydroxyl
| Content (ppm, wt%) | Li | Na | K | Mg | Ca | Cu | Al | Cr | Fe | Ti | Hydroxyl |
| QI-07 | <0.005 | <0.015 | <0.01 | <0.001 | <0.005 | <0.001 | <0.003 | <0.001 | <0.001 | <0.005 | <50 |
Product Features
| Model | Fluorescence | Stress Birefringence (nm/cm) | Bubble | Striae Grade |
| QI-07 | None | ≤5 | Class 00, Class 0 | 5 |
Δn Uniformity Grade (ppm)
| Model | HH | H1 | H2 | H3 | H4 | H5 | H10 | H20 |
| QI-07 | ≤0.5 | ≤5 | ≤2 | ≤3 | ≤4 | ≤5 | ≤10 | ≤20 |
Refractive Index Performance
| Spectral Line Wavelength (nm) | Refractive Index | Spectral Line Wavelength (nm) | Refractive Index |
| 365.11 | 1.47464 | 643.85 | 1.45682 |
| 404.66 | 1.46972 | 656.27 | 1.45648 |
| 435.84 | 1.46680 | 706.52 | 1.45526 |
| 441.60 | 1.46633 | 768.20 | 1.45400 |
| 479.99 | 1.46361 | 852.11 | 1.45257 |
| 486.13 | 1.46324 | 1013.98 | 1.45034 |
| 546.07 | 1.46019 | 1129.00 | 1.44895 |
| 587.56 | 1.45858 | 1529.6 | 1.44433 |
| 589.30 | 1.45851 | 1970.1 | 1.43857 |
| 632.80 | 1.45713 | 2325.4 | 1.43300 |
Test conditions: Atmospheric pressure 1013.25 hPa, 50% RH, temperature 22 ± 0.5 °C
Sellmeier Dispersion Constant
| Model | A1 | A2 | A3 | B1 | B2 | B3 |
| QI-07 | 1.18002067E+00 | 5.99942095E-01 | 5.04615067E-01 | 1.26528056E+02 | 3.82648676E-03 | 1.27738942E-02 |
Major Impurity Elements and Hydroxyl
| Content (ppm, wt%) | Li | Na | K | Mg | Ca | Cu | Al | Cr | Fe | Ti | Hydroxyl |
| QI-08 | <0.005 | <0.015 | <0.01 | <0.001 | <0.01 | <0.001 | <0.001 | <0.001 | <0.001 | <0.005 | <250 |
Product Features
| Model | Fluorescence | Stress Birefringence (nm/cm) | Bubble | Striae Grade |
| QI-08 | None | ≤5 | Class 00, Class 0, Class 1, Class 2 | 5 |
Heat Absorption Coefficient
| Model | Heat Absorption Coefficient @ 1064nm (ppm/cm) |
| QI-08 | <3 |
Refractive Index Performance
| Spectral Line Wavelength (nm) | Refractive Index | Spectral Line Wavelength (nm) | Refractive Index |
| 365.11 | 1.47463 | 643.85 | 1.45680 |
| 404.66 | 1.46971 | 656.27 | 1.45647 |
| 435.84 | 1.46678 | 706.52 | 1.45524 |
| 441.60 | 1.46631 | 768.20 | 1.45398 |
| 479.99 | 1.46360 | 852.11 | 1.45255 |
| 486.13 | 1.46322 | 1013.98 | 1.45030 |
| 546.07 | 1.46018 | 1129.00 | 1.44890 |
| 587.56 | 1.45856 | 1529.6 | 1.44423 |
| 589.30 | 1.45850 | 1970.1 | 1.43848 |
| 632.80 | 1.45712 | 2325.4 | 1.43300 |
Test conditions: Atmospheric pressure 1013.25 hPa, 50% RH, temperature 22 ± 0.5 °C
Sellmeier Dispersion Constant
| Model | A1 | A2 | A3 | B1 | B2 | B3 |
| QI-08 | 3.24003322E+00 | 4.23679877E-01 | 6.81045469E-01 | 3.36972129E+02 | 1.76338697E-03 | 1.16721850E-02 |
Choose Alfa Chemistry
Alfa Chemistry combines advanced manufacturing expertise, strict quality control, and flexible customization capabilities to provide reliable low-hydroxyl synthetic quartz solutions for customers worldwide. We offer products with consistent quality, excellent optical properties, and dependable performance to meet diverse application requirements in semiconductor, laser, and precision optical industries. If you are interested in our products, please feel free to contact us.
