Opaque quartz is a specially engineered quartz material characterized by controlled internal light-scattering properties and a dense microstructure. Unlike transparent or semi-transparent quartz grades, it is specifically designed to limit light transmission while maintaining the inherent thermal resistance, chemical stability, and high-temperature durability of high-purity silica. This unique combination of optical control, structural stability, and processing reliability makes it a critical material in advanced industrial and high-temperature process environments, particularly in semiconductor and photovoltaic thermal processing applications.
Our Capabilities
At Alfa Chemistry, we specialize in the development and supply of high-performance opaque quartz engineered with precise control over internal micro-scale porosity. This controlled structure allows us to tailor key optical properties such as low transmittance and high reflectivity, ensuring optimal performance in thermally intensive and optically sensitive applications.
Beyond material design, we also focus on advanced processing capabilities. Our opaque quartz products demonstrate excellent machinability and can be reliably processed through welding, fire polishing, thermal reshaping, and high-precision optical polishing. This versatility allows the material to be integrated into complex industrial components without compromising structural integrity or performance consistency.
These advantages make our products highly suitable for semiconductor and photovoltaic thermal processing applications, where controlled heat distribution, radiation management, and long-term operational stability are critical. Under demanding high-temperature operating conditions, the material helps improve process uniformity, reduce thermal energy loss, and enhance overall manufacturing efficiency.
Specification Parameters
FQ-03 Opaque Quartz (Cat: ACSEM-FQ-0003)
Major Impurity Elements
| Content (ppm, wt%) | Al | Li | Na | K | Mg | Ca | Fe | Cu | Cr | Ni | Mn | Ti |
| FQ-03 | <13 | <0.7 | <1.0 | <0.5 | <0.3 | <1.0 | <0.5 | <0.62 | <0.06 | <0.01 | <0.02 | <0.93 |
Product Specifications
| Shape | Length/Diameter (mm) | Width (mm) | Height (mm) | Pore Size (μm) |
| Cylindrical Ingot | 500 | / | 50 | <60 |
| Square Ingot | 350 | 350 | 50 | <60 |
Application Environment
| Maximum Operating Temperature | Temperature (°C) |
| Long-Term Continuous Operating Temperature | 1100 |
| Short-Term Maximum Operating Temperature | 1300 |
Mechanical Properties
| Parameter | Unit | Test Result |
| Density | g/cm3 | 2.16-2.19 |
| Mohs Hardness | - | 6-7 |
| Young's Modulus | GPa | 54 |
| Shear Modulus | GPa | - |
| Poisson's Ratio | - | - |
| Compressive Strength | GPa | >1 |
| Tensile Strength | MPa | 49 |
Electrical Properties
| Parameter | Unit | Test Result |
| Dielectric Constant (20 °C, 500 MHz) | - | 3.9 |
Thermal Properties
| Parameter | Unit | Test Result |
| Coefficient of Thermal Expansion (20~900 °C) | ×10-6/°C | 0.47 |
| Thermal Conductivity (20~900 °C) | W/(m·K) | 1.24 |
Choose Alfa Chemistry
Choosing Alfa Chemistry means selecting a partner with deep expertise in advanced quartz material engineering and a strong commitment to quality assurance. Our expert team is committed to integrating material science knowledge with strict production control systems to ensure that every batch of opaque quartz products meets demanding industrial application specifications.
Our solutions are designed not only to meet standard requirements but also to support customized development needs across semiconductor, photovoltaic, and high-temperature industrial applications. With a focus on reliability, technical support, and continuous innovation, we are dedicated to helping customers achieve superior process performance and long-term operational stability. If you have any requirements or specific project needs, please feel free to contact Alfa Chemistry at any time, and we will be dedicated to providing you with professional services and technical support.
