Heraeus Black Quartz (HBQ®) is a unique black opaque quartz glass composite that benefits from high purity and other properties of our advanced white opaque (OM®) and clear fused (HSQ®) quartz solutions. HBQ® offers smart answers to individual problems, and new answers to old material challenges. Convince yourself and step into a new world of possibilities with Heraeus Black Quartz. To learn more follow the links below.

Heraeus Black Quartz (HBQ®) –
a revolutionary hybrid material

HBQ® can be used in several applications. Please find below some examples.
Further applications:
- Thermal homogenization of process environment
- Blocking of radiation from certain process environments
- Heating element covers, shielding plates, pedestal plates, dummy wafers, wafer holders, etc.
General properties
Unit | HBQ® | |
---|---|---|
Density | g/cm3 | 2.19 |
Porosity | % | <0.5 |
Pore Size | µm | <10 |
Electrical properties
Unit | HBQ® | |
---|---|---|
Resistivity (20°C) | Ω∙m | >1015 |
Resistivity (1200°C) | Ω∙m | >1000 |
Type | Insulator | |
Dielectric constant (εr) @ 13,56 MHz | 3.82 |
Mechanical properties
Unit | HBQ® | |
---|---|---|
Tensile strength | MPa | 50 |
Flexural strength | MPa | 84 |
Compressive strength | MPa | >1000 |
Young modulus | GPa | 54 |
Thermal properties
Unit | HBQ® | |
---|---|---|
Thermal expansion (20-200°C) | K-1 | 0,57 x 10-6 |
Thermal conductivity (20°C) | W∙m-1∙K-1 | 1.49 |
Max. working temperature | °C |
1160 °C (long) 1300 °C (short) |
Emissivity @ 1000°C | % | 80-90 |