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Customized Quartz Products from China Suppliers and Factory for High-Temperature Applications
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Mechanical Behavior & Standard Values
| Mechanical Behavior | Standard Values |
|---|---|
| Density | 2.2 g/cm³ |
| Compressive Strength | 1100 MPa |
| Flexural Strength | 67 MPa |
| Poisson's Ratio | 0.14 ~ 0.17 |
| Young's Modulus | 72,000 MPa |
| Modulus of Rigidity | 31,000 MPa |
| Mohs Hardness | 5.5 ~ 6.5 |
| Transformation Point | 1280 °C |
| Softening Point | 1780 °C |
| Annealing Point | 1250 °C |
| Specific Heat (20 ~ 350 °C) | 670 J/kg·°C |
| Thermal Conductivity (20 °C) | 1.4 W/m·°C |
| Index of Refraction | 1.4585 |
| Low Thermal Expansion Coefficient | 5.5 × 10⁻⁷ cm/cm·°C |
| Thermal Processing Temperature | 1750 ~ 2050 °C |
| Short-Term Use Temperature | 1300 °C |
| Long-Term Use Temperature | 1100 °C |
| Material | Silicon Dioxide (Natural Quartz) |
| Color | Transparent or Colorless |
| Surface | No Air Bubble, No Line |
| Strain | 1270°C Fused The Quartz Glass Brick |
| PPM Grade | Controlled 10 / 20 / 100 PPM |
| Shape | Circle |
| Thickness | 2 mm – 20 mm |
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Frequently Asked Questions
Q1
What is the maximum operating temperature for quartz glass?
Quartz glass made from natural silicon dioxide can withstand a short-term use temperature of up to 1300 °C and a long-term use temperature of up to 1100 °C. Its thermal processing temperature ranges from 1750 °C to 2050 °C, making it suitable for high-temperature industrial applications.
Q2
Why is the low thermal expansion coefficient important for quartz glass?
The extremely low thermal expansion coefficient of 5.5 × 10⁻⁷ cm/cm·°C means quartz glass expands very little when heated. This property makes it highly resistant to thermal shock, allowing it to endure rapid temperature changes without cracking — a critical advantage in laboratory and high-temperature environments.
Q3
What thickness options are available for quartz glass?
Quartz glass is available in a thickness range of 2 mm to 20 mm, with a circular shape. This wide range accommodates various industrial, optical, and scientific applications requiring precise dimensional specifications.
Q4
What does the PPM grade indicate and why does it matter?
PPM (Parts Per Million) grade refers to the level of metallic impurities present in the quartz glass. Available grades are controlled at 10, 20, and 100 PPM. Lower PPM grades indicate higher purity, which is essential for semiconductor manufacturing, optical components, and other precision applications where contamination must be minimized.
Q5
What is the compressive strength of this quartz glass and how does it compare to other materials?
The compressive strength of this quartz glass is 1100 MPa, which is exceptionally high compared to standard glass. Combined with a Young's Modulus of 72,000 MPa and a Mohs hardness of 5.5–6.5, it offers excellent mechanical durability for demanding structural and optical applications.
Q6
Is the surface quality of the quartz glass guaranteed to be bubble-free?
Yes. The quartz glass is manufactured to ensure no air bubbles and no surface lines. It is transparent or colorless in appearance and produced from natural silicon dioxide (natural quartz), ensuring optical clarity and consistent surface quality suitable for high-precision applications.