Quartz Crucible
- Electrical Resistivity(350°C,omh-cm): 7*107
- Insulating Strength(20°C,KV/cm): 250~400
- Dielectric Constant: 3.7
Quartz crucibles are indispensable tools in industries requiring high-purity materials and extreme temperature resistance. These crucibles are widely used for melting, refining, and handling materials like mono-crystalline silicon in solar and semiconductor applications. With their exceptional properties, quartz crucibles have become a cornerstone of modern industrial processes, ensuring precision, durability, and reliability.
Technical Characteristics of Quartz Crucibles
Quartz crucibles exhibit a range of technical characteristics that make them ideal for demanding applications:
- Purity: Quartz crucibles boast an SiO₂ content exceeding 99.99%, ensuring minimal contamination during use.
- Temperature Resistance: They can withstand prolonged exposure at 1100°C and short-term use up to 1450°C, with a softening point at approximately 1730°C.
- Corrosion Resistance: Quartz glass is highly resistant to most acids, except hydrofluoric acid and phosphoric acid at elevated temperatures. It also exhibits minimal corrosion from alkalis and salts at room temperature.
- Transmittance Performance: Compared to ordinary silicate glass, quartz crucibles offer superior light transmittance across the entire wavelength spectrum. In the visible region, transmittance exceeds 85-90%, while in the UV region, it remains significantly higher than other materials, reaching around 80%.
- Electrical Insulation: Quartz crucibles maintain excellent dielectric strength and low electrical conductivity, even under high-temperature, high-pressure, and high-frequency conditions.
- Thermal Stability: With an extremely low thermal expansion coefficient, quartz crucibles can handle drastic temperature changes without cracking or deforming.
Advantages of Quartz Crucibles
The advantages of quartz crucibles make them a preferred choice across various industries:
- High Purity: With SiO₂ content above 99.99%, these crucibles ensure minimal impurities during critical processes like mono-crystalline silicon production.
- Excellent Heat Resistance: Their ability to withstand extreme temperatures makes them suitable for high-temperature melting and refining applications.
- Versatility: Quartz crucibles are used in industries ranging from chemical manufacturing and metallurgy to laboratories and photovoltaic research.
- Energy Efficiency: Superior thermal insulation properties contribute to energy savings during operations.
- Durable Design: Precision manufacturing ensures high dimensional accuracy and stability, reducing the risk of failure during use.
Applications of Quartz Crucibles
Quartz crucibles find extensive use in a variety of fields due to their unique properties:
- Chemical Industries: For handling corrosive materials and conducting high-temperature reactions.
- Electric Light Source Manufacturing: Used in the production of specialized lighting components.
- Laboratories: Ideal for experiments involving high temperatures and purity requirements.
- Medical Equipment: Ensuring sterility and precision in sensitive applications.
- Metallurgy: Supporting processes like metal refining and casting.
- Optics and Photovoltaics: Essential for producing high-quality optical components and solar-grade silicon.
- Research and Education: Widely used in academic institutions for advanced studies.
Precision and Quality Standards
Our quartz crucibles adhere to strict quality standards, ensuring consistent performance across various dimensions and applications:
| Range of OD | OD | WT | Siding | Out of Round | Bow/1000mm |
|---|---|---|---|---|---|
| 10mm Max | ±2.00% | ±10% | 12% | 2.0% | 2.0mm |
| 10 – 20mm | ±1.25% | ±8% | 10% | 1.5% | 2.0mm |
| 20 – 30mm | ±1.00% | ±10% | 15% | 1.5% | 2.0mm |
| 30 – 50mm | ±1.00% | ±10% | 15% | 1.5% | 2.0mm |
| 50 – 100mm | ±1.00% | ±12% | 15% | 2.0% | 2.0mm |
| 100 – 200mm | >2.0mm | 2.0mm | 2.0mm | 2.0mm | 2.0mm |
Corrosion Resistance Data
Quartz crucibles demonstrate remarkable resistance to various chemicals, as shown below:
| Chemical | Conditions | Corrosion Amount (g/cm²) |
|---|---|---|
| H₂SO₄ | Density 1.84, 2h, 20°C | 1.4 × 10⁻⁸ |
| HNO₃ | Density 1.4, 2h, 20°C | 5 × 10⁻⁸ |
| HCl | Density 1.19, 2h, 20°C | 15 × 10⁻⁸ |
| NaOH | 1%, 2h, 110°C | 166 × 10⁻⁶ |
| KOH | 1%, 2h, 98°C | 68 × 10⁻⁶ |
Thermal and Mechanical Properties
Quartz crucibles exhibit excellent thermal and mechanical properties, making them durable and reliable under extreme conditions:
| Property | Value |
|---|---|
| Density (g/cm³) | 2.2 |
| Compression Strength (N/mm²) | 1100 |
| Bending Strength (N/mm²) | 67 |
| Tension Strength (N/mm²) | 48 |
| Micro Hardness (N/mm²) | 8600–9800 |
| Moh’s Hardness | 5.5–6.5 |
Quartz crucibles are unparalleled in their ability to deliver high purity, thermal stability, and corrosion resistance, making them essential for industries ranging from solar energy to advanced research. Our commitment to precision manufacturing and rigorous quality control ensures that our quartz crucibles meet the highest standards, providing reliable performance in even the most challenging environments. Whether for laboratory experiments, industrial applications, or cutting-edge research, quartz crucibles remain a trusted solution for achieving optimal results.
| 1. Purity | SiO2 content is more than 99.99% |
| 2. Temperature | Softening point temperature is about 1730 degrees Celsius ,
1100 degrees Celsius in a long time used ,short-time maximum use temperature is up to 1450 degrees Celsius |
| 3. Anti-corrosion | Quartz glass is acidic materials, except hydrofluoric acid
and 300 degrees Celsius thermal phosphoric acid, on any other acids were shown to be inert, is the best anti acid materials. At room temperature, alkali and salt on quartz glass corrosion degree is minimal |
| 4. Transmittance good performance | Compare to ordinary silicate glass, transparent quartz glass
in the whole wavelength head excellent permeability. In the infrared spectrum through than ordinary glass; in the visible region, quartz glass transmittance is relatively high ,above 85-90%. In the UV spectral region especially in the ultraviolet region, the spectral transmission is much better than other glass,about 80% |
| 5. Good electrical insulation properties | Quartz glass with high dielectric strength and very low electrical
conductivity, even in high temperature, high pressure and high frequency,it can still maintain high dielectric strength and resistance, in the application of the band almost no dielectric loss, therefore the quartz glass is an excellent high temperature dielectric insulating material |
| 6.Thermal stability | The thermal expansion coefficient of quartz galss is extremely
small ,it can be able to adapt drastic temperature changes |
