Tungsten Crucibles: Key Considerations for Buyers in 2025
Tungsten crucibles are essential components in high-temperature applications, offering unmatched durability and heat resistance. This article provides practical insights for buyers looking to source quality tungsten crucibles from China in 2025.
How to Find Reliable Tungsten Crucibles from China in 2025
China remains the leading manufacturer of tungsten products, but quality varies significantly. Follow these steps to identify trustworthy suppliers:
- Verify certifications like ISO 9001 and RoHS compliance
- Request material test reports for purity verification
- Check production capacity and lead times
- Review customer testimonials and case studies
Top industrial zones for tungsten products include Hunan, Jiangxi, and Guangdong provinces.
What Buyers Should Know Before Buying Tungsten Crucibles from China
Critical factors to consider:
- Minimum order quantities (typically 5-50 units)
- Shipping costs and import duties
- Payment terms (30% deposit is standard)
- Quality control processes
Always request samples before large orders. Reputable suppliers often provide 1-2 free samples for evaluation.
Types of Tungsten Crucibles
Common variants include:
| Type | Purity | Max Temperature |
|---|---|---|
| Pressed | 99.95% | 2400°C |
| Sintered | 99.99% | 2800°C |
| Machined | 99.95% | 2200°C |
Functions and features of Tungsten Crucibles
Key characteristics:
- Extreme temperature resistance
- Low thermal expansion
- Excellent corrosion resistance
- High density (19.3 g/cm³)
These properties make them ideal for crystal growth, metal evaporation, and semiconductor applications.
Scenarios of Tungsten Crucibles
Primary applications:
- Single crystal growth furnaces
- Vacuum coating systems
- High-temperature sintering
- Rare earth metal melting
A semiconductor manufacturer reported 40% longer lifespan compared to molybdenum crucibles.
How to Choose Tungsten Crucibles
Selection criteria:
- Determine required purity level
- Calculate thermal cycling needs
- Evaluate chemical compatibility
- Consider dimensional tolerances
For continuous use above 2000°C, sintered crucibles offer best performance.
Tungsten Crucibles Q & A
Q: What's the typical lead time for orders from China?
A: Standard production takes 4-6 weeks, plus 2-3 weeks shipping.
Q: How do I prevent crucible cracking during thermal cycling?
A: Gradually increase temperature (max 10°C/min) and avoid rapid cooling.
Q: What's the price range for 100mm diameter crucibles?
A: $200-$600 depending on purity and wall thickness.
Q: Can tungsten crucibles be reused?
A: Yes, with proper cleaning. Average lifespan is 20-50 cycles.
Q: What alternatives exist for oxygen-sensitive applications?
A: Lanthanum-coated tungsten crucibles provide better oxidation resistance.
