High-Purity Zirconia Crucible
Ultimate High-Temperature Resistance · Superior Chemical Inertness · First Choice for Precious Metal Melting & Ultra-High-Temperature Experiments
Manufactured using high-purity yttria-stabilized zirconia precision ceramic process, with purity up to 99.5%–99.9%. Ideal for the most demanding high-temperature environments.
Key Performance
- Maximum operating temperature: 1900–2000°C in air for long-term use; up to 2100–2200°C in vacuum/inert atmosphere
- Excellent chemical stability: Virtually no wetting or contamination of precious metals (Pt, Pd, Rh, Ir, Au, etc.), superalloys, or acidic slags
- Outstanding thermal shock resistance: Withstands rapid temperature changes without cracking (recommended ramp rate ≤5°C/min)
- Extremely low thermal expansion + high density: Excellent dimensional stability, service life typically 2–5× longer than alumina crucibles
Typical Application Scenarios
- Refining and casting of precious metals and platinum-group metals (Pt, Pd, Rh, Ir, etc.)
- Laboratory melting and small-batch prototyping of high-temperature alloys and superalloys
- High-temperature calcination and sintering of rare-earth compounds and specialty ceramic powders
- High-temperature melting experiments for optical glass and luminescent materials
Product Performance Specifications
| Property | Typical Value / Range | Remarks |
|---|---|---|
| Material Purity (ZrO₂) | ≥99.5% ~ 99.9% | Primarily yttria-stabilized |
| Density | 5.6–6.0 g/cm³ | Fully dense sintered |
| Max. Operating Temperature | 1900–2000°C (air) 2100–2200°C (inert/vacuum) | Depending on size & atmosphere |
| Melting Point | ≈2700°C | Intrinsic material property |
| Thermal Expansion Coefficient | ≈10 × 10⁻⁶ / K | Very low, excellent stability |
| Flexural Strength | 800–1000 MPa | High toughness |
| Thermal Conductivity | Low (≈2–3 W/m·K) | Good thermal insulation |
| Thermal Shock Resistance (ΔT) | Good (>200–300°C quench) | Superior to alumina |
FAQ
Q1: What is the biggest advantage of zirconia crucibles compared to alumina crucibles?
A: Much higher maximum temperature (up to >2200°C), stronger chemical inertness (especially no contamination of precious metals), and typically 2–5× longer service life.
Q2: What should I pay most attention to during use?
A: Avoid extreme thermal shock — recommended heating/cooling rate ≤5°C/min; never subject to mechanical impact; use slower rates for large sizes or fast processes.
Q3: Can you provide custom sizes and shapes?
A: Yes — we support cylindrical, tall-form, lidded, boat, square, and many other shapes, with capacities from 5 ml to 500 ml+, and welcome drawings or specific requirements for custom production.
