What Is a Conical Zirconia Crucible?
A conical zirconia crucible is a high-temperature ceramic container made from stabilized zirconia and shaped with a tapered or arc-like profile. It is used when a standard cylindrical crucible does not match the furnace chamber, induction coil layout or reactor loading path.
Compared with common alumina crucibles, zirconia crucibles are often selected for higher temperature headroom, dense structure, low porosity and better chemical stability in demanding melting or material-processing conditions. The conical shape helps improve fit-up in compact heating zones and can support more controlled heat distribution when the furnace design requires a non-flat or tapered vessel.
Features of Conical Shaped Zirconia Crucible
- Operational Temperature up to 2200 °C: The crucible maintains structure at continuous service above 2000 °C. This allows extended furnace runs without premature failure.
- Thermal Shock Endurance: Proven resistance to heating/cooling cycles at rates below 5 °C/min. This prevents cracking during rapid transitions in controlled processes.
- Stable Bulk Density ≥ 4.5 g/cm³: High density minimizes heat penetration losses. This ensures uniform distribution across curved furnace walls.
- ZrO₂ Content ≥ 92%: High zirconia composition resists corrosion from molten alloys. This extends service life in metallurgical systems.
- Low Impurity Index (Fe₂O₃ ≤ 0.5%): Reduced impurities protect melts from contamination. This supports clean outcomes in alloy development.
- Apparent Porosity ≤ 0.5%: Dense microstructure limits gas or liquid infiltration. This maintains crucible integrity under reactive atmospheres.
Key Technical Parameters for Conical Zirconia Crucibles
The Arc Shaped Zirconia Crucible combines advanced ceramic engineering with high-purity stabilized zirconia to ensure consistent performance under extreme furnace and reactor conditions.
| Parameter | Typical Value | Why It Matters for Buyers |
|---|---|---|
| ZrO₂ Content | ≥92% | Supports chemical stability and helps reduce contamination risk in high-temperature processing. |
| Bulk Density | ≥4.5 g/cm³ | A dense body improves structural integrity and reduces gas or melt penetration. |
| Apparent Porosity | ≤0.5% | Low porosity helps protect melt cleanliness and reduces infiltration during long holds. |
| Maximum Service Temperature | Up to 2200 °C | Suitable for high-temperature furnace, melting and synthesis applications. |
| Flexural Strength | ≥350 MPa | Helps the crucible resist handling stress and thermal-cycle-related mechanical load. |
| Thermal Expansion Coefficient | 9–11 × 10⁻⁶ /K | Helps engineers evaluate thermal fit and cycling behavior in furnace assemblies. |
| Thermal Conductivity | 2.5–3.0 W/m·K at 1000 °C | Supports controlled heat transfer without excessive lateral heat loss. |
| Electrical Resistivity | ≥10¹² Ω·cm at room temperature | Useful where electrical isolation is required near heating or reactor fixtures. |
These values should be used as material-selection references, not as fixed performance guarantees for every furnace condition. Actual crucible performance depends on charge chemistry, heating rate, support method, atmosphere, thermal gradient and cleaning practice.
Standard Sizes of Conical Zirconia Crucibles
The listed models cover common laboratory and furnace-use capacities. If your furnace uses a special coil profile, limited chamber clearance or a non-standard loading fixture, ADCERAX can review a custom conical zirconia crucible based on drawings, samples or process dimensions.
| Cylindrical ZrO2 Crucible | ||||||
| Item No. | Top Diamete(mm) | Bottom Diameter(mm) | Height(mm) | Wall Thickness(mm) | Volume(ml) | Purity(%) |
| AT-YHG-H001 | 27 | 14 | 22 | 1.5 | 5 | 95 |
| AT-YHG-H002 | 36 | 20 | 42 | 3 | 60 | 95 |
| AT-YHG-H003 | 57 | 30 | 45 | 3 | 60 | 95 |
| AT-YHG-H004 | 59 | 45 | 52 | 2.5 | 80 | 95 |
| AT-YHG-H005 | 62 | 34 | 50 | 3 | 80 | 95 |
| AT-YHG-H006 | 82 | 58 | 80 | 4.2 | 300 | 95 |
| AT-YHG-H007 | 80 | 70 | 115 | 4.8 | 400 | 95 |
| AT-YHG-H008 | 100 | 65 | 110 | 5.5 | 500 | 95 |
| AT-YHG-H009 | 25 | 15 | 28 | 1.3 | 5 | 95 |
| AT-YHG-H010 | 29 | 18 | 34 | 1.5 | 10 | 95 |
| AT-YHG-H011 | 32 | 23 | 33 | 1.5 | 15 | 95 |
| AT-YHG-H012 | 36 | 23 | 41 | 1.7 | 20 | 95 |
| AT-YHG-H013 | 36 | 25 | 42 | 1.7 | 25 | 95 |
| AT-YHG-H014 | 38 | 25 | 45 | 1.7 | 30 | 95 |
| AT-YHG-H015 | 45 | 30 | 46 | 2 | 40 | 95 |
| AT-YHG-H016 | 48 | 30 | 52 | 2 | 50 | 95 |
| AT-YHG-H017 | 58 | 33 | 66 | 2 | 70 | 95 |
| AT-YHG-H018 | 58 | 35 | 68 | 2 | 100 | 95 |
| AT-YHG-H019 | 67 | 42 | 78 | 2.5 | 150 | 95 |
| AT-YHG-H020 | 73 | 44 | 86 | 2.5 | 200 | 95 |
| AT-YHG-H021 | 79 | 46 | 96 | 2.5 | 250 | 95 |
| AT-YHG-H022 | 83 | 50 | 106 | 2.5 | 300 | 95 |
| AT-YHG-H023 | 91 | 56 | 108 | 2.5 | 400 | 95 |
| AT-YHG-H024 | 100 | 60 | 118 | 3 | 500 | 95 |
| AT-YHG-H025 | 59 | 35 | 71 | 2.8 | 100 | 95 |
| AT-YHG-H026 | 49 | 30 | 54 | 2.7 | 50 | 95 |
| AT-YHG-H027 | 38 | 25 | 45 | 2.7 | 30 | 95 |
| AT-YHG-H028 | 75 | 46 | 78 | 3.5 | 250 | 95 |
| AT-YHG-H029 | 100 | 60 | 70 | 4 | 375 | 95 |
Packaging for Conical Zirconia Crucibles
Each conical zirconia crucible is wrapped to reduce surface contact during transport, then packed in reinforced cartons or wooden crates according to order quantity and size. For custom or fragile geometries, packaging can be adjusted to protect the rim, tapered wall and base during international shipping.
