Alumina Crucibles (Al2O3) — Laboratory, Thermal Analysis & Furnace Crucibles
ADCERAX is a China-based advanced ceramics manufacturer producing custom alumina (Al₂O₃) crucibles with tight, drawing-confirmed tolerances and custom geometries for laboratory, thermal analysis and high-temperature applications.
Standard and Custom Alumina Crucibles
ADCERAX manufactures alumina crucibles in cylindrical, rectangular and custom forms, with optional lids and drawing-based machining. Send your shape, size or capacity, working temperature and quantity for a quote.
1730°C
Max Operating Temp
（99.7% Purity）
with Lids available
Tolerance and small
batch custom
What is Alumina Crucible?
An alumina crucible is a high-purity aluminium-oxide (Al₂O₃) ceramic container used to heat, calcine, sinter or melt samples in laboratories, thermal analysis and high-temperature furnaces.
ADCERAX manufactures custom alumina crucibles by shape, size, grade and drawing — send your requirements for an engineering review and quote.
Superior wear resistance for demanding applications
Operates reliably up to 1730°C
Outstanding dielectric properties
Inert to acids, alkalis, and corrosive media
Alumina Crucible Properties & Benefits
⭐Alumina Crucible Properties
Alumina crucibles are made from technical alumina classified under IEC 60672-3 (C-786 ≈96%, C-795 ≈99%, C-799 ≈99.7% Al₂O₃). The values below are typical material reference values by grade, not part-specific guarantees.
| Property | 96% Al₂O₃ | 99% Al₂O₃ | 99.7% Al₂O₃ |
|---|---|---|---|
| Density (g/cm³) | 3.6–3.75 | 3.80–3.90 | ≥3.93 |
| Flexural Strength (MPa) | 260 | 300 | 330 |
| Hardness (Mohs) | 8.8 | 9.0 | 9.1 |
| Thermal Conductivity (W/m·K) | 22 | 24 | 29 |
| Melting Point (°C) | ≈2050 | ≈2050 | ≈2050 |
| Max Operating Temp (°C) | 1450 | 1680 | 1730 |
| Safety Temperature Range | RT–1500 | RT–1600 | RT–1700 |
Material grades per IEC 60672-3: 96% (C-786), 99% (C-795), 99.7% (C-799)
⭐Alumina Crucible Benefits
An alumina ceramic crucible machined to ±0.1 mm-5mm (tolerance) keeps wall thickness and curvature consistent, delivering predictable heat profiles and repeatable mass balances.
An al2o3 crucible with lid builds a calm boundary layer that reduces drafts, vapor loss, and powder lift—ideal for TGA/DSC and inert-gas workflows.
High-form vs. low-form adjusts surface exposure; cylindrical aids even flow and handling, while rectangular packs tighter in a fixed furnace to raise per-cycle yield.
Consistent Al2O3 crucibles (3–4000 ml) support bench-to-pilot scaling without re-qualifying interfaces; spouts, pointed bottoms, racks, and paired IDs improve transfer and traceable repeats.
When to Choose Alumina Crucibles for Your Application?
Alumina crucibles are the industry standard for high-temperature laboratory and industrial applications. Their unique combination of chemical inertness, thermal stability, and cost-effectiveness makes them the preferred choice for most calcination, sintering, and thermal analysis workflows.
Alumina Crucibles Are the Best Choice
| Your Application | Recommended Grade | Why This Grade |
|---|---|---|
| TGA / DSC for pharmaceutical, analytical, or thermal analysis | 99.7% | Lowest impurity pickup, stable baseline, chemically inert up to high temperature, reusable for 10+ cycles |
| Laboratory calcination (general) | 99% | Good balance of purity, chemical stability, and cost for routine lab work |
| Laboratory calcination & ashing / LOI testing | 96% or 99% | Suitable for gravimetric analysis and repeated heating cycles; 96% is more economical, while 99% offers lower contamination risk |
| Catalyst preparation | 99% or 99.5% | Inert surface and good resistance to oxidizing and reducing atmospheres |
| Ceramic powder sintering | 96% for cost-sensitive use; 99% for demanding use | Higher temperature capability than many charge materials and low reactivity with most ceramic powders |
| Metal melting (Al, Cu, Au, Pt, Ag, and other precious metals) | 99.7% | Reduces contamination and helps maintain charge purity during melting |
| Semiconductor precursor calcination | 99.7% or 99.9% | Ultra-low Na / Si / Fe contamination is important for sensitive material processing |
| Teaching / student labs | 96% | Lowest cost option with acceptable performance for educational and non-critical use |
| Budget-sensitive routine testing | 96% | Lowest cost among common high-temperature alumina crucible grades for repetitive basic testing |
💡 Cost Tip: 99.7% alumina costs ~40-60% more than 96%. For non-analytical applications, 96% delivers excellent performance at lower cost.
| Application | Recommended Shape | Reason |
|---|---|---|
| TGA/DSC micro samples | TGA pan with vented lid | Fast response; controlled vapor release |
| General calcination | Cylindrical, low-form | Fast heat-up; easy powder loading |
| Volatile samples / drafts | Cylindrical with stepped lid | Reduces vapor loss; calms boundary layer |
| Melting & clean pouring | Spouted crucible | Controlled decanting; reduces drips |
| Trace recovery / ICP prep | Pointed-bottom crucible | Concentrates residues; low rinse volume |
| Parallel DoE / batch runs | Rectangular crucibles | Dense packing; better furnace utilization |
When Alumina Crucibles May Not Be Optimal
If any of the cases below match your process, our engineers can recommend a better-fit ceramic option.
(Ti, Zr, rare earths)
phosphoric acid
Types of Alumina Crucible
Alumina ceramic crucibles can be produced in various shapes, including cylindrical, rectangular, conical alumina crucible with lid and aother shapes. We also custom-machined geometries according to your drawings.
Alumina Ceramic Crucible Shapes
round bottomed alumina crucible
For liquid analysis and sample melting, it increases surface area for more uniform heating and helps prevent spillage.
Rectangular Alumina Crucible
Rectangular alumina ceramic crucible supports predictable heat distribution and DoE repeatability in lab and pilot furnaces.
cylindrical alumina crucible
Cylindrical alumina crucible provides stable temperature fields and repeatable results in lab and pilot furnaces
Conical alumina Ceramic crucible
Tapered alumina crucible guides condensate downward, reduces wall deposits, and improves recovery in small-batch melts..
Pointed bottom alumina crucible
Pointed Al₂O₃ crucibles concentrate residues at the tip for low-volume rinsing and higher recovery in trace ICP/ICP-MS.
Alumina crucible with lid / cover
A fitted cover reduces vapor loss and splatter, improving mass balance and sample recovery during heating cycles.
Trapezoid Alumina Ceramic Crucible
Trapezoid alumina crucible reduces “cold corners” versus rectangular types for more uniform exposure and repeatable results.
Alumina Crucible with Spout
An alumina ceramic crucible with a pour spout lets you decant the liquid while solids settle, improving pellet and crystal recovery after heating.
Thermal Analysis Consumables
TGA alumina crucible
Alumina TGA crucibles provide a low-reactivity sample holder that helps keep mass-change measurements clean during thermal analysis.
DSC Alumina Crucible
Alumina DSC crucibles and lids suit high-temperature thermal analysis of inorganic samples, with shape and cup volume matched to your method.
Not sure which shape? Send your application for help
Alumina Crucible Specification & RFQ
Standard Alumina Crucibles
ADCERAX supplies alumina crucibles from 3 ml to 4000 ml in cylindrical, rectangular forms and other shapes, with optional lids and drawing-based machining.
| Capacity | Shape | Dimensions | Grades | Lid |
|---|---|---|---|---|
| 5 ml | Cylindrical | Ø20 × 18 mm | 99%, 99.7% | Flat / Stepped |
| 30 ml | Cylindrical | Ø35 × 35 mm | 96%, 99%, 99.7% | Flat / Stepped |
| 50 ml | Cylindrical | Ø40 × 40 mm | 96%, 99%, 99.7% | Flat / Stepped |
| 100 ml | Cylindrical | Ø55 × 50 mm | 96%, 99%, 99.7% | Flat / Stepped |
| 250 ml | Cylindrical | Ø75 × 80 mm | 96%, 99% | Flat / Stepped |
| TGA 70 μl | TGA Pan | Ø6 × 4 mm | 99.7% | Vented |
| DSC 40 μl | DSC Pan | Ø5 × 3 mm | 99.7% | Flat |
Need a size not listed? Custom alumina crucibles can be reviewed according to capacity, dimensions, purity, lid design, working temperature, sample chemistry, and quantity.
Alumina Crucible RFQ Checklist
– Shape / product form (cylindrical, rectangular, boat, with lid, TGA/DSC cup)
– Dimensions or capacity (OD / ID / height, or volume)
– Alumina grade or purity requirement
– Working temperature and heating cycle
– Atmosphere (air / inert / vacuum / reducing / corrosive)
– Lid / bottom / vent requirement
– Quantity (trial and repeat)
– Drawing or old-part photo (for custom parts)
– Required documents (COA / material certificate / dimensional report)
Alumina Crucible Applications & Uses
ADCERAX alumina crucibles are used wherever samples, powders or small melts must be held through high-temperature steps without contaminating the result. Match your application as below, then send the details for an engineering review.
Small alumina sample cups and crucibles for thermal-analysis workflows. Cup volume, lid style and instrument context decide fit — see our TGA and DSC crucible pages for exact options.
Heating, drying and ashing of samples in muffle and box furnaces. Tell us your sample type, peak temperature and atmosphere so we can confirm a suitable alumina grade and shape.
Calcination of powders, catalysts and ceramic/composite precursors, plus small-batch sintering. Share your powder chemistry and whether the material is reactive or volatile, so form and wall thickness can be reviewed.
High-temperature sample holders, boats and trays for tube, muffle and box furnaces. Share your furnace type and load so shape and capacity can be matched.
Not sure which fits?
Send your sample chemistry, working temperature, atmosphere and shape, and our engineers will recommend a suitable crucible before quoting.
Custom Alumina Crucibles — Built to Your Drawing
Most alumina crucible requirements are application-specific, so ADCERAX works from your drawing, photo or old part rather than a fixed catalogue. We review custom shapes, sizes, lids and bottoms for laboratory, thermal-analysis and furnace use.
What we can customize ？
Shape: cylindrical, rectangular, boat, tray, conical and with-lid forms.
Size & capacity: outer/inner diameter, height or volume to suit your furnace space and sample load.
Lid, bottom & vent: covers, pour spouts, vent holes and flat or round bottoms where the process needs them.
Material direction: alumina grade reviewed against your working temperature, atmosphere and contamination sensitivity.
How the review works
Send a drawing, photo or old part with shape, size or capacity, working temperature, atmosphere and quantity.
Our engineers review geometry, material direction and tolerance feasibility for your application, and flag anything that needs confirmation.
You receive a feasibility note and quotation; samples or a trial quantity can be discussed before a repeat order.
Why Choose ADCERAX as Your Alumina Ceramic Crucible Manufacturer?
ADCERAX is a focused producer and trusted supplier of alumina crucibles, committed to reliability, fast lead times, and clear technical guidance so you can source the right Al2O3 crucible with confidence.
Competitive pricing with strict quality control from raw material sourcing to final delivery
Professional team providing comprehensive technical support and collaborative design
Small batch orders to large-scale production with complex geometries and tight tolerances
24-hour response and 24-hour dispatch for standard items, 3-7 weeks for custom orders.
Alumina(Al2O3)Crucible Factory-ADCERAX
ADCERAX is a professional China crucible alumina manufacturer offer high-performance components with tight tolerances (±0.1mm-5mm) and custom geometries. Using advanced forming methods and CNC machining, we deliver precision-engineered solutions for electronics, chemical, and high-temperature applications.
- 99.7% high-purity alumina for stable performance
- Custom parts based on your drawings or samples
- Fast prototyping (7–15 days) & flexible MOQ
- ISO-compliant quality control & inspection reports
- Direct engineering support from design to delivery
This table highlights our core technical strengths, including material options, tight tolerances, and advanced manufacturing methods. We offer tailored solutions to meet diverse industrial requirements.
| Technical Capabilities Overview | |
|---|---|
| Material Grades | 96%, 99%, 99.5%, 99.7% Al₂O₃ – high purity for demanding applications |
| Tolerances | ±0.1mm –±5mm– suitable for precision assemblies |
| Forming Methods | Dry pressing, isostatic pressing, extrusion, casting, injection molding |
| Processing | CNC machining, fine grinding, polishing |
| Surface Finish | Polished / Unglazed / Glazed |
| Customization | Drawings, CAD files, or samples accepted for custom parts |
Material & Engineering Review
The required alumina grade, properties and any documentation (COA / material certificate) are defined by your application and confirmed during engineering review for your RFQ. Please specify your purity, working temperature, atmosphere and tolerance requirements when you send an inquiry.
FAQ
Please give the peak temperature, heating and cooling cycle, atmosphere (air, inert, vacuum, reducing or corrosive) and the material in contact. We review these against a suitable alumina grade before quoting, so the crucible matches your process.
Technical alumina is commonly specified at about 96%, 99% and 99.7% Al₂O₃ (IEC 60672-3 classes C-786 / C-795 / C-799). Tell us your application and the grade for your part is confirmed in the RFQ; documents such as a COA can be confirmed when required.
Yes. Send a drawing, photo or old part with the shape, size or capacity, working temperature, atmosphere and quantity. Our engineers review geometry, material direction and tolerance feasibility, then quote; samples or a trial quantity can be arranged before a repeat order.
Shape follows the process: cylindrical for general heating, boat or tray for powders and ashing, lidded for vapour control, conical or pointed for residue recovery, and TGA/DSC cups for thermal analysis. Use the shape selector above, or send your application and we will recommend a fit.
ADCERAX is a China-based advanced ceramics manufacturer, not a trader, producing custom alumina crucibles to your drawing. Critical dimensions and material can be checked during order review, and documents such as a material certificate or dimensional report can be confirmed when your application needs them.
Send your shape, size or capacity, alumina grade, working temperature, atmosphere, quantity and a drawing or photo (see the RFQ checklist). Small ceramic crucibles are fragile, so they are prepared with protective export packing — share your destination and quantity so packing and handling can be planned.
Find High Quality Alumina Crucibles to Elevate Your Research & Industrial Processes?
Factory-direct Al2O3 crucibles from 3–4000 ml, cylindrical or rectangular, optional lids, and machining up to ±0.1 - ±5mm. Get a firm price & lead time within 24 hours.
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