Alumina Trays & Saggers: Sintering, Calcination & Debinding Trays for Furnaces
ADCERAX is a china alumina ceramic tray manufacturer specializing in high-temperature components for sintering, calcination, and material processing. We supply high quality alumina tray solutions that align with industrial furnace requirements, offering both standard formats and fully customized designs to match each customer’s loading method, temperature profile, and production environment.
As a factory partner, ADCERAX delivers engineering support, flexible small-batch capability, and fast shipment for urgent or recurring projects.
🤝 Choose alumina trays that deliver stable performance and cleaner cost efficiency—our team is ready to assist.
1730°C
Max Operating Temp(99.7% Purity)
Stable for Sintering, Calcination & Thermal Cycling
Dimensional Accuracy
Low Warpage for Consistent Furnace Loading
Factory Direct Supply & Fast Global Shipping
What is Alumina Tray?
Alumina ceramic tray is a high-temperature ceramic fixture made from sintered Al₂O₃, designed to hold components or powder batches during thermal processes such as sintering, calcination, and heat treatment. Its role is to provide a stable, chemically inert platform that withstands repeated furnace cycles without interacting with the materials being processed.
By maintaining structural integrity and resisting chemical reactions across a wide range of industrial and laboratory thermal environments, an alumina tray enables consistent processing conditions and controlled material behavior throughout the heating cycle.
Standard Alumina Trays in Stock — 24-Hour Dispatch
The following sizes are available for immediate dispatch. Custom sizes quoted within 24 hours.
| Type | Size (L×W×H mm) | Grade | Stock Status |
|---|---|---|---|
| Rectangular Tray | 100×50×20 | 99% | ✅ In Stock |
| Rectangular Tray | 150×100×25 | 99%, 99.7% | ✅ In Stock |
| Rectangular Tray | 200×150×30 | 99% | ✅ In Stock |
| Round Tray | Ø100×20 | 99% | ✅ In Stock |
| Round Tray | Ø150×25 | 99% | ✅ In Stock |
| Sagger | 100×100×50 | 99% | ✅ In Stock |
| Sagger | 150×150×80 | 99% | ✅ In Stock |
Alumina Ceramic Tray Properties & Benefits
Alumina trays deliver stable performance in high-temperature environments by maintaining structural integrity, resisting chemical interaction, and minimizing deformation across repeated furnace cycles. Their low thermal expansion, high mechanical strength, and clean, inert surfaces ensure consistent heating behavior and reliable results in sintering, calcination, and other demanding thermal processes.
Alumina Tray Technical Data
| Property | Typical Value | Notes for Users |
|---|---|---|
| Purity Options (Al₂O₃) | 95% / 99% / 99.7% | Most trays for sintering use 99%–99.7% |
| Max Operating Temperature | 1450°C (95%) / 1680°C (99%) / 1730°C (99.7%) | Based on continuous use |
| Flatness / Warpage Control | ≤0.3–0.5% over length | Critical for multi-layer loading |
| Dimensional Tolerance | ±0.1–0.2 mm | Depends on size & machining |
| Density | 3.75–3.93 g/cm³ | Higher purity → higher density |
| Load Capacity | Light-to-medium load (process dependent) | Engineering validation recommended |
| Thermal Shock Behavior | Good with controlled heating/cooling | Avoid rapid quenching |
| Atmosphere Compatibility | Air / inert / vacuum | Not recommended for strong reducing atmospheres |
| Cycle Life | 50–300+ cycles | Depends on load, furnace, and temperature profile |
- This chart displays the typical properties of the alumina crucible tray used in our standard products. Please note: Customized parts may have adjusted characteristics depending on production methods, with specific parameters determined by the stabilizer type and formula chosen for your application.
Advantages of Alumina Tray
Alumina trays maintain structural stability at high temperatures, supporting reliable use in sintering, calcination, and thermal cycling.
The Al₂O₃ body stays stable in oxidizing, inert, and vacuum atmospheres, reducing contamination during processing.
Low thermal expansion and creep resistance help alumina trays stay flat through repeated furnace cycles.
Alumina trays perform well in box furnaces, tube furnaces, kilns, and laboratory systems.
When to Choose Alumina Trays for Your Application？
Alumina trays are the standard choice for holding powders, green bodies, and small components during high-temperature sintering, calcination, and debinding processes. Their chemical inertness and dimensional stability make them ideal for clean, repeatable furnace workflows.
Alumina Trays Are the Best Choice When
| Your Application Requirement | Why Alumina Trays Excel | Recommended Configuration |
|---|---|---|
| Powder calcination & conditioning | Chemically inert surface; no reaction with powders; uniform heat distribution | 99% flat tray or rectangular tray |
| MIM / PM debinding & sintering | Withstands binder burnout atmospheres; no contamination to parts | 99% or 99.7%; sagger for atmosphere control |
| Battery cathode/anode calcination | High purity prevents lithium compound contamination; stable geometry | 99.7% high-purity tray |
| Catalyst preparation & activation | Inert surface prevents catalyst poisoning; reusable many cycles | 99% rectangular tray |
| Technical ceramics firing | No reaction with alumina/zirconia green bodies; maintains flatness | 99%; sagger for protection |
| Laboratory R&D firing | Clean, repeatable results; easy handling; many cycle reuse | Round tray or small rectangular |
| Multi-layer kiln loading | Stackable design; low warpage maintains alignment through cycles | Rectangular with reinforced walls |
| Protected atmosphere firing | Enclosed sagger design shields contents from furnace gas flow | Alumina sagger with lid |
- Best For:Flat loading; batch sintering; kiln furniture
- Key Advantages:Large surface area; stackable; easy handling
- Applications:Powder calcination, MIM parts, ceramic green bodies
- Best For:Tube furnace loading; continuous processing
- Advantages:Elongated shape fits tube furnaces; easy slide-in/out
- Applications:CVD/sintering in tube furnaces, sample transport
- Best For:Contained samples; melting; TGA/DSC
- Advantages:Enclosed walls contain powders/melts; lid options
- Applications:Metal melting, thermal analysis, small-batch calcination
- Best For:Protected atmosphere; batch isolation
- Advantages:Enclosed design shields from furnace gas; stackable
- Applications:Debinding, atmosphere-sensitive materials
💡 Selection Tip: For tube furnaces, use boats. For box furnaces with flat loading, use trays. For contained samples or melts, use crucibles. For atmosphere protection, use saggers.
Tray vs Boat vs Crucible: Which Alumina Container Do You Need?
Choosing the right container shape affects loading efficiency, heat distribution, and handling. Here’s a quick guide:
When Alumina Trays May Not Be Optimal
If any of the cases below match your process, our engineers can recommend a better-fit ceramic option.
(H₂, CO)
alumina stable, but consider graphite or molybdenum fixtures
(>300°C/min)
consider silicon carbide trays
thin walls
contact us for reinforced design
High Quality Alumina Tray Types
ADCERAX supplies high quality alumina trays in multiple shapes, including round trays, square trays, rectangular trays, saggers, and custom-shaped carriers designed for various furnace loading patterns and batch styles. Standard sizes are available, and tailored configurations can be produced according to drawings or process requirements.
Customized alumina trays are tailored to furnace layouts, loading patterns, and part geometries for stable operation and predictable results.
- Geometry tailored to match your furnace loading envelope
- Configurable wall height, thickness, and corner design
- Optional surface, slot, and bottom-profile customization
Alumina saggers protect powders and shaped parts during high-temperature processing while supporting even heat distribution.
- Enclosed design protects powders from contamination and disturbance
- High strength to withstand stacking loads in multi-layer firing
- Customizable bottom, wall profile, and vent geometry
Alumina rectangular trays support sintering, calcination, and powder processing with even heating and reliable high-temperature stability.
- Optimized for batch layouts with long-part or row-based loading
- Improved directional heat flow control along the long axis
- Reinforced longer-side walls for higher batch capacity
Alumina round trays support sintering, calcination, powder conditioning, and small-part firing with even heating and stable handling.
- Uniform radial heat distribution for circular loading patterns
- Reduced corner-stress risk during thermal cycling
- Smooth circular edges for safer manual and automated handling
Looking for High-Precision Alumina Trays for Your Thermal Processing Workflow?
Factory-direct alumina trays for sintering, calcination, powder processing, and batch firing. Available in round, square, rectangular, and saggar designs with optional custom machining. Receive a firm quote and lead time within 24 hours.
Alumina Ceramic Tray Applications
Alumina trays are used across industrial and laboratory workflows for powder calcination, debinding, drying, sintering, and thermal processing of metals, ceramics, battery materials, catalysts, and research samples.
Powder Metallurgy & MIM Parts
Applications: High quality alumina trays are used for debinding, calcination, drying, and sintering of metal powders and small formed parts.
Challenges: Manufacturers often face tray breakage, part deformation from uneven airflow, contamination from low-purity trays, and delays caused by slow replenishment.
ADCERAX Solutions: ADCERAX offers reinforced, high-purity alumina trays that withstand repeated firing, hold their shape, and reduce contamination. Improved geometries help stabilize airflow, while foam-in-box packaging cuts transport breakage and stock programs enable fast 24-hour dispatch for stable furnace operation.
⚙️CASE: ADCERAX offers reinforced, high-purity alumina trays that withstand repeated firing, hold their shape, and reduce contamination. Improved geometries help stabilize airflow, while foam-in-box packaging cuts transport breakage and stock programs enable fast 24-hour dispatch for stable furnace operation.
Technical Ceramics Manufacturing
Applications: Alumina ceramic trays are used for drying, calcination, debinding, and sintering of green bodies, substrates, and small structural parts where stable support and clean thermal processing are required.
Challenges: Factories often face tray warping after repeated heating, contamination that affects fired part purity, dimensional inconsistency that disrupts shrinkage control, and breakage during handling or transit.
ADCERAX Solutions: ADCERAX offers high-purity, rigid alumina trays that hold their shape through repeated firing and keep surfaces clean for advanced ceramic bodies. Stable geometries improve firing consistency, while foam-in-box packaging reduces shipping damage. Stock programs support fast 24-hour dispatch for urgent production runs.
⚙️CASE: ADCERAX offers high-purity, rigid alumina trays that hold their shape through repeated firing and keep surfaces clean for advanced ceramic bodies. Stable geometries improve firing consistency, while foam-in-box packaging reduces shipping damage. Stock programs support fast 24-hour dispatch for urgent production runs.
Battery Materials & Catalysts Processing
📍Applications: Alumina trays are used for powder drying, precursor calcination, phase conditioning, and controlled-atmosphere heating where purity and stable thermal behavior are essential.
💥Challenges: Producers often face contamination that alters powder chemistry, tray cracking from thermal shock, uneven heating that affects material uniformity, and delays caused by slow replenishment or inconsistent tray sizes.
✅ ADCERAX Solutions: ADCERAX supplies dense, high-purity alumina trays with stable thermal response and clean surfaces that protect sensitive powders. Precise dimensions support automated loading, while foam-in-box packaging reduces transit damage. Stock programs allow 24-hour dispatch to keep continuous production running.
⚙️CASE: A Korean battery-material plant experienced purity drift and tray cracking during long calcination cycles. After shifting to ADCERAX high-purity trays with improved thermal stability, contamination events fell by over 70% and calcination uniformity improved across multiple production batches.
Laboratory & R&D Furnaces
📍Applications: China alumina trays are used for small-batch sintering, sample calcination, drying, and thermal conditioning during material testing and repeated DOE runs.
💥Challenges: Labs often struggle with limited tray sizes, surface contamination from basic ceramics, frequent tray failures under repeated heating, and long waiting times for replacements that delay experiments.
✅ ADCERAX Solutions: Labs often struggle with limited tray sizes, surface contamination from basic ceramics, frequent tray failures under repeated heating, and long waiting times for replacements that delay experiments.
⚙️CASE: ADCERAX provides clean, stable alumina trays with reliable thermal performance for multi-material studies and rapid furnace cycling. High-purity bodies reduce contamination, while upgraded packaging and stock availability help ensure fast, uninterrupted lab workflows.
One-stop Customized Alumina Tray supplier
We specialize in alumina tray customized solutions based on customer drawings, samples, or specific loading requirements. Custom shapes, wall profiles, corner designs, and bottom structures can be produced to match different furnace layouts and batch styles. The typical lead time for customized alumina trays is 3–9 weeks, depending on design complexity and machining needs.
Customization Options
Extra-large / Extra-small diameters, non-standard thicknesses, and ultra-long / ultra-short lengths.
Provide higher - level dimensional accuracy and concentricity control than the standard.
Flanges, steps, threads, drilling holes, grooves, etc.
Adjust the material according to the application requirements.
Polish and grind the surface to achieve a specific surface roughness.
Customization Process
Send us your drawing, CAD file, or physical sample with material grade, dimensions, tolerances, and quantity. Our engineers will evaluate the design and provide a detailed quotation with lead time and pricing.
Once the quote is approved, we proceed with sample prototyping (1–50 pcs) if needed, for testing and validation.
After sample approval or direct confirmation, we begin batch manufacturing using CNC machining, sintering, and polishing. All parts undergo dimensional checks, material purity testing, and surface finish inspection.
Finished products are securely packed and shipped via DHL/FedEx/UPS or your preferred method. We support global delivery with full documentation.
Why Choose ADCERAX as Your Alumina Tray Manufacturer?
ADCERAX is a dedicated high quality alumina ceramic tray manufacturer, supporting both standard formats and customized geometries for diverse furnace workflows. Our team provides reliable manufacturing, clear engineering coordination, and stable lead times so you can source the right alumina tray for your process with confidence.
Factory Direct & Competitive Pricing
Direct manufacturer eliminating intermediaries for cost-effective solutions without compromising quality.
Expert Engineering Support
20+ years of B2B experience providing unparalleled technical support and collaborative design.
Flexible Customization
Agile manufacturing for small-batch customization and rapid prototyping capabilities.
Quality Control
Stringent quality measures from raw material inspection to final product testing.
24/7 Technical Support
24-hour response guarantee with dedicated support for global clientele.
500+ Satisfied Customers
Trusted by global customers for advanced ceramic materials and precision components.
China High Quality Alumina Tray Factory-ADCERAX
Alumina Tray Processing Capacity
ADCERAX manufactures alumina trays in-house—from raw Al₂O₃ powder forming to high-temperature sintering and precision CNC machining. Full internal control of forming, density, and dimensional consistency ensures stable performance for sintering, calcination, and powder-processing workflows.
🔷 In-House Forming & Sintering: Alumina powder is shaped by dry-pressing, isostatic pressing, or slip-casting, then sintered at controlled temperatures to achieve consistent density, strength, and firing stability across trays, saggers, and rectangular carriers.
🔷 CNC Precision Machining: 5-axis CNC machines finish grooves, slots, corner structures, and bottom profiles with machining tolerances up to ±0.05–0.1 mm, enabling precise fit with furnace shelves, fixtures, and loading patterns.
🔷 Flexible Production Scale: Supports prototypes, small batches, and high-volume orders. Standard alumina trays are available in round, square, rectangular, and sagger types, with no strict MOQ for customized designs.
Alumina Ceramic Tray Quality & Certifications
FAQ
Most high quality alumina trays are produced in 95–99.7% purity. Higher purity improves thermal stability, reduces contamination risk, and increases service life in repeated sintering or calcination cycles.
Choosing the appropriate alumina tray purity for laboratory use depends on the maximum firing temperature, the sensitivity of your materials, and the consistency required across repeated thermal cycles.
Quick Purity Selection Guide
| Purity | Max Temp | Best For | Cost |
|---|---|---|---|
| 95% | 1450°C | General heating, sample prep, pre-firing | ★ Low |
| 99% | 1680°C | Standard sintering, calcination, R&D furnaces | ★★ Medium |
| 99.7% | 1730°C | Battery materials, high-purity powders, precision firing | ★★★ Premium |
In most laboratories, 99% alumina is the preferred starting point, while 99.7% alumina is recommended for research involving sensitive materials or tight reproducibility requirements.
An alumina ceramic tray maintains dimensional accuracy under continuous firing because of its low thermal expansion and strong creep resistance, ensuring stable performance over many furnace cycles.
Yes. We offer alumina tray customized solutions including special wall profiles, reinforced corners, slots, grooves, and bottom structures based on your drawings or samples.
You can wholesale industrial-grade alumina trays directly from ADCERAX, a trusted china alumina ceramic tray manufacturer offering consistent quality, controlled high-temperature sintering, and competitive factory pricing. We supply round, square, rectangular, and sagger-style alumina trays for industrial sintering, calcination, and powder-processing workflows, with stable density, flatness, and long service life. Send your dimensions, purity requirements, and quantity to info@adcerax.com to receive a fast wholesale quotation and delivery schedule.
A china alumina tray can be used in box furnaces, pusher kilns, tube furnaces, vacuum furnaces, and lab sintering systems due to its stable structural performance in diverse thermal environments.
You can get the high quality and fair price alumina ceramic tray by sending your tray size, purity grade, and quantity to ADCERAX. As a China-based alumina ceramic tray supplier, we provide fast factory-direct quotations for both standard and custom alumina trays. Email your requirements to info@adcerax.com, and our team will reply with a clear price within 24 hours.
You can rely on ADCERAX if you need a dependable supply alumina ceramic tray manufacturer that also provides strong engineering support. We produce alumina trays through controlled forming, high-temperature sintering, and precision machining to ensure consistent density, flatness, and dimensional accuracy. Our engineering team assists with drawing review, furnace matching, structural optimization, and custom design, helping you select the right purity, wall thickness, and geometry for your workflow. With stable production capacity, competitive factory pricing, and experience serving industrial and laboratory applications, ADCERAX is a proven partner for long-term alumina tray supply.
A high quality alumina ceramic tray generally lasts from dozens to several hundred cycles depending on purity, firing temperature, loading weight, and heating/cooling rate. Higher-purity trays typically offer longer service life.
Yes, many customers replace graphite or SiC trays with high quality alumina trays when they need cleaner surfaces, non-reactive behavior, or compatibility with oxidation environments. Alumina is ideal for clean-powder processing and non-carburizing atmospheres.
You can purchase alumina tray for sale directly from ADCERAX, a China alumina ceramic tray supplier offering factory-direct pricing, engineering support, and both standard and custom designs.
Get in touch with us
We believe that Adcerax will become your best partner!
Please fill in your contact information in the form or call us.
*Our team will answer your inquiries within 24 hours.
*Your information will be kept strictly confidential.
info@adcerax.com
Telphone: +(86) 0731-74427743
WhatsApp: +(86) 19311583352
Within 24 hours
