High Quality Alumina Tray Customized for Sintering and Heat Treatment Applications

Customized alumina tray engineered for sintering, calcination, and lab workflows; available as a lapped, slotted, or V-groove alumina crucible dish sized to your drawing.

Catalogue No. AT-AS-205
Material Al₂O₃
Purity  88%-99.7%
Maximum Working Temperature 1600(96%)–1730°C(99.7%)
Dimensions/Sizes Download PDF
24H Standard Dispatch
Small Batch Support OEM
Factory Direct
Expert Engineering Support

Alumina trays—also called alumina dishes, sintering trays, and kiln furniture—provide flat, clean, high-temperature support for parts during debinding, sintering, calcination, and heat treatment. High-purity Al₂O₃ supports stable geometry at high temperature with low contamination risk.

Advantages of Alumina Trays

  • Flat Loading Efficiency: Large-area trays provide stable, level support that maximizes furnace loading density and reduces wasted chamber space.
  • Warp-Resistant Design Options: Customizable with V-grooves, pockets, or ribs that distribute weight evenly and minimize part sticking or surface print-through during sintering.
  • Clean Process Interface: Smooth, lapped surfaces on alumina trays reduce contamination points, ensuring sensitive materials like electronic ceramics or cathode powders maintain their required purity.

 

Alumina Ceramic Tray Properties

Property Unit 99.7% Al₂O₃ 99.5% Al₂O₃ 99% Al₂O₃ 96% Al₂O₃
Color   Ivory White Ivory White Ivory White Ivory White
Density g/cm³ 3.94 3.9 3.83 3.6-3.75
Water Absorption % 0 0 0 0
Hardness Mohs Hardness 9.1 9 9 8.8
Flexural Strength (20°C) Mpa 330 320 300 260
Compressive Strength (20°C) Mpa 2300 2300 2210 1910
Maximum Operating Temperature °C 1730 1700 1680 1450
Thermal Expansion Coefficient(25°C to 800°C) 10⁻⁶/°C 7.6 7.6 7.6 7.6
Thermal Conductivity (25°C) W/(m·K) 29 27 24 22
Dielectric Strength (5mm thickness) AC-kv/mm 22 21 19 15
Dielectric Loss at 25°C@1MHz --- < 0.0001 < 0.0001 0.0003 0.0004
Dielectric Constant at 25°C@1MHz --- 9.8 9.7 9.5 9.2
Volume Resistivity (20°C) Ω·cm³ >10¹⁴ >10¹⁴ >10¹⁴ >10¹⁴
Volume Resistivity (300°C) Ω·cm³ 2*10¹² 2*10¹² 4*10¹¹ 2*10¹¹

Alumina Crucible Tray Specifications

Type 1-Rectangular Alumina Trays with slotted

size for tray

Item NO. Volume Length (mm) Width (mm) Height (mm) Thickness (mm)
TE-AS-205 64 100 100 13 5
TE-AS-206 80 100 100 15 5
TE-AS-207 120 100 100 20 5
TE-AS-208 64 100 81 28 5
TE-AS-209 22 100 100 15 6
TE-AS-210 60 115 60 9 6
TE-AS-211 58 115 60 7 6
TE-AS-212 297 120 120 40 6.5
TE-AS-213 161 127 127 21 5
TE-AS-214 270 128 128 25 5
TE-AS-215 355 135 135 35 9
TE-AS-216 575 145 145 55 11
TE-AS-217 49 150 150 18 10
TE-AS-218 300 155 155 28 10
TE-AS-219 350 200 105 30 10
TE-AS-220 1634 220 180 80 14
TE-AS-221 1400 230 230 45 12
TE-AS-222 1752 230 300 50 12
TE-AS-223 1080 230 165 60 12
TE-AS-224 1467 248 155 62 13
TE-AS-225 3000 250 250 100 10
TE-AS-226 1137 295 195 55 10
TE-AS-227 2565 315 158 83 13
TE-AS-228 4100 320 320 60 10
TE-AS-229 6000 320 320 75 10
TE-AS-230 6500 320 320 85 10
TE-AS-231 8900 320 320 110 10
TE-AS-232 7500 320 320 110 14
TE-AS-233 3900 320 320 60 14
TE-AS-234 5000 320 320 75 15
TE-AS-235 5000 320 320 80 15
TE-AS-236 6000 320 320 85.5 14
TE-AS-237 7000 320 320 100 15
TE-AS-238 5186 320 320 85 15
TE-AS-239 10000 330 330 120 13
TE-AS-240 10700 330 330 130 13
TE-AS-241 7900 330 330 100 12.5
TE-AS-242 8000 330 330 100 13
TE-AS-243 8200 330 330 100 12
TE-AS-244 50 63 57 30 6
TE-AS-245 56 100 100 12 5
TE-AS-246 507 150 150 50 10
TE-AS-247 100 160 160 15 8.5
TE-AS-248 350 200 100 30 8.5
TE-AS-249 6900 210 210 200 10
TE-AS-250 4000 220 220 120 10
TE-AS-251 2500 225 161 104 11
TE-AS-252 8000 285 285 160 12.5
TE-AS-253 7600 300 300 110 10
TE-AS-254 11000 300 300 200 10
TE-AS-255 7000 300 300 100 10
TE-AS-256 6000 300 300 175 12
TE-AS-257 5400 300 300 110 12
TE-AS-258 8000 300 300 150 12.5
TE-AS-259 3000 320 320 48 10
TE-AS-260 2800 320 320 48 14
TE-AS-261 12000 330 330 150 10

 

Type 2-  Rectangular Alumina Trays

Size for tray

 

Item Length(mm) Width(mm) Height(mm) Thickness(mm) Purity(%) Capacity(ml)
AT-AS-205 63 57 30 6 80-99 50
AT-AS-206 100 100 12 5 80-99 56
AT-AS-220 150 150 50 10 80-99 507
AT-AS-222 160 160 15 8.5 80-99 100
AT-AS-223 200 100 30 8.5 80-99 350
AT-AS-225 210 210 200 10 80-99 6900
AT-AS-226 220 220 120 10 80-99 4000
AT-AS-228 225 161 104 11 80-99 2500
AT-AS-234 285 285 160 12.5 80-99 8000
AT-AS-236 300 300 110 10 80-99 7600
AT-AS-237 300 300 200 10 80-99 11000
AT-AS-238 300 300 100 10 80-99 7000
AT-AS-239 300 300 175 12 80-99 6000
AT-AS-240 300 300 110 12 80-99 5400
AT-AS-241 300 300 150 12.5 80-99 8000
AT-AS-243 320 320 48 10 80-99 3000
AT-AS-251 320 320 48 14 80-99 2800
AT-AS-259 330 330 150 10 80-99 12000

 

Type 3- Round Alumina Trays with slotted

size for round tray

Item Capacity(ml) Outer Diameter(mm) Inner Diameter(mm) Height(mm) Purity (%)
AT-AC-182 152 63 51 30 80-99%
AT-AC-183 51  70  60  24  80-99%
AT-AC-184 127  50  40  106  80-99%
AT-AC-185 142  50  40  118  80-99%
AT-AC-186 169 100 87 35 80-99%
AT-AC-187 210  78  57  89  80-99%
AT-AC-188 215  69  50  118  80-99%
AT-AC-189 243  73  50  135  80-99%
AT-AC-190 362  80  59  143  80-99%
AT-AC-191 373  70  50  200  80-99%
AT-AC-192 459  85  75  109  80-99%
AT-AC-193 566  86  69  160  80-99%
AT-AC-194 583  87  69  165  80-99%
AT-AC-195 610  107  82  128  80-99%
AT-AC-196 1206 180 160 70 80-99%
AT-AC-197 2155 200 170 110 80-99%
AT-AC-198 3188 305 285 60 80-99%
AT-AC-199 6330 260 240 150 80-99%

 

Type 4- Round Alumina Trays

Size

Alumina Round Trays
Item No. Volume (ml) Outer Diameter (mm) Height (mm)
TE-AC-136 80 75 27
TE-AC-134-1 80 75 27
TE-AC-114 15 47 13
TE-AC-115-1 15 47 13

 

*Note: The table above shows only some standard specifications. For more specifications, please refer to the complete product catalogue or contact us for customization.

 

Alumina Ceramic Tray Packaging

Shock-absorbing foam with individual wrapping

Alumina Ceramic Tray Packaging

 

Customized Alumina Ceramic Tray Applications

  • MIM / Powder Metallurgy Sintering

    ✅ Key Advantages

    1. Loader efficiency: V-groove / pocketed customized alumina tray increases part density per layer without contact scuffing.
    2. Thermal stability: maintains geometry through debinding and sintering cycles up to ~1700 °C.
    3. Clean surface chemistry: minimizes reactions vs. metallic fixtures.

    ✅ Problem Solved

    During MIM scale-up, a tray redesign (V-grooves + lapped surface) cut contact marks and raised per-run loading by ~12% while holding dimensional targets; alumina’s inert surface reduced post-sinter finishing steps, improving first-pass yield.

  • Battery Cathode Calcination / Coating

    ✅ Key Advantages

    1. Low contamination support for NMC/LFP processing where trace impurities matter.
    2. Temperature margin in air atmospheres with stable trays.
    3. Configurable slots to enhance gas exchange around powder liners.

    ✅ Problem Solved

    During cathode pilot trials, switching to high-purity customized alumina trays reduced contamination risk and stabilized thermal exposure, cutting re-runs and aligning with alumina’s inertness under oxidizing conditions.

  • Laboratory Muffle Furnace / QA

    ✅ Key Advantages

    1. Repeatable flat support for ashing/annealing with easy sample placement.
    2. Broad chemical compatibility during process deviations. Lakeside Pottery
    3. Fast changeover via modular tray sizes.

    ✅ Problem Solved

    Labs running mixed materials improved turnaround by adopting two customized alumina tray sizes matching their furnace shelf spacing, reducing reposition errors and improving uniformity over existing ad-hoc dishes.

Alumina Tray Usage Instructions

  • Before first use

    Always pre-dry customized alumina trays after unpacking to avoid thermal shock from absorbed moisture. A typical practice is heating for 4–6 hours at around 90–100 °C, with longer times for thicker sections.

  • Operation

    Place trays on a stable support surface inside the furnace, keeping safe clearance from heating elements. Avoid uneven loading, sharp temperature changes, or sudden transfers between hot and cold zones to minimize warpage and cracking.

  • Maintenance

    Clean tray surfaces regularly to remove sintering residues or powder build-up. Rotate or flip trays after several cycles to equalize stress distribution. Only use release agents or separating powders when specifically required for your process.

  • Storage

    Store alumina trays in a dry, cushioned environment. Always use spacers or protective pads between stacked trays to prevent chipping or edge wear. Keep them away from corrosive chemicals or humid conditions.

  • Handling precautions

    Avoid dropping or knocking trays against hard surfaces, as edges can be fragile. When moving hot trays, use appropriate refractory tongs or insulated supports.

  • Common misuses & fixes

    1. Over-tight stacking → use ceramic spacers or pillars to maintain airflow.
    2. Direct flame or gas impingement → reposition away from burners or apply shielding.
    3. Un-dried trays put directly into hot furnace → always pre-dry to prevent spalling.
    4. Use of incompatible separating powders → confirm with process data to avoid contamination or sticking.

Alumina Tray FAQ

  1. Q: Are the trays resistant to acidic or alkaline materials?
    A: Yes. Alumina resists most acids and bases except hydrofluoric acid and concentrated strong alkalis.
  2. Q: Can you manufacture trays based on our furnace slots and drawings?
    A: Yes, we accept custom shapes, dimensions, and reference markings based on furnace loading specifications.
  3. Q: Do the trays deform after multiple heat cycles?
    A: Our trays are tested for ≥50 standard sintering cycles with no visible warpage when operated within the rated temperature and load.
  4. Q: How long is the customized alumina tray production lead time?
    A: Standard trays: 3–5 days dispatch. Custom trays: 2–6weeks, depending on complexity.
  5. Q: Do you supply high quality alumina trays for industry?
    A: Yes.ADCERAX supplies high quality alumina ceramic tray for industrial sintering, heat treatment, and material processing. We support both standard models and customized alumina tray designs, and also handle wholesale orders to ensure stable supply for large-scale production.
  6. Q: What is the alumina ceramic tray price?
    A: The alumina ceramic tray price depends on several key factors, including tray size, wall thickness, purity grade (such as 96% or 99.7% Al₂O₃), and whether special machining like lapping, grooves, or slots is required. Order quantity also plays a role—small test batches are priced per piece, while wholesale purchases benefit from lower unit costs.
  7. Q: Can I purchase alumina trays directly from the manufacturer?
    A: Yes, ADCERAX is a China-based manufacturer and supplier of alumina trays, offering both standard sizes and drawing-based customization. Buying directly from ADCERAX helps ensure product traceability and will get a fair price to control costs.

What Our Customers Say Alumina Tray

  • ⭐️⭐️⭐️⭐️⭐️
    We purchased a customized alumina ceramic tray at a fair price; the stable flatness has increased our degreasing output on the MIM production line.
    -- Eric M., Process Engineer, Mid-West Components Inc.
  • ⭐️⭐️⭐️⭐️⭐️
    As a laboratory alumina tray supplier, ADCERAX delivered clean, burr-free alumina trays that fit our muffle furnace. I will buy again.
     — Dr. S. Patel, Lab Manager, Northshore Materials Lab
  • ⭐️⭐️⭐️⭐️⭐️
    For battery cathode trials, the alumina tray manufacturer provided V-groove patterns that kept pellets separate; surface quality improved.
    -- Kobayashi, Materials R&D Lead, Sakura Energy
  • ⭐️⭐️⭐️⭐️⭐️
    We compared several alumina ceramic tray manufacturers, and ADCERAX made the process easier with clear drawing support. Their in-stock alumina trays helped us quickly fill a rush order.
    -- H. Fischer, Purchasing Supervisor, Rheinwerk Ceramics
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High Quality Alumina Tray Customized

ADCERAX is a China-based alumina ceramic tray manufacturer, offering wholesale and customized high-quality alumina trays. What You Can Specify for Customise:

  • Tray shape: rectangular, round, multi-slot, solid base or perforated
  • Size: any outer/inner dimensions up to 500 mm long
  • Thickness: thinner walls down to 2 mm or reinforced support of 6 mm
  • Edge Finish: Chamfered, raw edge, rounded
  • Surface: sintering, glazed, or polished
  • Labelling: Laser-marked position reference or material labelling

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