High-Temperature China Alumina Rectangular Trays for Calcination & Sintering

Al2O3 Rectangular Trays Applications

• Laboratory & Research — Calcination and Ashing

  ✅ Key Advantages

  1. Flat rectangular geometry supports uniform powder layers, improving reproducibility in loss-on-ignition tests (RSD reduced by up to 15%).
  2. High-purity Al₂O₃ structure minimizes contamination in analytical ashing and melting workflows.
  3. Rated for ~1,600–1,700 °C in air, covering standard muffle furnace protocols for R&D labs.

  ✅ Problem Solved

  In university research labs, replacing mixed-metal pans with alumina rectangular trays during calcination reduced residue variability and cut rerun frequency. By aligning with furnace hot zones, the trays maintained consistent mass loss data across ≥1,000 °C protocols, improving reproducibility for analytical projects.

• Powder Metallurgy & Advanced Ceramics — Setter Fixtures

  ✅ Key Advantages

  1. Rectangular tray footprint works as a sintering setter, preventing deformation of pressed parts during firing.
  2. Custom slot/aperture designs enhance airflow, ensuring ±3% uniformity in shrinkage across small sintered parts.
  3. Chemically stable alumina resists reaction marks in reducing or neutral atmospheres during metal/ceramic processing.

  ✅ Problem Solved

  On a pilot sintering line, shifting to rectangular alumina setter trays with slots cut flatness rejects from 18% to under 5%. The custom trays distributed heat evenly and preserved geometry, reducing costly rework while boosting usable output per furnace cycle.

• Functional Materials & Battery Industry — Powder Activation & Drying

  ✅ Key Advantages

  1. Broad tray surface supports large-volume cathode/anode powder drying, improving batch throughput.
  2. Thin-wall rectangular trays shorten heating/cooling ramps, reducing cycle times by 12–15% in activation processes.
  3. Low-soda, high-purity alumina avoids contamination that could impair the electrochemical performance of powders.

  ✅ Problem Solved

  In battery material production, upgrading to alumina rectangular trays for NCM precursor drying improved productivity. The trays’ flat geometry and thermal response allowed faster ramp schedules, cutting batch time by nearly half a shift while ensuring no metallic contamination, directly benefiting yield and downstream electrode consistency.

Alumina Rectangular Tray Usage Instruction

• Use

  1. Always pre-dry alumina rectangular trays before introducing them into high-temperature furnaces to prevent microcracking from residual moisture.
  2. Ramp temperature and cooling rates gradually; avoid thermal shock caused by rapid insertion or removal.
  3. Load powders or components evenly across the flat rectangular surface to maintain balance and reduce localized stress.
  4. When using anti-stick coatings or setter layers, apply a thin, uniform coating to avoid uneven contact marks.

• Storage

  1. After cooling to room temperature, place trays on refractory shelves or ceramic pads; avoid steel benches that may induce thermal stress.
  2. Do not quench trays in water or cool air streams; allow them to cool naturally.
  3. Store trays in foam-lined or padded bins to protect edges from accidental chipping during handling and transport.
  4. Keep separate storage for clean vs. used trays to prevent cross-contamination between different materials or chemistries.

• Cleaning

  1. Remove residues mechanically with soft abrasives (ceramic brush or alumina-compatible media).
  2. Avoid HF-containing solutions and strong fluorides, which aggressively attack Al₂O₃.
  3. For stubborn deposits, apply controlled heating in a clean furnace cycle (burn-off method) before reusing.
  4. Rinse with deionized water, dry thoroughly at 100–120 °C, and inspect for surface cracks before next use.

• Common mistakes & fixes

  1. Over-tight furnace schedules: skipping soak stages causes thermal shock; introduce controlled holding times to protect tray life.
  2. Using incompatible cleaning chemicals: switch to neutral or mildly alkaline detergents; always verify chemical resistance data.
  3. Overloading trays beyond the designed flatness tolerance: keep loads within the recommended thickness spread; heavier parts may require reinforced tray versions.
  4. Re-using chipped trays in precision work: minor edge damage may propagate under stress; retire trays showing cracks or warping to avoid contamination or yield loss.

Alumina Rectangular Trays FAQ

1. Q: Does the tray cause a reaction with metal powders?
   A: No, high-purity alumina is chemically inert in oxidizing and inert atmospheres like argon or nitrogen.
2. Q: What is the expected tray lifespan under daily use?
   A: At 1500°C, daily use, trays operate stably over 200–300 cycles if used properly.
3. Q: Can I purchase alumina rectangular trays directly from the factory?
   A: Yes, ADCERAX is a China-based manufacturer and factory supplying alumina rectangular trays worldwide. We handle both standard sales and customized production.
4. Q: What industries usually buy alumina rectangular trays?
   A: Main buyers include research labs, powder metallurgy factories, and suppliers of high-quality ceramic components for thermal processing.
5. Q: Can alumina rectangular trays be exported to Europe and North America?
   A: Yes. As a China-based manufacturer and wholesaler, we regularly export high-quality alumina rectangular trays to Europe and North America. Our products comply with international shipping standards, and both laboratories and industrial users in these regions rely on customized and standard trays for their thermal processes.
6. Q: How do you control quality during manufacturing?
   A: Our production line uses controlled sintering cycles and inspection of flatness and purity, ensuring trays meet high quality standards before shipment.

Hear From Our Clients for Alumina Rectangular Trays

• ⭐️⭐️⭐️⭐️⭐️
  “We bought high-quality alumina rectangular trays from China for our testing lab. ADCERAX gave us clear drawings before production, and the sales process was smooth with timely delivery.”
  -- Dr. Emily Carter, Lab Manager, EuroMaterials GmbH (Germany)
• ⭐️⭐️⭐️⭐️⭐️
  “Our company imports ceramic parts regularly, and ADCERAX proved to be a reliable China supplier of alumina rectangular trays. The trays matched our specifications, and their sales support helped us finalize a custom batch quickly.”
  -- Ayoub (Purchasing Manager)
  
• ⭐️⭐️⭐️⭐️⭐️
  “We compared several factories and manufacturers before choosing ADCERAX. They offered a reasonable price and supplied high-quality alumina rectangular trays that arrived with consistent dimensions, which improved our furnace loading efficiency.”
  -- Sarah Johnson, Purchasing Officer, Advanced Ceramics Inc. (USA)
• ⭐️⭐️⭐️⭐️⭐️
  “The customized alumina rectangular trays with corner chamfers reduced edge chipping in daily use; repeat orders kept dimensions stable across batches. I am satisfied”
  -- Dr. E. Patel, Lab Manager, OxTech R&D