High-Temperature Alumina Crucible with Lid/Cover for laboratory

Alumina Crucible with Lid Applications

• Materials Research- TGA / DSC Sample Analysis

  ✅ Key Advantages

  1. Lid reduces convection around the pan, improving baseline stability in repeated runs.
  2. Controlled venting limits spatter and retains condensables for more consistent curves.
  3 . Tight-fit geometry supports small mass samples without foil improvisation.

  ✅Problem Solved

  A battery-materials lab reported run-to-run mass-loss CV dropping from ~2.3% to ~0.7% after switching to tight-fit covered alumina pans on identical ramp rates (10 °C/min, n=10), improving acceptance of QC lots without extending test time.

• Laboratory Ashing & Loss-On-Ignition (LOI)

  ✅Key Advantages

  1.  Lid reduces airborne particle deposition that skews LOI.
  2. Decreases sample splashing at 550–1000 °C, keeping furnace shelves clean.
  3. Supports step-hold sequences with less mass drift from drafts.

  ✅Problem Solved

  An environmental lab cut re-cleaning time ~35% per batch and achieved LOI repeatability within ±0.15 % on soil samples by using vented lids during 2-step ashing (550 °C/2 h + 900 °C/1 h).

•  Industry -Precious-Metal melts / Ceramic Frit Trials

  ✅Key Advantages

  1. Cover limits oxygen exposure in short holds, reducing oxidation films.
  2. Minimizes micro-spatter that causes cross-contamination between trials.
  3. Supports safer transfers with a defined cover instead of temporary foils.

  ✅Problem Solved

  A jewelry R&D shop reduced scrap trials from 1 in 12 to 1 in 30 when melting 10–30 g alloy buttons; covered crucibles kept flux splash contained and shortened furnace clean-downs by ~40 min per day.

Alumina Crucible with Cover Usage Instructions

• Before First Use

  1. Pre-fire empty crucible and lid at 800–1000 °C for 1 h to remove adsorbed moisture/organics.
  2. Check mating surfaces; if needed, lightly wipe rim with lint-free tissue.

• During Use

  1. Typical ramp suggestion: ≤5 °C/min for small sizes; keep thermal shocks below 150 °C/h equivalent for larger forms.
  2. For vented reactions, use pin-hole lid or offset by ≤1 mm; avoid fully sealing.
  3. Avoid direct flame impingement on rim/lid interface.

• Cleaning & Storage

  1. Allow to cool to <150 °C before handling; avoid cold solvent on hot ware.
  2. Use compatible solvents or ultrasonic bath; avoid aggressive HF-bearing chemistries.
  3. Store lid and cup separately in foam slots to protect the fit.

• Common Mistakes & Fixes

  1. Crack at rim after rapid quench: reduce ramp rate; use thicker-wall spec.
  2. Mass drift in LOI: ensure lid is seated consistently; pre-dry samples.
  3. Lid sticking after glaze splash: choose polished rim or use release setter.

Alumina Crucible with Lid FAQ

1. Q: When should I choose a vented lid vs. a tight-fit lid?
   A: Use a vented for devolatilization and LOI; use a tight-fit when minimizing drafts or spatter is the priority.

2. Q: What tolerance can you hold on the lid fit?
   A: For small sizes, ID/OD/height ±0.1–0.2 mm; larger formats are specified per drawing.

3. Q: What maximum use temperature applies to the alumina crucible with lid on?
   A: 1700–1750 °C typical, subject to furnace type, atmosphere, and hold time.

4. Q: How do I prevent contamination between runs?
   A: Pre-fire, use vented lids for splashy chemistries, and dedicate crucibles per material family.

5. Q: What information do I need to provide for a custom alumina crucible with lid?
   A: To ensure accurate production, please provide a detailed drawing or sample with inner/outer diameter, height, wall thickness, and lid fit type (tight or vented). Indicate the required tolerance range, surface finish (as-fired, polished, or ground), and maximum operating temperature expected in your application. This allows engineers to confirm feasibility and deliver a precise quote.

What Our Customers Say: Alumina Crucible with Lid

• ⭐️⭐️⭐️⭐️⭐️
  “Tight-fit alumina crucible with lid stabilized our TGA runs; CV dropped below 1% on cathode powders.”
  — R&D Manager, Battery Materials, Germany
• ⭐️⭐️⭐️⭐️⭐️
  “Cylindrical covered crucibles kept LOI consistent on cement QC; cleaning time went down noticeably.”
  — QA Lead, Building Materials, USA
• ⭐️⭐️⭐️⭐️⭐️
  “Using covered alumina crucibles for LOI tests reduced mass variation and saved ~30% of furnace cleaning time.”
  — Laboratory Director, Environmental Testing, UK
• ⭐️⭐️⭐️⭐️⭐️
  “Replacement alumina crucible with lids matched previous batches; dimensional spread stayed within ±0.15 mm.”
  — Lab Supervisor, University, Canada