Alumina Ceramic Crucibles & Boat with Hole for Controlled Gas Flow and Cleaner Combustion Runs

ADCERAX supplies alumina ceramic boats with hole formats from small lab boats to long rectangular boats, and we can customize length/width/height plus hole configuration to match your combustion tube geometry and insertion method.

Catalog No. TE-AS-117-2
Material Al2O3
Purity 96% 99% 99.5% 99.7%
Density 3.6–3.93 g/cm³
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An Alumina Ceramic Boat with Hole is a high-temperature sample boat (tray) made from alumina ceramic that includes one or more holes in the body (or tail area). The hole is used to manage gas flow and venting during heating, so the sample heats more consistently and the process is easier to control in tube furnaces and combustion-style test setups.

Advantages of Alumina Ceramic Crucibles with a Hole

  • Hole-featured airflow control
    The integrated hole is engineered to guide oxygen or process gas directly through the sample zone inside combustion tubes, reducing local oxygen deficiency and improving burn repeatability between runs. This structure helps stabilize reaction behavior when sample mass or composition varies.

  • Combustion-specific geometry options
    Tail-and-hole boat designs allow precise positioning within combustion tubes and analyzers, ensuring consistent insertion depth and orientation. This geometry minimizes sample displacement during loading and supports repeatable hot-zone exposure across operators and shifts.

  • High-temperature capability for hole boats
    Alumina ceramic boats with hole are specified for sustained operation at temperatures up to approximately 1650 °C, making them suitable for combustion analysis, ashing, and high-temperature sample preparation without structural deformation under routine thermal cycles.

  • Wide dimensional coverage for method standardization
    Available formats range from 50 × 5 × 5 mm micro boats to 300 × 40 × 30 mm long boats, allowing laboratories to standardize boat geometry across different test methods, furnace zones, and sample scales while keeping loading rules consistent.

  • Published density reference for durability screening
    A documented bulk density range, such as 3.6–3.93 g/cm³, is commonly used as a practical indicator of ceramic body compactness, helping users assess resistance to chipping, warping, and fatigue during repeated high-temperature combustion cycles.

 

Alumina Ceramic Boats with Hole 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 Crucibles with Hole Specifications

Item NO. length (mm) width (mm) height (mm)
TE-AS-071 100 84 35
TE-AS-072 100 56 35
TE-AS-073 100 43 26
TE-AS-074 100 27 27
TE-AS-075 100 24 17
TE-AS-075-1 100 20 20
TE-AS-075-2 100 27 27
TE-AS-075-3 103 28 30
TE-AS-075-4 100 43 25
TE-AS-075-5 100 24 17
TE-AS-075-6 100 27 25
TE-AS-075-7 100 43 26
TE-AS-075-8 100 56 35
TE-AS-075-9 100 50 35
TE-AS-075-10 100 56 35
TE-AS-076 73 30 22
TE-AS-076-1 73 30 22
TE-AS-076-2 70 30 22
TE-FA-001 300 70 30
TE-FA-002 200 80 35
TE-FA-003 200 11 12
TE-FA-004 105 23 20
TE-FA-005 100 30 25
TE-FA-006 90 10 10
TE-FA-007 80 30 20
TE-FA-008 88 12 10

 

Alumina Boats with Hole Packaging

  • Individual protection: each crucible and lid separated to prevent chipping during transit
  • Foam + carton structure: rigid cushioning around rims and lids (common damage points)

Alumina Boats with Hole Packaging

Applications of Alumina Ceramic Crucibles with Hole

  • Elemental Analysis Labs (CHN / Combustion Methods)

    ✅Key Advantages

    1. Method-fit usage: alumina boats are listed for CHN elemental analysis combustion workflows.

    2. High-heat tolerance: combustion boats with hole are described for temperatures upward to 1650°C.

    3. Repeatability spec signal: published density ranges like 3.6–3.93 g/cm³ support consistent handling across repeated cycles.

    ✅ Problem Solved

    A contract lab running combustion-based elemental tests needed interchangeable boats across shifts without re-tuning insertion habits. They standardized a hole-boat format and required a documented density range (3.6–3.93 g/cm³) to keep breakage and handling variance low. They also screened for a combustion-hole boat temperature capability stated around 1650°C to stay the method heat limits. After standardizing size, they reduced mixed-format loading errors and stabilized routine throughput.

  • Industrial QC Labs (Ashing / LOI / Powder Conditioning)

    ✅Key Advantages

    1. Application breadth: alumina boats are listed for ashing/combusting powders in lab and testing work.

    2. Scale flexibility: examples range from 0.4 mL micro boats to 200 mL long boats, supporting different batch sizes.

    3. High-temperature screening: many alumina furnaceware/boat listings reference operating ceilings up to 1750°C for high-temperature applications.

    ✅ Problem Solved

    A materials QC team needed one container family for both small validation runs and larger composite sampling. They selected standardized boat sizes from 50×5×5 mm (0.4 mL) up to 300×40×30 mm (200 mL) to keep loading rules consistent across technicians. For high-heat schedules, they screened boats with stated maximum operating temperatures up to 1750°C so they would not split SKUs between furnace programs. This simplified purchasing and reduced method-to-method container switching.

  • Materials R&D (Thermal Analysis / High-Temperature Sample Prep)

    ✅  Key Advantages

    1. Instrument adjacency: alumina boats are listed for TGA/DSC and other thermal analysis tasks.

    2. Defined geometry library: commercial boat-crucible listings provide many L×W×H options (e.g., 100×20×20 mm, 171×127×50 mm).

    3. Hole concept supports process control: hole/vent features are positioned for controlled gas exposure in combustion-style setups and related heating workflows.

    ✅  Problem Solved

    An R&D team ran small screening tests, then scaled to larger samples for process confirmation. They chose a consistent boat family using standard sizes such as 100×20×20 mm (100 mL) and 171×127×50 mm (1.1 L) so sample placement and hot-zone exposure stayed comparable across scale-up. For runs requiring controlled gas exposure, they used a hole-featured boat format tied to their tube airflow model and loading SOP. This reduced rework caused by geometry changes between small and large trials.

 

Usage Instructions for Alumina Ceramic Boat with Hole

  • Installation /Setup

    1. Confirm the boat slides into the tube/fixture without scraping; tail should align with insertion tools.
    2. Keep the hole zone unobstructed before each run (powder bridges or residue can change airflow).
    3. Use a consistent loading position (front/middle) to match your method’s hot-zone exposure.

  • During Use

    1. Avoid dropping cold boats onto hot fixtures; place boats on a preheated support when possible.
    2. For combustion workflows, keep sample mass and distribution consistent so the hole-featured gas path stays repeatable.
    3. Do not overfill; leave headspace so gas can move across the sample rather than tunnel through one spot.

  • Storage

    1. Store boats tail-up or in separators so the handle zone does not bear stacking weight.
    2. Keep dry; moisture can increase startup stress in high-heat schedules.

  • Cleaning

    1. Let the boat cool gradually before handling; avoid rapid quenching.
    2. Remove residues with non-metal tools to protect rim and hole edges.
    3. If chemical cleaning is used, validate compatibility with your analytical background limits before routine adoption.

  • Common Mistakes + Fixes

    1. Mistake: Powder blocks the hole and changes combustion behaviour.
    Fix: Reduce fill height, break up agglomerates, and check the hole opening before insertion.
    2. Mistake: Tail chips during repeated insertion.
    Fix: Specify a reinforced tail thickness or tapered end geometry and avoid side-loading when pushing into the tube.
    3. Mistake: Results drift between operators due to inconsistent sample placement.
    Fix: Define a fixed loading position and use one standardized boat size for each method.

Alumina Ceramic Crucible & Boat with Hole FAQ

  1. Q: What is an alumina ceramic boat with a hole used for?
    A: An alumina ceramic boat with a hole is commonly used in combustion and furnace workflows where controlled gas exposure and stable sample placement are needed.
  2. Q: Is an alumina ceramic crucible with a hole suitable for CHN elemental analysis?
    A: Yes, alumina crucibles are listed for CHN elemental analysis combustion applications.
  3. Q: What temperature can an alumina ceramic boat with hole withstand?
    A: Combustion boats with holes are described for temperatures upward to 1650°C in combustion contexts.
  4. Q: How do I select the right size alumina ceramic boat with hole?
    A: Start from your tube/fixture constraints, then choose a standardized L×W×H format; listings show options from 50×5×5 mm to 300×40×30 mm.
  5. Q: Can I order a custom hole diameter on an alumina ceramic boat with hole?
    A: Yes. Hole diameter, count, and location are common specification items for custom alumina boat designs.
  6. Q: Can the alumina ceramic boat with a hole be used for ashing or powder calcination?
    A: Yes, alumina boats are listed for ashing/combusting powders and general lab testing tasks.

Alumina Ceramic Crucible & Boat with Hole Reviews

  • ⭐️⭐️⭐️⭐️⭐️
    We standardized an alumina ceramic boat with a hole for CHN runs. Sample placement is consistent, and we spend less time troubleshooting variable burn behavior.
    -- Emily Carter | Lab Manager | NorthRiver Analytical Services
  • ⭐️⭐️⭐️⭐️⭐️
    We compared several suppliers and chose ADCERAX as the alumina ceramic boat with hole source for repeat orders. Pricing was acceptable for bulk replenishment, and the lot-to-lot consistency met our internal checks.
    -- Markus Vogel | Procurement Manager | Rhein Materials Testing GmbH
  • ⭐️⭐️⭐️⭐️⭐️
    The tail-and-hole geometry made insertion stable in our combustion tube. We also requested a specific hole location and got a clean fit without modifying our holder.
    -- Jason Liu | Application Engineer | AlloyWorks QC Laboratory
  • ⭐️⭐️⭐️⭐️⭐️
    Our custom alumina ceramic boat with a hole arrived matched to our L×W×H requirement. The hole edge finish reduced powder hang-up compared to our previous stock.
    -- Sofia Ramirez | Purchasing Specialist | Summit Contract Lab
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Custom Alumina Ceramic Crucibles with Hole

ADCERAX supports customization of alumina ceramic crucibles with hole to ensure consistent fit with your holders, heating programs, and analytical procedures.

  • Crucible geometry
    Outer diameter, inner diameter, height, wall thickness, base thickness for mechanical stability

  • Lid seating & fit design
    Flat seat, step seat, or recessed seat; overlap depth and lid seating tolerance

  • Hole configuration
    Hole diameter, hole position (centred or offset), edge chamfer or radius to reduce chipping and residue buildup

  • Crucible–lid matching
    Lid-to-crucible pairing tolerance; ID/OD fit control for fixed holders or automated loading systems

  • Form factor options
    Cylindrical, conical/high-form, shallow or deep crucible profiles; rectangular formats for furnace boat–style setups

  • Surface condition
    As-fired surface, rim-ground edge, or internally smoothed surfaces for easier residue release and cleaning

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