Ceramic Boats for Combustion Analysis, Tube Furnaces & Industrial Sintering
ADCERAX manufactures ceramic boats for high-temperature combustion, evaporation and furnace use. High-purity alumina, silicon carbide, boron nitride and silicon nitride ceramic boats run reliably up to 1700°C+ with low contamination. Standard labware ceramic boats are in stock, while custom ceramic boats for tube furnaces and wafer processes are made to your drawing.
Partner with ADCERAX to secure a stable, high-performance ceramic boat supply that protects your product quality and lowers your total operating cost.
What is Ceramic Boat?
A ceramic boat is a shallow, open ceramic tray used to hold materials during high-temperature processes such as combustion, evaporation, calcination and sintering. Unlike a deep crucible, a ceramic boat has a low, elongated shape that spreads the sample into a thin layer, so heat, gas and vapors can contact the material evenly.
High-purity ceramics reduce contamination, protect accuracy, and support stable firing.
Tight dimensional control improves loading repeatability, stacking, and handling consistency.
Thermal shock resistance helps ceramic parts withstand repeated heating and last longer.
Engineering support helps match the right ceramic grade and shape, with related accessories available.
How to Choose Your Ceramic Boat — Quick Decision Guide
Answer these questions to quickly identify the right ceramic boat for your application:
Step 1: What Is Your Application?
Application is the first key factor in selecting the right ceramic crucible. It helps narrow the best material and typical size range.
| Application | Best Material | Typical Size |
|---|---|---|
| C/S Analyzer (LECO, Eltra, Horiba) | Alumina (99%+) | 80×12×10mm, 100×15×12mm |
| O/N/H Analyzer | Alumina (99.5%+) | Various standard sizes |
| Ash / LOI Testing (coal, coke) | Alumina (99%+) | Shallow rectangular |
| Tube furnace powder calcination | Alumina or SiC | Match tube ID (50-100mm width typical) |
| Battery cathode sintering (LFP, NCM) | High-purity Alumina (99.5%+) | Large rectangular, stackable |
| MIM / PM debinding & sintering | Alumina or SiC | Custom to part size |
| Evaporation / thin film deposition | Boron Nitride (BN) | Small, specialized shapes |
| Reactive metal / vacuum processes | Boron Nitride (BN) or Si₃N₄ | Custom |
Step 2: What Is Your Maximum Temperature?
Not sure which boat fits? Tell us your analyzer model, furnace type, and temperature — we’ll recommend the right ceramic boat.
| Feature | Ceramic Boat | Ceramic Crucible | Ceramic Tray |
|---|---|---|---|
| Shape | Shallow, elongated, open top | Deep, cylindrical or rectangular | Flat, wide, very shallow |
| Depth | Low (10-25mm typical) | High (30-100mm+) | Very low (5-15mm) |
| Best For | Combustion analysis, tube furnaces, thin powder layers | Melting, deep powder charges, liquid containment | Spreading parts, large flat samples, kiln furniture |
| Gas/Heat Access | Excellent (thin layer exposed) | Limited (deep charge) | Excellent (flat spread) |
| Typical Applications | C/S analyzer, LOI, ash testing, calcination | Metal melting, sintering, TGA/DSC | Part sintering, drying, setter plates |
Ceramic Boat vs Crucible vs Tray — When to Use Which?
Use this comparison to quickly identify whether a ceramic boat, crucible, or tray is better suited to your process and sample geometry.
Ceramic Boat
- Shape: Shallow, elongated, open top
- Depth: Low (10-25mm typical)
- Best for: Combustion analysis, tube furnaces, thin powder layers
- Gas/Heat Access:Excellent (thin layer exposed)
- Typical Applications: C/S analyzer, LOI, ash testing, calcination
- Shape: Deep, cylindrical or rectangular
- Depth: High (30-100mm+)
- Best for: Melting, deep powder charges, liquid containment
- Gas/Heat Access:Limited (deep charge)
- Typical Applications: Metal melting, sintering, TGA/DSC
- Shape: Flat, wide, very shallow
- Depth: Very low (5-15mm)
- Best for: Spreading parts, large flat samples, kiln furniture
- Gas/Heat Access:Excellent (flat spread)
- Typical Applications: Part sintering, drying, setter plates
Ceramic Boat Material Options — Quick Comparison
Most common choice: High-purity alumina (99%+) covers 80%+ of ceramic boat applications due to its excellent balance of temperature capability, purity, and cost.
- Max Temp: 1700-1800°C
- Key Advantage:Best cost/performance, high purity options
- Best For:C/S analyzers, LOI, general furnace work
- Max Temp: 1380-1600°C
- Key Advantage:Balanced hardness and toughness
- Best For:Wear parts, grinding media, general industrial
- Max Temp: 1000°C (air) / 2300°C (vacuum)
- Key Advantage:Max toughness + good hardness
- Best For:Impact applications, biomedical, pump seals
- Max Temp: 1200-1400°C
- Key Advantage:Max hardness + moderate toughness boost
- Best For:Cutting tools, nozzles, semiconductor parts
Common Ceramic Boat Sizes — Quick Reference
Need a specific size? Standard lab sizes are in stock. Custom sizes available in 2-4 weeks.
| Application | Typical Size (L×W×H mm) | Notes |
|---|---|---|
| C/S Analyzer (LECO) | 80×12×10, 100×15×12 | Standard lab sizes, in stock |
| C/S Analyzer (Eltra, Horiba) | Various OEM-compatible sizes | Confirm analyzer model |
| Ash / LOI Testing | 50×30×15, 80×40×20 | Shallow rectangular |
| Tube Furnace (Ø50mm tube) | ~40×20×15 (fit tube ID) | Custom to tube diameter |
| Tube Furnace (Ø80mm tube) | ~70×30×20 (fit tube ID) | Custom to tube diameter |
| Battery Cathode Sintering | 150×100×25, 200×150×30 | Large rectangular, stackable |
Properties of Ceramic Boats
Ceramic crucible boats made mainly from high-purity alumina, with options in mullite, cordierite and silicon carbide, offer a robust combination of mechanical strength, thermal shock resistance and chemical stability for demanding high-temperature processes.
Alumina Ceramic Boat Technical Data
| Property | Unit | 96% Al₂O₃ | 99% Al₂O₃ | 99.5% Al₂O₃ | 99.6% Al₂O₃ | 99.7% Al₂O₃ | 99.8% Al₂O₃ | 99.9% Al₂O₃ | 99.99% Al₂O₃ |
|---|---|---|---|---|---|---|---|---|---|
| Alumina content | % | 96 | 99 | 99.5 | 99.6 | 99.7 | 99.8 | 99.9 | 99.99 |
| Density | g/cm³ | 3.75 | 3.88 | 3.89 | 3.91 | 3.92 | 3.93 | 3.95 | 3.98 |
| Flexural strength | MPa | 330 | 360 | 379 | 312 | 313 | 314 | 315 | 320 |
| Hardness | GPa | 11.5 | 13.5 | 14.1 | 23 | 24 | 25 | 26 | 30 |
| Thermal conductivity | W/m·K | 20–25 | 30–35 | 35 | 32–37 | 33–38 | 34–39 | 35–40 | 36–42 |
| Thermal shock resistance ΔT | °C | 150 | 200 | – | 222 | 223 | 224 | 225 | 228 |
| Maximum use temperature (no load) | °C | ≤1600 | ≤1700 | ≤1750 | 1755 | 1760 | 1765 | 1770 | 1800 |
| Dielectric strength | kV/mm | 8–10 | 10–12 | 11–13 | 12–14 | 12–15 | 13–16 | 14–17 | 15–18 |
| Volume resistivity (25°C) | Ω·cm | ≥1×10¹³ | ≥1×10¹⁴ | ≥3×10¹⁴ | ≥5×10¹⁴ | ≥1×10¹⁵ | ≥3×10¹⁵ | ≥5×10¹⁵ | ≥1×10¹⁶ |
Ceramic Boat Products Range at a Glance
Our ceramic boat range includes standard and custom designs for combustion testing, ash analysis, and other thermal processing applications.
Laboratory Ceramic Combustion Boats
Ceramic Combustion Boat
Shallow high-alumina ceramic boats for quick, repeatable combustion and ignition tests in lab furnaces.
Ash Boats for Coal Analysis
ash boats for coal and coke LOI/ash tests, providing stable support and low contamination.
Standard vs Custom Ceramic Boats
Alumina Ceramic Boat
High-purity alumina ceramic boats in standard sizes provide low contamination, stable dimensions and reliable performance.
Customized Alumina Ceramic Boat
ADCERAX offer customized alumina ceramic boats are available when you need special length, wall thickness or loading volume
Not Sure Which Ceramic Boat Fits Your Furnace or Analyzer?
Share your drawing and operating conditions—temperature range, furnace or analyzer type, atmosphere, chemistry and batch volume—and we’ll recommend the most suitable ceramic boat crucible material and design, together with a manufacturable solution you can qualify and repeat.
Ceramic Boats Applications
Boat ceramics are used to hold powders, pellets and small parts in high-temperature processes such as laboratory combustion analysis, evaporation and annealing, as well as furnace sintering of battery materials, magnetic powders, catalysts and other fine chemicals.
Laboratory and Analytical Testing
Ceramic combustion boats and labware ceramic boats are widely used in:
- Carbon/sulfur and oxygen/nitrogen/hydrogen analysis.
- Ash and loss-on-ignition testing in coal, coke, minerals and polymers.
- Small-scale calcination and ceramic evaporation boats operations where stable sample containment is critical.
- Specialized procedures using ceramic porcelain boats for VSS analysis and related methods.
Powder Metallurgy and Metal Injection Molding
Industrial ceramic boats for furnace workloads support:
- Sintering and debinding of pressed powder components and MIM parts.
- Handling of small metal or alloy parts where distortion and contamination must be tightly controlled.
- Use of evaporation boats ceramic designs for certain pre-coating or surface treatment steps.
Lithium Battery Cathode and Anode Materials
Advanced ceramic boats function as carriers for powders in cathode and anode material production:
- Multi-layer powder loading for high-volume continuous kilns.
- High-purity alumina bodies that minimize cross-contamination between batches.
- Durable designs that withstand repeated firing cycles, improving furnace uptime.
Magnetic Materials, Catalysts and Fine Chemicals
Special ceramic systems are required where silicon and related materials are processed at high temperature. Examples include:
- Ferrite and rare-earth magnetic powders, catalyst carriers, pigments and other fine chemicals benefit from clean and stable ceramic boats or boat-type saggers.
- Disposable or disposable ceramic boats annealing options simplify clean changeovers between different chemistries.
High Quality Ceramic Boat Customized
ADCERAX is a China ceramic boat supplier specialising in custom-made boats for laboratory equipment and industrial furnaces. We tailor capacity, shape, wall thickness and material grade to your drawings, while keeping key standard ceramic boat sizes in stock for urgent 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 Work with ADCERAX for Ceramic Boats?
ADCERAX is a China ceramic boat wholesaler, producing custom and standard ceramic boats with controlled materials and tight tolerances. Experienced engineers, responsive sampling and reliable export logistics make ceramic boat sourcing efficient, predictable and easy to support long term.
Competitive pricing with strict quality control from raw material sourcing to final delivery
Professional team providing comprehensive technical support and collaborative design
Small batch orders to large-scale production with complex geometries and tight tolerances
24-hour response and 24-hour dispatch for standard items, 3-7 weeks for custom orders.
China Professional Ceramic Boat Factory-ADCERAX
ADCERAX has been engaged in advanced ceramics for over 20 years and has developed more than 2,000 types of high-temperature components, with a strong focus on ceramic boats made from high-alumina, mullite, cordierite and silicon carbide.
We supply both custom and standard ceramic boats for laboratory analyzers, muffle and box furnaces, tube furnaces and other thermal processes, exporting to more than 50 countries and supporting industrial users and OEMs that require stable, low-contamination and long-life ceramic boat performance.
Ceramic Boats Processing Strength
ADCERAX controls every step, from forming to finishing, to keep ceramic boat walls, rims and bottoms consistent. Tuned sintering profiles and 100% visual checks for cracks or chipping deliver strong, thermal-shock-resistant evaporation boats ceramic that run reliably over many furnace cycles.
CNC Forming Stability & Wall Thickness Control
Dimensional accuracy for ceramic boats is achieved through CNC-assisted forming and machining, keeping wall thickness, straightness and base flatness within tight, repeatable tolerances for reliable furnace loading.
Holding ceramic boat wall variation within ±0.2 mm for stable heating and cooling.
Controlling side-wall straightness and base flatness to ensure smooth stacking and good contact with setters or supports.
Machining rims and ends so ceramic boats fit fixtures and carriers correctly, improving handling strength and alignment.
Clean, Low-Contamination Surface Finishing
Internal and external ceramic boat surfaces are refined to reduce residue build-up, minimise contamination and limit micro-cracks, helping each firing cycle stay stable and easy to clean.
Optimised Ra reduces powder adhesion while preserving suitable wetting in melts and slurries.
Removing sharp rims and micro-chips to lower breakage risk during loading, unloading and tongs handling.
Applying selected finishes where lower porosity, easier cleaning or reduced reaction with the charge is required.
High-Temp Sintering for Service Life & Thermal Shock Resistance
Microstructure density and strength in ceramic boats are developed through controlled high-temperature sintering cycles, tuned to each material system for long life under repeated firing.
Managing ramp and cool-down rates to balance strength, density and resistance to cracking.
Matching soak times and peak temperatures to alumina, mullite, cordierite or SiC ceramic boat materials.
Low open porosity improves chemical stability and cuts powder contamination over many cycles, helping ceramic boats keep purity high.
FAQs About Ceramic Boats
Our standard Alumina Ceramic Boat models, crafted from >99.7% pure alumina, are designed for continuous operation at temperatures up to 1700°C (3092°F). For applications requiring even higher temperatures, please contact us to discuss custom High-Temperature Ceramic Boat solutions.
Absolutely! We specialize in providing Custom Ceramic Boat solutions. If our standard sizes don't meet your specific laboratory furnace dimensions or sample volume requirements, we can manufacture a Laboratory Ceramic Boat to your exact drawings or specifications.
Cleaning methods for your Ceramic Combustion Boat can vary based on the residue. Generally, mechanical removal (gentle scraping with a non-metallic tool) is suitable. For more stubborn residues, heating the Ceramic Boat to a high temperature in an oxidizing atmosphere can burn off contaminants. Avoid harsh thermal shocks during cleaning.
To maximize the lifespan of your Industrial Ceramic Boat, avoid rapid heating or cooling cycles (thermal shock) beyond its specified limits. Ensure even loading of samples and handle the Ceramic Boat with care to prevent mechanical stress or chipping. Regular inspection for any signs of wear or cracking is also recommended.
Ceramic crucible boat is ideal when you want the shallow geometry of a boat but the volume or depth of a small crucible. These hybrid shapes improve loading and heat transfer while still giving enough depth to avoid spillage.
Yes, ADCERAX can supply ceramic boats as matched sets with compatible lids, setter plates and supports. This helps users maintain consistent fit and stacking in the furnace and simplifies spare-part management.
For ceramic boats for furnace applications, we look at furnace type, usable space, loading method and batch weight. In a ceramic boat tube furnace, length, width and wall thickness must match the tube inner diameter and gas flow pattern to avoid collisions and cold spots.
We can supply disposable ceramic boats annealing for light-duty annealing, burn-off or test work where cleaning would be inefficient. For heavier or long-term service, we recommend reusable high-alumina or silicon carbide boats with longer service life.
Yes, ADCERAX can produce ceramic combustion boat for VSS analysis in the sizes and wall thickness your method requires. These boats focus on surface finish and dimensional consistency to keep analytical results stable.
When selecting ceramic boats, focus on a few key checks:
Application & equipment
Lab analyzer, muffle/box furnace or ceramic boats for furnace in production?
For tube furnaces, note tube inner diameter and usable length.
Temperature, atmosphere & chemistry
Working temperature range and gas (air, inert, vacuum, reducing).
Powders or parts in contact with the boat.
This decides the material, for example alumina ceramic boat vs mullite or SiC.
Size, capacity & wall thickness
Required charge volume or powder bed thickness.
Boat length/width/height to fit the furnace with enough gas flow.
Wall thickness strong enough but not too heavy to heat.
Lifetime & standard vs custom
Target cycles and budget: longer life may justify higher-grade boats.
If standard sizes do not fit fixtures or automation, request a customized alumina ceramic boat based on your drawing.
Providing these points to the supplier allows them to recommend the most suitable ceramic boat design quickly.
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