Assay Equipment Accessories & Consumables
High Purity Alumina Ceramic Combustion Boat for Tube Furnaces and Material Synthesis
Item Number : KT-CZ
Price varies based on specs and customizations
- Maximum Operating Temperature
- 1800°C
- Material Composition
- 99.7% High-Purity Alpha-Al2O3
- Bulk Density
- ≥ 3.92 g/cm³
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Product Overview
This high-purity ceramic boat is an indispensable laboratory vessel engineered for high-temperature thermal processing, chemical vapor deposition, and precise sample calcination. Fabricated from premium-grade sintered corundum, the consumable provides unyielding structural stability and superior thermal shock resistance within horizontal and vertical tube furnaces. Its dense, non-porous surface prevents molten slags, fluxing agents, and reactive vapors from infiltrating the matrix, thereby preserving critical baseline integrity during analytical workflows.
Designed primarily for advanced research laboratories, semiconductor fabrication lines, and metallurgy pilot plants, the vessel accommodates sensitive powders, metal precursors, and inorganic compounds. By placing independent raw materials in separate vessels along the furnace tube, researchers can precisely regulate reactant distribution, volatile mass transfer, and gas-phase diffusion pathways. Whether conducting catalyst synthesis, battery cathode calcination, or controlled atmosphere annealing, this consumable delivers dependable containment across rapid thermal cycles.
Engineered to withstand harsh operating environments up to 1800°C, the product maintains exceptional mechanical stiffness and dimensional repeatability under vacuum and aggressive gaseous atmospheres. It exhibits near-total chemical inertness when exposed to volatile vapors like phosphorus pentasulfide and hot transition metal catalysts. Procurement teams and laboratory managers gain an exceptionally durable, cost-effective consumable that minimizes baseline drift and prevents cross-contamination across demanding experimental protocols.
Key Features
- Superior Thermal Shock Endurance: Manufactured through precision isostatic pressing and high-temperature firing, the crystalline matrix tolerates rapid ramp-up and cool-down cycles without microcracking, spalling, or structural fatigue.
- Exceptional Chemical Inertness: Formulated from high-purity alpha-alumina, this vessel resists corrosive attack from acidic fluxes, molten metals, reducing gases, and reactive phosphorus vapors, eliminating unwanted sample-substrate cross-reactions.
- Optimized Gas Diffusion Architecture: Low-profile sidewalls and flat, uniform base geometries facilitate laminar process gas flow over reactant beds, promoting homogeneous vapor-phase reactions and complete thermal penetration.
- Ultra-Dense Microstructure: A bulk density exceeding 3.90 g/cm³ and near-zero apparent porosity eliminate melt infiltration, enabling effortless residue cleaning and reducing trace carryover between analytical iterations.
- High Temperature Creep Resistance: Exceptional mechanical flexural strength at elevated temperatures guarantees that the vessel retains its profile under heavy powder payloads without sagging or warping across multi-day dwell cycles.
- Contaminant-Free Sintered Matrix: Meticulous raw material grading ensures minimal alkali and silica trace impurities, preventing baseline drift in spectrographic analyses and eliminating foreign dopant diffusion during semiconductor processing.
- Universal Tube Furnace Compatibility: Standardized dimensional tolerances allow seamless insertion, spatial zoning, and magnetic or manual retrieval using alumina and quartz push rods inside working tubes of various internal diameters.
Applications
| Application | Description | Key Benefit |
|---|---|---|
| Chemical Vapor Deposition (CVD) | Serves as an inert solid precursor carrier inside horizontal quartz tube furnaces during 2D material synthesis, such as graphene and transition metal dichalcogenide growth. | Prevents precursor contamination and provides predictable vapor generation rates through controlled evaporation surfaces. |
| Solid-State Battery Synthesis | Accommodates sulfur-based solid electrolytes and precursors exposed to aggressive phosphorus pentasulfide vapors at elevated sintering temperatures. | Exhibits zero chemical reactivity against volatile sulfide species, maintaining phase purity and ionic conductivity targets. |
| Catalyst Preparation & Calcination | Holds heterogeneous catalyst supports and impregnated metal salts during high-temperature oxidation, reduction, and activation stages under gas flow. | Chemically neutral substrate ensures no leaching of catalyst poisons or interference with precious metal active sites. |
| Thermal Gravimetric & Combustion Analysis | Acts as a rigid sample vehicle for organic combustion, ash determination, and residual volatile matter quantification in carbonaceous fuels and minerals. | Zero baseline mass loss and non-hygroscopic fired matrix ensure analytical balance reproducibility and trace precision. |
| Rare Earth & Phosphor Annealing | Contains rare earth oxide powders and dopant mixtures subjected to long-duration dwell cycles within controlled hydrogen or inert atmospheres. | Resists high-temperature reduction and grain boundary diffusion, ensuring luminous efficiency and spectral consistency. |
| Metallurgy & Metal Powder Sintering | Supports reactive metal powders, magnetic alloys, and specialized braze alloys during sintering and heat treatment in high-vacuum or inert environments. | Eliminates alloy adhesion to the boat surface, facilitating clean part release and preserving stoichiometric ratios. |
Technical Specifications
| Specification Parameter | Standard Formulation (95% Al2O3) | Premium High-Purity Formulation (99.7% Al2O3) |
|---|---|---|
| Main Chemical Composition | ≥ 95.0% Al₂O₃, balance SiO₂/CaO | ≥ 99.7% Al₂O₃, trace MgO dopant |
| Maximum Continuous Operating Temperature | 1450°C | 1700°C |
| Maximum Intermittent Operating Temperature | 1550°C | 1800°C |
| Bulk Density | ≥ 3.65 g/cm³ | ≥ 3.92 g/cm³ |
| Apparent Porosity | < 0.5% | < 0.1% (Gas-tight) |
| Flexural Strength (Room Temperature) | ≥ 280 MPa | ≥ 360 MPa |
| Coefficient of Thermal Expansion (20-1000°C) | 7.5 × 10⁻⁶ / °C | 8.2 × 10⁻⁶ / °C |
| Thermal Conductivity (100°C) | 22 W/(m·K) | 30 W/(m·K) |
| Acid & Alkali Corrosion Resistance | Excellent | Outstanding |
| Vacuum Outgassing Rate | Negligible | Zero measurable volatile organic / water content |
Dimensional Variant Matrix
| Model Identifier | Length (mm) | Width (mm) | Height (mm) | Wall Thickness (mm) | Nominal Capacity (mL) |
|---|---|---|---|---|---|
| KT-CZ-6015 | 60 ± 1.0 | 15 ± 0.5 | 10 ± 0.5 | 2.0 | 5.5 |
| KT-CZ-8820 | 88 ± 1.0 | 20 ± 0.8 | 12 ± 0.5 | 2.2 | 12.0 |
| KT-CZ-10025 | 100 ± 1.2 | 25 ± 0.8 | 15 ± 0.5 | 2.5 | 22.0 |
| KT-CZ-12030 | 120 ± 1.5 | 30 ± 1.0 | 18 ± 0.8 | 2.8 | 40.0 |
| KT-CZ-14040 | 140 ± 1.5 | 40 ± 1.0 | 22 ± 0.8 | 3.0 | 75.0 |
| KT-CZ-16050 | 160 ± 2.0 | 50 ± 1.2 | 25 ± 1.0 | 3.5 | 130.0 |
Why Choose This Product
- Engineered Microstructural Homogeneity: Produced using refined sub-micron powders and hot isostatic pressing, each vessel exhibits consistent density distribution, eliminating hidden stress concentrations that trigger premature failure.
- Superior Corrosion Resistance: Tested against corrosive halide vapors, volatile metal catalysts, and phosphorus pentasulfide, our inert formulation eliminates chemical degradation and safeguards research batches against substrate leaching.
- Tight Dimensional Quality Control: Rigorous post-sintering gauge inspections ensure exact external tolerances, allowing standardized robotic loading or smooth manual maneuvering inside laboratory furnace process tubes.
- Extensive Material & Geometry Customization: Beyond our catalog of standard combustion boats, we offer tailored wall profiles, compartmentalized reactant partitions, and specialized zirconia or alumina formulations matching distinct experimental thermal boundaries.
- Dedicated Technical Support & Global Supply: Backed by thorough batch quality records and reliable export logistics, our materials engineering specialists ensure steady laboratory inventory and prompt technical assistance.
Contact our engineering sales team today to discuss bulk consumable requirements, request dimensional samples, or configure tailored ceramic solutions for your high-temperature process.
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