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Alumina Boat

Alumina Boat

Alumina boats are small, boat-shaped containers made of alumina ceramic material, also known as aluminum oxide (Al2O3). Alumina is a highly durable and heat-resistant material that is widely used in various industrial applications, such as electrical insulation, refractory lining, and high-temperature processing.

Alumina boats are typically produced through a process of shaping and sintering of alumina powder, resulting in a dense and uniform ceramic structure. They can vary in size, shape, and surface finish depending on the intended use and application.

Alumina boats have excellent mechanical and electrical properties, including high strength, hardness, and thermal conductivity. They are also resistant to chemical corrosion, making them suitable for use in harsh and corrosive environments.

Alumina boats are commonly used as crucibles for high-temperature heating and melting applications, such as in the production of metals, alloys, and ceramics. They are also used as sample holders for high-temperature analysis techniques, such as thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC).

In addition, alumina boats are used as a container for holding and transporting chemicals and samples in laboratory and industrial settings. They are also used in semiconductor manufacturing, for deposition and etching processes, and in the production of optical components.

Overall, alumina boats are a reliable and versatile material that offer excellent performance and longevity in a variety of high-temperature and corrosive environments. They are widely used in industrial, scientific, and research settings for their exceptional properties and durability.


Catalog No. CERAMICS
Size Customized
Material Al2O3
Purity 95% 99% 99.7%
Density 3.8~3.9 g/cm3


At CG Material, we offer high quality with Alumina Boat exceptional purity and precision in terms of size. Our products range in diameter from 1mm to 100mm and have a purity level of up to 99.8%. We also provide custom manufacturing options for special shapes to meet specific needs.



Alumina Boat Specifications 

Composition AL97 AL98
AL2O3 Content 97% 99.80%
Color White Ivory
Tensile 30 Kpsi 32 Kpsi
Flexural 55 Kpsi 60 Kpsi
Compressive 300 Kpsi 330 Kpsi
Density 3.7 g/cc 3.92 g/cc
Hardness 13.8 HV, Gpa 18 HV, Gpa
Thermal Conductivity 25 W/(m K) 32 W/(m K)
C.O.T.E. 77 In / In°C (x10^7) 78 In / In°C (x10^7)
Working Temperature 1500 °C 1750 °C
Dielectric Constant 9.5 9.8
Volume Resistivity >10^14 Ohm-cm >10^15 Ohm-cm
Dielectric Strength 16 KV/mm 20 KV/mm

*This chart just demonstrates the typical properties of common alumina materials we use to produce our alumina parts. Please notice that the property for customized alumina parts could vary due to different process. CG Material could provide alumina ceramic products produced under your specified instruction or do the best to meet customers’ requirements.

Alumina Boat Applications

Aluminum oxide boat can be used in the following applications:

• High alumina combustions boats are ideal for chemists, metallurgists, and other scientists involved in high-temperature work demanding contamination-free results.
• Used with refractory metals such as molybdenum, platinum, rhodium, tungsten, tantalum and iridium
• Used for making parts for CVD, ion implants, photolithography, and semiconductor parts.
• In traditional industries, alumina ceramics are ideal for products such as injector tubes, gas nozzles, and insulators.
• Used as a material for industrial furnaces due to its ability to maintain its hardness at high temperatures.
• Used as a protector for high-temperature thermal couples.
• Used as a material for the chemical industry due to its high corrosion resistance.



We handle our products with care to ensure they remain in their original condition during storage and transportation and to preserve their quality.



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