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Formula: Al₂O₃
Form: Crucible
Material: Aluminum Oxide
CAS Number: 1344-28-1
Commodity: Ceramics
Purity: 99.8%

Alumina Pellet Boat Crucible

Alumina Pellet Boat Crucible offers exceptional thermal stability and corrosion resistance, owing to its high-purity α-alumina composition and dense microstructure formed through precision sintering. This material maintains integrity at extreme temperatures while resisting chemical attack, making it ideal for high-purity processing environments. Key industries benefiting from these crucibles include advanced ceramics, metallurgy, chemical synthesis, and semiconductor fabrication, where contamination-free handling of materials is critical. Specific applications include supporting pelletized materials during high-temperature reactions, acting as inert containers for thermal processing in controlled atmospheres, and serving as carriers for catalyst or powder treatments. The robust design ensures uniform heating, minimal reaction with contents, and repeatable performance in demanding lab or production settings. In research and innovation, Alumina Pellet Boat Crucible is invaluable for enabling precise thermal treatments, safeguarding sample purity, and extending operational lifespan in harsh processing conditions.
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Tolerances

Pellet Boat
External Width ±10%
External Length ±10%
External Height ±10%

Material Properties for Ceramics

Chemical Resistance
Element Value
Acids - concentrated Good
Acids - dilute Good
Alkalis Good
Halogens Good
Metals Good
Electrical Properties
Element Value
Dielectric constant 9-10.1
Dielectric strength( kV mm⁻¹ ) Oct-35
Volume resistivity( Ohmcm ) >10¹⁴@25
Physical Properties
Element Value
Apparent porosity( % ) 0
Water absorption - saturation( % ) 0
Density( gcm⁻³ ) 3.9
Thermal Properties
Element Value
Melting point( C ) 2100
Upper continuous use temperature( C ) 1700
Specific heat( J K⁻¹ kg⁻¹ ) 850-900@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 26-35@20°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 8@20-1000°C
Mechanical Properties
Element Value
Tensile modulus( GPa ) 300-400
Hardness - Knoop( kgf mm⁻² ) 2100
Hardness - Vickers( kgf mm⁻² ) 1500-1650
Shear strength( MPa ) 330
Tensile strength( MPa ) 260-300
Pultrusions
Element Value
Compressive strength( MPa ) 2200-2600

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