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Alumina Pellet Boat Crucible

Formula: Al₂O₃
Form: Crucible
Material: Alumina
CAS Number: 1344-28-1
Commodity: Ceramics
Purity: 99.8%
The Alumina Pellet Boat Crucible is a rectangular ceramic crucible with small concave sections in which pellets can be stored. This crucible is designed to hold metal parts during high-temperature processes like annealing, sintering and calcining. Made from high-purity alumina, it provides excellent thermal shock resistance and corrosion resistance when exposed to molten metals. Its boat shape allows for easy transfer of parts in and out of furnaces. Offering both durability and versatility, the Alumina Pellet Boat Crucible is an essential tool for many heat-treating operations in both research and industry.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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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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