Alumina Round Bottomed Boat Crucible

Formula: Al₂O₃

Form: Crucible

Material: Alumina

CAS Number: 1344-28-1

Commodity: Ceramics

Purity: 99.8%

Goodfellow’s Alumina Round Bottomed Boat Crucibles are high-purity alumina ceramic crucibles with round bottoms and flared sides, ideal for high-temperature materials processing. Available in 6 sizes, they feature excellent thermal shock resistance and chemical inertness. Their high alumina content provides good mechanical strength and resistance to thermal stresses. Typical applications include serving as containers for melting, evaporating, annealing and sintering a wide range of metals, alloys, and other materials in laboratory and industrial environments. With proper care, these versatile crucibles can be reused repeatedly.

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Technical Data Sheet Safety Data Sheet Tolerance Properties

each

Tolerances

Round Bottomed 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