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Formula: Al₂O₃
Form: Crucible
Material: Alumina
CAS Number: 1344-28-1
Commodity: Ceramics
Purity: 99.8%
Goodfellow's Alumina E Beam Crucible is a specialized tool designed for electron beam evaporation processes. Constructed from high-purity aluminum oxide (Al₂O₃), it exhibits excellent thermal resistance up to 1800°C and chemical inertness, ensuring minimal contamination during deposition processes. Its robust structure withstands the intense conditions of electron beam heating while maintaining sample integrity. These crucibles are primarily used in thin-film deposition industries, including optics, semiconductors, and advanced coatings. Specific applications include the deposition of metals like gold or aluminum onto substrates for electronic components or reflective surfaces. In research contexts, alumina E Beam Crucibles facilitate the development of nanostructured materials and innovative thin-film technologies. Their ability to endure extreme conditions while delivering precise results highlights their critical role in advancing both industrial manufacturing techniques and scientific discovery.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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Tolerances

E Beam
Outside Diameter ±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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