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Alumina Interlocking Beads

Alumina beads, also known as alumina interlocking fish spine beads, are versatile and perfect for applications requiring high temperature and electrical insulation. These beads come in a variety of bore sizes and densities to accommodate different needs. Alumina beads, which are resistant to abrasion, are the go-to choice when you need to shield wires from heat while maintaining the ability to manipulate the wire’s position. Their interlocking fish spine design enables easy connection and shaping, enhancing their versatility. Interlocking alumina beads find use in numerous applications, especially those necessitating continuous electrical insulation. They are commonly used in air or vacuum systems, shielded coaxial vacuum cabling, 3D printers, and projects that require complex layout patterns, among others.
Outside Diameter: 2.79mm
Inside Diameter: 1.47mm
Length: 2.79mm
Quantity: 100 piece
Technical Name: Alumina
Formula: Al₂O₃
Density: 3.9g/cm³
Product Shape: Interlocking
CAS Number: 1344-28-1
UOM Code: 679-615-71
SKU: 1000022413
Product Code: AL60-BE-000135
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£317.88
each
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Technical Data Sheet
Safety Data Sheet

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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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