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Borosilicate Glass-Insulated Ultrafine Gold Wire

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Composition: Au Form: Insulated Wire Material: Gold CAS Number: 7440-57-5 Commodity: Precious Metals Purity: 99.99% Insulation: Borosilicate glass
Borosilicate Glass-Insulated Ultrafine Gold Wire features a high-purity (≥99.99%) gold conductor encased in a thin borosilicate glass coating. This combination provides excellent thermal resistance, chemical inertness, and electrical insulation. The borosilicate sheath remains stable during high-temperature processing, making the wire ideal for microelectronic assemblies, high-frequency signal transmission, and semiconductor applications. Common uses include vacuum-sealed interconnects, fine bonding wires for ICs, and instrumentation for extreme environments. Gold ensures minimal resistive loss, while borosilicate glass acts as a reliable dielectric barrier, even under thermal cycling. Studies confirm its performance in shallow doping techniques and high-precision bonding, with added dopants enhancing tensile strength and recrystallization behavior. This wire supports the development of miniaturized, high-reliability components across aerospace, medical, and advanced electronics sectors.
Starting at $1,830.00 each
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Material Properties

Atomic Properties
Element Value
Atomic number 79
Crystal structure Face centred cubic
Electronic structure Xe 4f¹⁴ 5d¹⁰ 6s¹
Valences shown 1,3
Atomic weight( amu ) 196.9665
Thermal neutron absorption cross-section( Barns ) 98.8
Photo-electric work function( eV ) 4.8
Atomic radius - Goldschmidt( nm ) 0.144
Ionisation potential( No./eV ) 1/ 9.22
Ionisation potential( No./eV ) 2/ 20.5
Mechanical Properties
Element Value
Material condition Soft
Material condition Hard
Poisson's ratio 0.42
Poisson's ratio 0.42
Bulk modulus( GPa ) 171
Bulk modulus( GPa ) 171
Tensile modulus( GPa ) 78.5
Tensile modulus( GPa ) 78.5
Hardness - Vickers( kgf mm⁻² ) 20-30
Hardness - Vickers( kgf mm⁻² ) 60
Tensile strength( MPa ) 130
Tensile strength( MPa ) 220
Yield strength( MPa ) 205
Yield strength( MPa ) -
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 2.20@20°C
Temperature coefficient( K⁻¹ ) 0.004@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV ) 0.74
Physical Properties
Element Value
Boiling point( C ) 3080
Density( gcm⁻³ ) 19.3@20°C
Thermal Properties
Element Value
Melting point( C ) 1064.4
Latent heat of evaporation( J g⁻¹ ) 1738
Latent heat of fusion( J g⁻¹ ) 64.9
Specific heat( J K⁻¹ kg⁻¹ ) 129@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 318@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 14.1@0-100°C
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Available Configurations

Properties common to all products in this list

Composition: Au Form: Insulated Wire Material: Gold CAS Number: 7440-57-5 Commodity: Precious Metals Purity: 99.99% Insulation: Borosilicate glass

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Tolerances

Insulated Wire
Conductor Diameter ±10%
Insulation Thickness Nominal
Length +5% / -1%