Open here for our page navigation
Indium Foil and Ribbon
Indium is a soft, malleable and ductile metal which is generally unaffected by air or water but is soluble in acids. It is found only in the form of minor components of various minerals and the pure element is produced by electrolytic reduction in aqueous solution. Indium is found in the earth's crust at a level of 0.049 ppm.
Indium is used in the forms of InAs and InSb within the semiconductor industry in thermistors and transistors. As a result of its physical properties, it is particularly suited to being used as a sealing material in vacuum systems and also as bonding material in acoustic transducers. Indium is also widely used in the manufacture of "fusible" materials, a range of alloys which have low melting points and can be used as thermal fuses and solders.
A principal use is in the forming of electrodes for touchscreens and liquid crystal displays. A transparent conductive coating of Indium oxide and Indium tin oxide is applied as substrates to glass in the manufacture of electroluminescent panels.
Indium foil and indium sheet are regularly used as an extremely efficient heat sink for high temperature and cryogenic applications. The semiconductor industry finds indium useful in the synthesis of semiconductor materials for the manufacture of thin film solar cells.
Formula In
Molecular Weight 114.82
CAS Number 7440-74-6
Appearance Silver-grey solid
Density 7.31 gm/cm3
Melting Point 156.6oC
Boiling Point 2080oC
Electrical Resistivity 8.37 μOhm-cm
Electronegativity 1.7 Paulings
Heat of Fusion 0.781 Cal/gram mole
Heat of Vaporization 53.7 Cal/gram atom at 2080oC
Poisson’s Ratio 0.4498
Specific Heat 0.056 Cal/gm/K at 25oC
Thermal Conductivity 0.818 W/cm/K at 298.2 K
Thermal Expansion 32.1 μm.m-1.K
Young’s Modulus 11 GPa
Hardness (Mohs) 1.2
Our Indium foils and ribbons are available from 99% up to 99.999% pure.
