Gallium-Indium Alloys
Low-melting-point gallium-based alloys used as thermal interface materials and in compound semiconductor applications for automotive electronics.
Overview
Gallium-indium (GaIn) alloys, including eutectic gallium-indium (EGaIn) and galinstan (Ga-In-Sn), are liquid or near-liquid metals at room temperature with exceptionally high thermal conductivity. In automotive applications, they are investigated as next-generation thermal interface materials (TIMs) for managing heat in high-power electronics, particularly EV inverters, power modules, and battery management systems where conventional thermal greases are insufficient. Indium-containing compound semiconductors (InGaN, InGaAs) are also foundational to high-efficiency LED and laser diode technologies in automotive lighting and LiDAR systems.
Automotive Applications
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Properties
Category
Type
Liquid Metal / Semiconductor Alloy
Available Colors
Available Forms
Key Properties
- Very high thermal conductivity
- Liquid at near-ambient temperatures (EGaIn)
- Low toxicity vs mercury
- Excellent wetting of metal surfaces
- High electrical conductivity
Technical Specifications
Density
6.44 g/cm³ (EGaIn)
Sustainability
Sustainability Rating
Indium and gallium are critical raw materials with limited primary supply. Both are largely produced as by-products of zinc and aluminium smelting. Recycling from end-of-life electronics is technically possible but rate is low.