On application of heat-conductive plastics in LED technology

Abstract

Abstract.A comparative analysis of the characteristics of heat-conducting plastic was performed. The results of the thermal measurements of two of the same type 3W LED modules installed on heat sink with the same area of heat-dissipating surface made of aluminum and heat-conducting polymer have been presented. It has been shown that the overheating of LED module mounted on the heat-conducting polymer heat sink is 2…3 С higher than that on the aluminum heat sink (thermal conductivity is 20 times higher). The ranges of applicability of the heat-conducting plastics in LED technology have been determined.

Designable core–shell graphite particles for thermally conductive and electrically insulating polymer composites

“…Thermally conductive materials have attracted significant attention in various fields such as electronic packaging, office automated equipment, hand held devices, and automobiles, 1–5 and light emitting diode housing is one of the promising applications in terms of thermal management. 6–8 Almost all of these applications require prevention of excessive temperature increase to ensure stable operation and extend product lifetime. As one of the solutions, thermally conductive materials play a key role in conducting and releasing heat to the atmosphere as part of heat sinks.…”

Analysis, modelling and measurement of the effects of aluminium and polymer heatsinks on conducted electromagnetic compatibility in DC–DC converters

“…A heat conducting plastic is a polymer composite material in which for increased heat conductivity, a high-heat conductivity filler is added [6]. The thermal conductivity of thermoplastics that are intrinsically not thermally conductive can be improved remarkably by adding highly conductive inorganic fillers such as graphite, carbon black, carbon fibres, ceramic, or metal particles [7], [8].…”

“…In addition to the manufacturing advantages offered by such mouldable composites, their relatively low density (around 1000 kg/m 3 as opposed to 2700 kg/m 3 for aluminium) and lower coefficient of thermal expansion (7 ppm/K) can provide a significant weight reduction and improve the reliability of the converter enclosure [10], [11]. Some applications require exclusive use of polymers because of their unique physical properties: flexibility, low cost, lightweight, corrosion resistance, and ease of manufacturing [6], [12]. In order to dissipate and spread heat, a heatsink material having high thermal conductivity is commonly used.…”