Nano-Composites heat sink for LED light application

    Project Code: 278
    LEDs are semiconductors that emit energy in the form of light when excited by an electric current. Though LEDs do not radiate heat to their outside environment, they generate heat at the p-n junction which can tend to cause fatigue, thermal degradation, and a shorter useful life. Significant improvements in luminous efficacies in light-emitting diodes (LEDs) and current densities in power electronics necessitate efficient and cost-effective thermal management solutions. The easiest way of limiting the temperature is in accordance with the principle of increasing the surface of the component to be cooled by using suitable media, such as a good conducting heatsink.
    By Universiti Teknologi Petronas
Project Overview

The primary industrial issue with LED applications is its thermal management. Reduction in the temperature corresponds to an exponential increase in the reliability and life expectancy of the device. Heat in LED-based lighting systems can lead to three main consequence; (1) decrease of lumen output over time, (2) de-rating of flux over time; and (3) increase of failure rates. To assess the quality and heat sink performance, it is just as important to gain an understanding about the production-related conditions which should be observed right from the start of the projection phase because they have considerable influence on the overall quality. Carbon nanotubes(CNTs) are one of the most promising nanomaterials in advanced composites due to the remarkable mechanical, electrical and thermal properties among others. In this study, inventor has fabricated a high-performance heat sink composite material made of copper matrix reinforced by multiwalled carbon nanotubes up to 2.5 Vol. % using metal injection molding technique. Comparison of different copper heat sink materials with different fabrication techniques shown below and proved uniqueness of metal injection molding technique.

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