When it comes to high-performance cooling systems, diamonds might just be an engineer’s best friend. Standing head and shoulders above conventional materials like aluminum and copper, which typically have thermal conductivity values around 300 watts per meter per Kelvin, diamonds boast an exceptional rate close to 2,300 watts. While silver can perform at around 400 watts, its high cost makes it less appealing. In contrast, plastics fall behind with thermal conductivity values below 1.
Diamonds offer superior thermal conductivity due to their three-dimensional lattice of carbon atoms. This lattice configuration not only surpasses other cooling materials but does so without electricity flow, as it does not contain the necessary electrons for electrical conductivity. Despite their advantages, diamonds have not been widely used due to their traditionally high cost and challenging manufacturing process.
In recent advancements, however, researchers in Michigan at the Fraunhofer Research Center have made progress in producing diamond materials that can be integrated into electronics. Their method involves growing thin, micrometer-scale diamond membranes on silicon wafers similar to those used in chip production. These thin diamond plates could revolutionize the way we approach cooling in various technologies.
Replacing the insulating layers in chips, batteries, and power electronics like inverters with these diamond films can lead to an improvement in heat dissipation by a factor of 10,000 right at the source of heat generation. The impact is significant, enabling performance enhancements as well as a diverse array of benefits. For instance, battery charging time could be reduced by a factor of five due to the increased efficiency.
Moreover, because rapid heat dissipation results in lower operating temperatures, the use of diamond cooling technology could also extend the lifespan of electronic components and improve their energy efficiency which usually declines with higher temperatures.
Although diamond plates are a premium solution and come with a cost, their application in electronics doesn’t require large quantities. Small, precisely sized plates can be applied directly to the crucial hotspots within devices. Additionally, with the vast availability of carbon necessary for the creation of diamonds, supply is unlikely to be an issue.
With the promising potential of diamond cooling systems in modern electronics, we may soon see devices that are not only more powerful and efficient but also more robust and longer-lasting.
