Many people know the problem of cooling processors and other chips well.As the technological norms for manufacturing decrease, the problem becomes more acute as the energy density increases dramatically.Scientists have found that silicon can only increase the efficiency of heat dissipation by increasing its isotopic purity.Experiments have shown that the \"natural\" heat sink of chips can be increased up to 2.5 times.Image source: Junqiao Wu/Berkeley LabAs you know, all silicon in our nature consists of three stable forms of isotopes: about 92% is silicon-28 (28Si), 5% - silicon-29 (29Si) and 3% - silicon-30 (30Si).No one purifies silicon to make chips, although early studies showed that the silicon-28 isotope has the best thermal conductivity of all silicon isotopes, and impurities 29Si and 30Si impurities interrupt heat fluxes.It was believed that the gain barely exceeds 10% with significantly increasing costs of purification.Scientists from the Lawrence Berkeley National Laboratory.Lawrence Berkeley set up an experiment in which they tried to assess the degree of influence of silicon purification on the heat sink.They connected two thermocouples with nanowires 90 nm wide and measured the heat transfer.It turned out that pure silicon-28 improves heat transfer from the heating element to the other by 150%, not 10%, as previously thought.On closer examination it turned out that the surface of the nanowire was covered with silicon dioxide, which prevented parasitic heat dissipation across the surface of the wire, and the heat flow was concentrated in its center.Scientists do not give any recipes for the organization of the heat sink from the chips in a new way.But they showed the possibility of multiplying the efficiency of heat removal from the crystals, which will be worth the candle - the cost of producing isotope-pure silicon for future chips.
Anodes with high silicon content will allow Mercedes-Benz to put an electric Gelandewagen on the assembly line by 2025
Last fall, Mercedes-Benz showed at the IAA Mobility exhibition a concept EQC, which is destined to become a precursor of the electric version of the legendary \"Gelandwagen\" - a heavy four-wheel drive vehicle, which is inferior in its overall dimensions to American competitors.It is on this model should debut a new type of battery with a high content of silicon in the anode, which will provide the SUV sufficient range.Image source: Mercedes-BenzAs explained in a press release on the website of the German automaker, by 2025 should bring its benefits after years of cooperation with the young California company Sila Nanotechnologies, which was founded in 2011 and eight years later began receiving funding from Mercedes-Benz.The company's developments are aimed at creating anodes for lithium batteries, which due to their high silicon content allow increasing the energy storage density by 20-40% up to 800W‧h per liter of traction battery volume.It is in the electric version of the G-Class that such batteries will debut, which will be produced using anodes produced by Sila.The latter will set up production of the necessary components at its facility in Washington state, for the construction of which several hundred million dollars have been allocated.This site will initially use 100 percent energy from renewable sources and will start operating in 2024.Although Mercedes-Benz will be Sila's first commercial customer, it is unlikely to be the only one, since the startup is also working with rival BMW.Sila was founded by a former Tesla specialist and managed to raise about $590 million in investments last year, and the startup's current capitalization is estimated at $3.3 billion.
AMD will unveil Radeon RX 7000 graphics cards on the latest RDNA 3 architecture graphics processors tonight. The start of the presentation,...