Nanowerk  April 29, 2023 An international team of researchers (Germany, USA – Northwestern University) studied an alloy of niobium, iron and antimony that converts waste heat into electricity at temperatures ranging from about 70 to more than 700 degrees Celsius with an efficiency of eight percent. To further increase the efficiency of the thermoelectric made of niobium, iron and antimony, the researchers focused on its microstructure. As grain boundaries reduce both the thermal and electrical conductivity of the material, for the highest possible efficiency, the thermal conductivity should be as low as possible so that the heat in the material […]