New material turns heat into electricity

27Sep - by bi - 0 - In Science

A new thermoelectric material called biphase nanoceramics capable of turning heat into electricity have been developed by scientists at the Far Eastern Federal University (FEFU).

The biphase nanoceramics are based on strontium titanate SrTiO3 and titanium oxide TiO2. Scientists say that their new material can transform exhaust heat (heat losses amounting to about 60% of heat exchange) into electrical energy and to protect devices operating at temperatures above 1,000°C from overheating.

The new material has high mechanical performance, thermal, and chemical resistance. The team is currently testing its thermoelectric properties.

Increased density and mechanical performance of the material along with the nanosize of its grains and high concentration of intergranular boundaries are important properties for extreme temperature conditions. In the new material they were obtained by means of high-speed consolidation of SrCO3 and anatase TiO2 nanopowders under pressure. This process is called reactive spark plasma sintering.

The team of young researchers from FEFU won a grant of the Russian Foundation for Basic Research for the development of new materials for laser technologies based on ‘optical ceramics – thermoelectrics’ heterostructures in 2018. The concept of the new thermoelectric ceramics is a result of grant work.