What are nanostructured thermoelectric materials?
What are nanostructured thermoelectric materials?
Nanostructured thermoelectric materials are designed to introduce nanometer-sized polycrystallines and interfaces into bulk materials, which can reduce the lattice thermal conductivity by increasing the phonon scattering.
Which one is a good thermoelectric material?
As a result, Silicon-germanium alloys are currently the best thermoelectric materials around 1000 ℃ and are therefore used in some radioisotope thermoelectric generators (RTG) (notably the MHW-RTG and GPHS-RTG) and some other high^temperature applications, such as waste heat recovery.
What causes Seebeck effect?
The Seebeck effect is a phenomenon in which a temperature difference between two dissimilar electrical conductors or semiconductors produces a voltage difference between the two substances. When heat is applied to one of the two conductors or semiconductors, heated electrons flow toward the cooler one.
What is difference between Seebeck effect and Peltier effect?
The Seebeck effect is when electricity is created between a thermocouple when the ends are subjected to a temperature difference between them. The Peltier effect occurs when a temperature difference is created between the junctions by applying a voltage difference across the terminals.
What are various thermoelectric materials?
Compounds of Mg and group-14 element Mg2BIV (B14=Si, Ge, Sn) compounds and their solid solutions are good thermoelectric materials and their ZT values are comparable with those of established materials. The appropriate production methods are based on direct co-melting, but mechanical alloying has also been used.
Is copper a thermoelectric material?
This extraordinary ‘liquid-like’ behaviour of copper ions around a crystalline sublattice of Se in Cu2−xSe results in an intrinsically very low lattice thermal conductivity which enables high zT in this otherwise simple semiconductor. This unusual combination of properties leads to an ideal thermoelectric material.
What is thermoelectric energy?
Thermoelectric power is the conversion of a temperature differential directly into electrical power. Thermoelectric power results primarily from two physical effects: the Seebeck effect, and Peltier effect. The Seebeck effect is named after Thomas J. Seebeck, who first discovered the phenomenon in 1821.
What is meant by Seebeck effect?
