Manganese Telluride Powder

Manganese Telluride Powder

MnTe powder is a lead-free chalcogenide compound that has quite good thermoelectric properties at medium temperatures due to its high Seebeck coefficient and relatively low thermal conductivity. MnTe powder has NiAs type hexagonal structure with space group of p63/mmc, whose high symmetry helps to achieve high Seebeck coefficient and fairly good electrical conductivity. Previous investigations on MMnTe powder have mainly focused on optical, electrical and magnetic properties and have also been subjected to neutron diffraction studies. Pristine MnTe is a p-type material with a relative integer concentration of 1019 to 1020 and low electrical conductivity. This band gap is considered ideal for medium temperature applications. Recent studies on MnTe powder have shown that the doping/replacement of silver, copper, sulfur and sodium sulfide improves electrical conductivity resulting in an increase in power factor and ZT. These samples were prepared by plasma spark sintering. Many scientists have found that replacing MnTe with Na, Cu and S increase power factor and ZT. Compared with other conventional n-type thermoelectric materials, MnTe is deficient in materials other than ZT.