METHOD OF OBTAINING THERMOELECTRICAL MATERIAL FOR THERMOELECTRICAL GENERATOR DEVICES Russian patent published in 2014 - IPC H01L35/16 

FIELD: chemistry.

SUBSTANCE: method includes synthesis of material of specified composition by fusion of initial charge components. Tellurium and lead are used in form of 5-7 mm pieces, and bismuth, selenium and antimony - in form of 3-5 mm granules. In obtaining n-type material chlorine alloying additive is introduced in form of bismuth chloride, which when charged into vial is placed between two equal in weigh layers of mixture of the remaining charge components. Process is realised in vacuumised vial with melt homogenisation. Before vacuumising, ampoule with charge is heated to temperature 100-120°C. Melting is carried out at temperature 710-730°C for 1.3-1.5 hours. Obtained alloy is crushed until powder with size of particles 500-30 mcm is obtained and briquetted. After that extrusion is carried out with heating and pressure 5-7 t/cm² and support of rate of material outflow 0.8-1.0 cm/min. Obtained after extrusion n-type material is annealed at temperature 310-315°C for 18-26 hours. Annealing of p-type material is carried out before and after extrusion at temperature 330-345°C for 22-24 hours.

EFFECT: simplification.

6 cl