Preparation method of novel medium-temperature thermoelectric material

• Main Authors: KONG FANYU, HOU XUFENG, REN BAOGUO
• Format: Patent
• Language: Chinese; English
• Published: 02.02.2021
• Subjects: ALLOYS; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention provides a preparation method of a novel medium-temperature thermoelectric material. The method comprises the following steps: S1, crushing raw materials into small blocks with a diameter of not more than 30mm, and putting the small blocks on filter paper; S2, weighing the small blocks according to a certain stoichiometric ratio, adding the small blocks into a crucible and then starting to smelting so as to acquire a cast ingot; S3, grinding the cast ingot, and screening a powder obtained after grinding through a mesh screen; S4, putting the sieved powder into a mold to be subjected to hot pressed sintering, and acquiring a sintered material; and S5, putting the sintered material into an annealing furnace for annealing treatment to obtain the novel medium-temperature thermoelectric material. The preparation method has the beneficial effects that problems that a TAGS system material is also volatilized seriously in a working temperature range, electric heating performanceand mechanical performanc