A method for preparing thermoelectric thick film

Abstract

The invention relates to a thermoelectric thick film preparation method. Thermoelectric thick film slurry is composed of thermoelectric material particles, polymers and an organic solvent. Due to the polymer ratio, the thermoelectric thick film slurry printed on a flexible substrate does not fall automatically after being dried, after the thermoelectric thick film slurry is fully dried, one face with viscose of a high temperature-resisting thin film is used for tight covering, and a thermoelectric thick film with excellent performance is acquired through cold isostatic pressing processing. As the polymer ratio is the lowest ratio which can only enable the thermoelectric thick film slurry printed on the flexible substrate not to fall automatically after being dried, attachment and molding of the thermoelectric thick film on the flexible substrate are acquired through the tightly-covered high temperature-resisting thin film and cold isostatic pressing processing, the thermoelectric particles are fully and tightly contacted, conductivity s close to that of a bulk can be acquired, the thermoelectric performance is improved, and due to protection of the high temperature-resisting thin film, the thermoelectric thick film is not likely to oxidize even if working for a long time at a temperature between room temperature and 230 DEG C.

Description

technical field [0001] The invention relates to the technical field of material preparation, and more specifically, to a method for preparing a thermoelectric thick film. Background technique [0002] The temperature difference is an important parameter to determine the efficiency of thermoelectric power generation. The length of traditional block thermoelectric arms is limited, and it is not easy to establish a large temperature difference. Therefore, the production of long film-shaped thermoelectric arms is a feasible method to improve the efficiency of thermoelectric power generation. The preparation method of the conductor thick film is flexible in design, small in investment, low in cost, and reliable in performance. [0003] A good thermoelectric material must have a high thermoelectric coefficient S and electrical conductivity s, so as to ensure a more obvious thermoelectric effect, and at the same time make the generated Joule heat small. [0004] The attachment and...

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Problems solved by technology

[0004] The attachment and molding of the thermoelectric thick film on the substrate requires the use of a polymer binder. The existence of the polymer matrix has little effect on the thermoelectric coefficient S, but it reduces the mutual contact between the thermoelectric thick film particles, and the through-current conduction decreases. The conductivity s of the thermoelectric thick film is reduced by 2 to 3 orders of magnitude, and the thermoelectric performance is significantly reduced

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