A kind of y-doped pseudo-ternary semiconductor refrigeration material and its preparation method

A semiconductor and refrigeration technology, applied in the field of semiconductor refrigeration materials and their preparation, can solve problems such as splitting, and achieve the effects of improved mechanical properties, increased size, and dense materials
CN108878634BActive Publication Date: 2021-12-07HARBIN NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HARBIN NORMAL UNIVERSITY
Publication Date
2021-12-07

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Abstract

A Y-doped pseudo-ternary semiconductor refrigeration material and a preparation method thereof, relating to a semiconductor refrigeration material and a preparation method thereof. The purpose is to solve the existing Bi 2 Te 3 The semiconductor-based cooling material is prone to splitting during the cutting process. The molecular formula of the Y-doped pseudo-ternary semiconductor refrigeration material is: (Bi 2 Te 3 ) (1‑2x) (Sb 2 Te 3 ) x (Bi 2 Se 3 ) x ‑Y, x in the molecular formula is 0.04~0.06. Preparation: Weigh yttrium powder, tellurium powder, bismuth powder, antimony powder and selenium powder as raw materials; the raw materials are mechanically alloyed, the sample is sintered in vacuum at high temperature, and finally hot-pressed. The mechanical properties of the Y-doped pseudo-ternary semiconductor refrigeration material prepared by the invention are greatly improved, and the problem of easy splitting is solved. The Y-doped concentration is 1% and the ZT value of the material at 300K when the Y-doped concentration is 1% and is hot-pressed at 200°C 0.73. The invention is suitable for preparing semiconductor refrigeration materials.
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Description

technical field

[0001] The invention relates to a semiconductor refrigeration material and a preparation method thereof. Background technique

[0002] Thermoelectric materials have entered people's field of vision due to their small size, no noise, and zero emission of toxic substances. Thermoelectric materials, also known as semiconductor refrigeration materials, can realize the direct conversion of electrical energy and thermal energy in a solid state. When there is a temperature difference in the thermoelectric material, an electromotive force is generated, and then heat energy is converted into electrical energy. On the contrary, when there is a potential difference between the two ends of the material, it will also produce heat absorption or heat release. This technology is a thermoelectric conversion technology. Through electrical connection, thermoelectric materials can be used to manufacture thermoelectric power generation devices and semiconductor refrigeration de...

Claims

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