P-type bismuth telluride-based alloy material and preparation method thereof

A bismuth telluride-based alloy technology, applied in thermoelectric device node lead-out materials, thermoelectric device manufacturing/processing, etc., can solve the problems of difficult processing, weak processing strength, low yield, etc., to improve mechanical properties , high orientation, and the effect of improving thermoelectric properties and mechanical properties

Active Publication Date: 2021-07-23
XIANDAO THIN FILM MATERIALS GUANGDONG CO LTD
View PDF11 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the intrinsic layered structure of bismuth telluride-based materials, it is very easy to cleavage along the c-axis crystal plan

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • P-type bismuth telluride-based alloy material and preparation method thereof
  • P-type bismuth telluride-based alloy material and preparation method thereof
  • P-type bismuth telluride-based alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] An embodiment of a p-type bismuth telluride-based alloy material and a preparation method thereof of the present invention is as follows:

[0042] (1) With p-type Bi 0.5 Sb 1.5 Te 3 The stoichiometric ratio of the raw materials is 1.2Kg in total of Bi, Sb, and Te block materials, which are added to the high borosilicate glass tube in the order of Sb, Bi, and Te, and then vacuum-sealed;

[0043] (2) Put the high borosilicate glass tube into the swing furnace and preheat it at 700°C for 5 minutes, then swing and smelt it for 5 minutes, then take out the high borosilicate glass tube and shake it well, then put it back into the swing furnace for refining for 2 minutes, then take it out The high borosilicate glass tube leans vertically on the iron frame, tap the glass tube to make the melt on the wall of the glass tube slide down, the bubbles in the melt rise up, exhaust the bubbles, and cool down to room temperature naturally;

[0044] (3) Fix the glass tube cooled in st...

Embodiment 2

[0048] An embodiment of a p-type bismuth telluride-based alloy material and a preparation method thereof of the present invention is as follows:

[0049] (1) With p-type Bi 0.5 Sb 1.5 Te 3 The stoichiometric ratio of the raw materials is 1.2Kg in total of Bi, Sb, and Te block materials, which are added to the high borosilicate glass tube in the order of Sb, Bi, and Te, and then vacuum-sealed;

[0050] (2) Put the high borosilicate glass tube into the swing furnace and preheat it at 700°C for 3 minutes, then swing and smelt it for 5 minutes, then take out the high borosilicate glass tube and shake it well, then put it back into the swing furnace for refining for 3 minutes, then take it out The high borosilicate glass tube leans vertically on the iron frame, tap the glass tube to make the melt on the wall of the glass tube slide down, the bubbles in the melt rise up, exhaust the bubbles, and cool down to room temperature naturally;

[0051] (3) Fix the glass tube cooled in st...

Embodiment 3

[0055] An embodiment of a p-type bismuth telluride-based alloy material and a preparation method thereof of the present invention is as follows:

[0056] (1) With p-type Bi 0.5 Sb 1.5 Te 3 The stoichiometric ratio of the raw materials is 1.5Kg of the raw materials Bi, Sb, and Te block materials, and they are added to the high borosilicate glass tube in the order of Sb, Bi, and Te, and the tube is vacuum sealed;

[0057] (2) Put the high borosilicate glass tube into the swing furnace and preheat it at 700°C for 5 minutes, then swing and smelt it for 7 minutes, then take out the high borosilicate glass tube and shake it well, then put it back into the swing furnace for refining for 3 minutes, then take it out The high borosilicate glass tube leans vertically on the iron frame, tap the glass tube to make the melt on the wall of the glass tube slide down, the bubbles in the melt rise up, exhaust the bubbles, and cool down to room temperature naturally;

[0058] (3) Fix the glas...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a p-type bismuth telluride-based alloy material and a preparation method thereof, and belongs to the technical field of thermoelectric materials. The preparation method of the preferentially oriented p-type bismuth telluride-based alloy material comprises the following steps: (1) carrying out zone melting on a p-type bismuth telluride-based alloy precursor to obtain a p-type bismuth telluride-based alloy crystal bar; and (2) putting the p-type bismuth telluride-based alloy crystal bar obtained in the step (1) into a hammer mill screening machine to be hammered and screened, and obtaining the p-type bismuth telluride-based alloy material. The preparation method combining zone melting and hammering screening is adopted, the prepared p-type bismuth telluride-based alloy material has high orientation in the (00l) crystal face direction, and a high-orientation raw material can be provided for research and improvement of the p-type bismuth telluride-based thermoelectric material by applying a powder metallurgy process for experimental development; and the thermoelectric performance and the mechanical performance of the material are easy to improve.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric materials, and in particular relates to a p-type bismuth telluride-based alloy material and a preparation method thereof. Background technique [0002] Thermoelectric materials can realize the direct conversion of heat energy and electric energy. They are a new type of clean renewable energy materials. They have excellent characteristics such as no pollution, no loss, and high reliability. They are expected to greatly improve energy utilization and alleviate environmental pollution. [0003] Among them, bismuth telluride-based compounds are commercially used thermoelectric materials with the best performance near room temperature. Due to the intrinsic layered structure of bismuth telluride-based materials, it is very easy to cleavage along the c-axis crystal plane, resulting in very weak processing strength of the material, resulting in a very low processing yield and high processing diffic...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01L35/34H01L35/16
CPCH10N10/852H10N10/01
Inventor 苏紫珊蔡新志朱刘童培云肖惠云
Owner XIANDAO THIN FILM MATERIALS GUANGDONG CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap