粉末冶金技术2025，Vol.43Issue(1)：79-85,7.DOI:10.19591/j.cnki.cn11-1974/tf.2023020009
高择优取向P型Bi2Te3基材料制备及性能
Preparation and properties of P-type Bi2Te3-based materials with high preferred orientation
苏紫珊 1蔡新志 2熊平尚 1童培云 2朱刘2
作者信息
- 1. 先导薄膜材料(广东)有限公司,清远 511517
- 2. 先导薄膜材料(广东)有限公司,清远 511517||广东先导稀材股份有限公司国家稀散金属工程技术研究中心,清远 511517
- 折叠
摘要
Abstract
Using the Bi0.4Sb1.6Te3+3%Te(mass fraction)melting crystal rods as the raw materials,the alloy ingots with good orientation were prepared by water-cooled copper crucible maglev melting technology.The P-type Bi2Te3-based alloy powders were obtained by grinding and sieving the alloy ingots with hammer.The P-type Bi2Te3-based thermoelectric materials with the preferred orientation along the(00l)crystal face were prepared by vacuum hot pressing sintering technology.The micro-morphology and preferred orientation of the ingots,alloy powders and hot pressed sintered blocks were studied,as well as the effect of particle size on the electrical properties of the sintered blocks.The results show that the powders after quenching,crushing,and screening are highly oriented along the(00l)crystal face.The blocks prepared by using 100～200 mesh size powders sintered at 500℃and 40 MPa have the power factor of 44.5 μW·cm-1·K-2,which can cut the thin slices with the thickness of 0.3 mm,with the pass rate of more than 90%.Matching the conventional 127 pair 4 cm×4 cm thermoelectric cooler(TEC)with the zone melting N-type,the maximum temperature difference of the model TEC1-12706 devices can reach 70℃,providing the preparation direction of the high-performance Bi2Te3-based thermoelectric materials.关键词
Bi2Te3/择优取向/磁悬浮熔炼/水冷铜/热电材料Key words
Bi2Te3/preferred orientation/magnetic levitation melting/water-cooled copper/thermoelectric material分类
矿业与冶金引用本文复制引用
苏紫珊,蔡新志,熊平尚,童培云,朱刘..高择优取向P型Bi2Te3基材料制备及性能[J].粉末冶金技术,2025,43(1):79-85,7.
