Development of liquid-phase growth process for Bi_2Te_3-based Thermoelectric Materials

Bi_2Te_3基热电材料液相生长工艺开发

• 批准号: 20760494
• 负责人: KITAGAWA Hiroyuki
• 金额: $ 2.25万
• 依托单位: Shimane University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20760494/
• 关键词: 熱電変換材料; 液相成長法; キャリア輸送特性; ビスマステルライド; 結晶成長

A liquid-phase growth process of Bi_2Te_3-based materials was developed in order to obtain polycrystals with a preferred orientation for use in thermoelectric applications. The liquid-phase growth was carried out under an argon atmosphere by using the sliding-boat method, which is an easy and short-time process compared with the conventional method for preparing the single crystals. X-ray diffraction patterns show that the hexagonal c-plane of the grown crystal is almost parallel to the substrate. The Hall mobility of the grown crystal (p-type Bi_<0.5>Sb_<1.5>Te_3) was 1.8～2 times larger than that of the sintered materials with a comparable carrier concentration. As a result, the thermoelectric power factor was improved by this process because of the low electrical resistivity due to the high carrier mobility.

为了获得具有择优取向的Bi_2Te_3基热电材料多晶，发展了一种液相生长工艺。液相生长在氩气气氛下通过使用滑动舟方法进行，与制备单晶的常规方法相比，该方法是简单且短时间的过程。X射线衍射分析表明，晶体的六方c面几乎平行于衬底。在相同的载流子浓度下，生长出的p型Bi_<0.5>Sb_<1.5>Te_3晶体的霍耳迁移率比烧结材料的霍耳迁移率大1.8~2倍。结果，由于高载流子迁移率导致的低电阻率，通过该工艺提高了热电功率因数。

项目成果

スライドボート法によるBi_2Te_3系熱電材料の液相成長

滑船法液相生长Bi_2Te_3基热电材料

• 发表时间: 2009
• 作者: 北川裕之;谷口大祐;國貞俊光;山田容士;久保衆伍;北川裕之
• 通讯作者: 北川裕之

Structure and carrier transport properties of hot‐press deformed Bi0.5Sb1.5Te3

热压变形Bi0.5Sb1.5Te3的结构和载流子传输性能

• DOI: 10.1002/pssa.200925133
• 发表时间: 2010
• 作者: H. Kitagawa;A. Kurata;H. Araki;S. Morito;E. Tanabe
• 通讯作者: E. Tanabe

スライドボート法によるBi2Te3系熱電材料の液相成長

滑船法液相生长Bi2Te3基热电材料

• 发表时间: 2009
• 作者: 北川裕之;谷口大祐;國貞俊光;山田容士;久保衆伍
• 通讯作者: 久保衆伍

Texture and thermoelectric properties of Bi0. 5Sb1. 5Te3 prepared by hot-press deformation

Bi0 的织构和热电性能。

• 发表时间: 2009
• 作者: Hiroyuki Kitagawa;Akira Kurata;Hiroshi Araki;Shigekazu Morito;Eishi Tanabe
• 通讯作者: Eishi Tanabe

Texture and thermoelectric properties of Bi_<0.5>Sb_<1.5>Te_3 prepared by hot-press deformation

热压变形制备Bi_<0.5>Sb_<1.5>Te_3的织构及热电性能

• 发表时间: 2009
• 作者: Hiroyuki Kitagawa;Akira Kurata;Hiroshi Araki;Shigekazu Morito;Eishi Tanabe
• 通讯作者: Eishi Tanabe