24小时热门版块排行榜    

Znn3bq.jpeg
查看: 1889  |  回复: 9
当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖

G龙行天下

新虫 (小有名气)

[求助] 关于 复合对 热电材料性能影响的问题 已有2人参与

各位做热电材料的虫友,请教一个问题:有没有做过复合对热电性能的影响研究的,我现在在做Ca3Co4O9/Bi2Ca2Co2Oy 复合材料,但是不是很清楚其机理,麻烦知道的指教一下哇,感谢
回复此楼
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

1529701999

木虫 (正式写手)

请问你的烧结制度是怎么确定的呢?
不忘初心,方得始终
5楼2015-10-22 21:37:23
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
查看全部 10 个回答

穿越千年

版主 (著名写手)

寂寞读书的小和尚

优秀版主优秀版主优秀版主优秀版主

【答案】应助回帖

感谢参与,应助指数 +1
其实这也就是一种掺杂。我给你提供一篇参考文献,GeTe掺Bi2Te3,希望有帮助:
Wu, D., et al. (2014). "Origin of the High Performance in GeTe-Based Thermoelectric Materials upon Bi2Te3 Doping." J Am Chem Soc 136(32): 11412-11419.
        As a lead-free material, GeTe has drawn growing attention in thermoelectrics, and a figure of merit (ZT) close to unity was previously obtained via traditional doping/alloying, largely through hole carrier concentration tuning. In this report, we show that a remarkably high ZT of approximately 1.9 can be achieved at 773 K in Ge0.87Pb0.13Te upon the introduction of 3 mol % Bi2Te3. Bismuth telluride promotes the solubility of PbTe in the GeTe matrix, thus leading to a significantly reduced thermal conductivity. At the same time, it enhances the thermopower by activating a much higher fraction of charge transport from the highly degenerate Sigma valence band, as evidenced by density functional theory calculations. These mechanisms are incorporated and discussed in a three-band (L + Sigma + C) model and are found to explain the experimental results well. Analysis of the detailed microstructure (including rhombohedral twin structures) in Ge0.87Pb0.13Te + 3 mol % Bi2Te3 was carried out using transmission electron microscopy and crystallographic group theory. The complex microstructure explains the reduced lattice thermal conductivity and electrical conductivity as well.
热电材料,相变材料,阻变材料,APT,EBSD
2楼2015-10-08 16:29:32
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

穿越千年

版主 (著名写手)

寂寞读书的小和尚

优秀版主优秀版主优秀版主优秀版主

我再给你提供一张图片,描述复合材料的:

关于 复合对 热电材料性能影响的问题

更多的参考文献:
[92] J.O. Sofo, G.D. Mahan, Appl. Phys. Lett. 65 (1994) 2690.
[93] D.A. Broido, T.L. Reinecke, Phys. Rev. B 51 (1995) 13797.
[94] T.C. Harman, D.L. Spears, M.J. Manfra, J. Electron. Mater. 25 (1996) 1121.
[95] L.D. Hicks, T.C. Harman, X. Sun, M.S. Dresselhaus, Phys. Rev. B 53 (1999) R10493.
[96] T.C. Harman, P.J. Taylor, D.L. Spears, M.P. Walsh, J. Electron. Mater. 29 (2000) L1.
[97] T.C. Harman, P.J. Taylor, M.P. Walsh, B.E. LaForge, Science 279 (2002) 2229.
热电材料,相变材料,阻变材料,APT,EBSD
3楼2015-10-09 16:41:04
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

G龙行天下

新虫 (小有名气)

引用回帖:
2楼: Originally posted by 穿越千年 at 2015-10-08 16:29:32
其实这也就是一种掺杂。我给你提供一篇参考文献,GeTe掺Bi2Te3,希望有帮助:
Wu, D., et al. (2014). "Origin of the High Performance in GeTe-Based Thermoelectric Materials upon Bi2Te3 Doping."  ...

谢谢哈
4楼2015-10-22 17:02:40
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[基金申请] 国自然面上和省基金B类撒花 +15 花田半亩~白 2026-04-21 15/750 2026-04-23 00:09 by prepg
[考博] 华师大读博 +3 xq83 2026-04-22 5/250 2026-04-22 10:42 by xq83
[教师之家] 又一批高校组建人工智能学院 师资行吗 不是骗人吗 +5 yexuqing 2026-04-19 5/250 2026-04-22 10:01 by easeheart
[论文投稿] 急需审稿人!!! +3 陆小果画大饼 2026-04-21 3/150 2026-04-21 23:54 by jzy_123456
[考博] 申博/考博 +4 啃面包的小书虫 2026-04-17 8/400 2026-04-21 16:26 by 啃面包的小书虫
[考研] 295分求调剂 +6 ?要上岸? 2026-04-17 6/300 2026-04-21 08:18 by Equinoxhua
[考研] 085600材料与化工调剂 5+3 孜孜不倦2002 2026-04-19 6/300 2026-04-20 21:25 by babero
[论文投稿] 有没有接收比较快的sci期刊呀,最好在一个月之内的,研三孩子求毕业 20+4 之护着 2026-04-16 7/350 2026-04-20 15:45 by 豆豆7758
[考研] 337求调剂 +3 jyz04 2026-04-18 3/150 2026-04-20 12:24 by 研可安
[考博] 申博 +3 Xyyx. 2026-04-18 3/150 2026-04-20 10:44 by YuY66
[考博] 湖南大学刘巧玲课题组2026年第二批次博士研究生招生信息 +3 南风观火 2026-04-18 5/250 2026-04-20 10:13 by 南风观火
[考研] 求计算机方向调剂 +3 Toffee2 2026-04-16 6/300 2026-04-19 22:37 by ll叶
[考研] 294求调剂 +8 淡然654321 2026-04-17 9/450 2026-04-19 19:51 by Equinoxhua
[考研] 304求调剂 +8 castLight 2026-04-16 8/400 2026-04-19 17:14 by 中豫男
[考研] 求调剂 +10 小聂爱学习 2026-04-16 12/600 2026-04-19 16:51 by 中豫男
[考研] 求调剂 +6 苦命人。。。 2026-04-18 7/350 2026-04-19 16:27 by 中豫男
[考研] 收到复试调剂但是去不了 +8 小蜗牛* 2026-04-16 8/400 2026-04-18 11:15 by zixin2025
[考研] 260求调剂 +4 Zyt1314520.. 2026-04-17 5/250 2026-04-18 08:28 by babysonlkd
[有机交流] 二苯甲酮酸类衍生物 50+3 小白爱主人 2026-04-17 6/300 2026-04-17 18:47 by kf2781974
[考研] 322求调剂 +6 tekuzu 2026-04-17 6/300 2026-04-17 13:48 by Espannnnnol
信息提示
请填处理意见