| 机械合金化制备β-FeSi2热电材料 |
| |
| 引用本文： | 王晓晖,孙丽美.机械合金化制备β-FeSi2热电材料[J].内蒙古大学学报(自然科学版),2012,43(2):172-176. |
| |
| 作者姓名： | 王晓晖 孙丽美 |
| |
| 作者单位： | 内蒙古民族大学化学化工学院,内蒙古通辽,028043 |
| |
| 基金项目： | 国家自然科学基金资助项目(201003070) |
| |
| 摘 要： | 采用机械合金化结合氩气退火法成功制备了β-FeSi2热电材料,并用XRD、SEM对不同球磨时间后的Fe-Si粉体进行结构及形貌表征.试验结果表明:随着球磨时间的延长,颗粒不断细化,最后可得到Fe- Si纳米晶合金；球磨20 h后,Fe衍射峰宽化而Si衍射峰逐渐减弱,形成α-Fe(Si)过饱和固溶体；球磨120 h后出现合金ε-FeSi、β-FeSi2相；调整Si/Fe原子比例为2.3,对球磨120h后合金粉末在800℃退火20h,可以得到单相β-FeSi2热电材料.
|
| 关 键 词： | 机械合金化 β-FeSi2 热电材料 |
Thermoelectric Materials of β-FeSi2 Prepared by Mechanical Alloying |
| |
| WANG Xiao-hui
,
SUN Li-mei.Thermoelectric Materials of β-FeSi2 Prepared by Mechanical Alloying[J].Acta Scientiarum Naturalium Universitatis Neimongol,2012,43(2):172-176. |
| |
| Authors: | WANG Xiao-hui SUN Li-mei |
| |
| Institution: | (College of Chemistry and Chemical Engineering,Inner Mongolia University for Nationalities,Tongliao 028043,China) |
| |
| Abstract: | Thermoelectric materials of β-FeSi2 were prepared by mechanical alloying and annealing in argon atmosphere successfully,the structure and morphology of Fe-Si powder were characterized by XRD,SEM after different milling times.The results showed that nanocrystalline Fe-Si alloy could be prepared after a long enough milling time with particle refined continuously.After 20 h milling,Fe diffraction peak was broadened and Si diffraction peaks gradually weakened in XRD and the α-Fe(Si) supersaturated solid solution was formed.After 120 h milling and 800℃,20 h annealing,ε-FeSi and β-FeSi2 appeared,adjusting the Si/Fe atomic ratio to 2.3,thermoelectric materials β-FeSi2 could be completely generated. |
| |
| Keywords: | mechanical alloying β-FeSi2 thermoelectric material |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
