高君玲,陈秀娟,赵文军,张鹏林,余淑荣

• 1:甘肃省有色金属新材料省部共建国家重点实验室
• 2:兰州理工大学机电工程学院

摘要(Abstract)：

采用燃烧合成-热压工艺制备热电材料β-FeSi2,研究了热压温度和热压压力对铁硅间化合物相变的规律。利用X射线衍射仪和扫描电子显微镜分析了合成的铁硅间化合物的相组成及其微观结构形貌。结果表明:当铁硅原子比Fe∶Si为1∶3,添加0.50 at%的Cu时,燃烧合成的产物主要为α-Fe2Si5和Si。热压温度为760℃时α-Fe2Si5完全转变为β-FeSi2,且压力的升高有助于β-FeSi2生成和产物致密度的提高。α-Fe2Si5分解发生共析反应时,部分Si固溶于β-FeSi2内形成了β-FeSi2合金。另一部分Si微粒粘附于β-FeSi2颗粒上,Si在β相的弥散分布可提高热电优值。

关键词(KeyWords)： β-FeSi2;热压;温度;相转变;微观结构

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51161012)

作者(Author): 高君玲,陈秀娟,赵文军,张鹏林,余淑荣

DOI: 10.13289/j.issn.1009-6264.2013.01.004

参考文献(References)：

• [1]况学成,郝恩奇.热电材料及其研究现状[J].中国陶瓷工业,2008,15(5):27-30.KUANG Xue-cheng,HAO En-qi.Thermoelectric materials and their research situation[J].China Ceramic Industry,2008,15(5):27-30.
• [2]张建中.温差发电器国际动态[J].电源技术,1989(2):37-41.ZHANG Jian-zhong.Thermoelectric generator international developments[J].Chinese Journal of Power Sources,1989(2):37-41.
• [3]李伟文,赵新兵,周邦昌.β-FeSi2热电材料的研究进展[J].材料导报,2002,16(5):14-16.LI Wei-wen,ZHAO Xin-bing,ZHOU Bang-chang.Progress in research on thermoelectric materialsβ-FeSi2[J].Materials Review,2002,16(5):14-16.
• [4]Isamu Yamanchi,Takashi Okamoto,Hajime Ohata,et al.β-phase transformation and thermoelectric power in FeSi2 and Fe2 Si5 based alloyscontaining small amounts of Cu[J].J Alloys and Compounds,1997(26):162-171.
• [5]Nishida I.Study of semiconductor-to-metal transition in Mn-doped FeSi2[J].Phys Rev B,1973,7:2710-2713.
• [6]罗胜耘,曾正,路安江.一种新型环境半导体材料-β-FeSi2[J].广西轻工业,2008(5):20-21.LUOSheng-yun,ZENG Zheng,Lu An-jiang.New environmental semiconductor materials[J].Guangxi Journal of Light Industry,2008(5):20-21.
• [7]马秋花,路朋献.β-FeSi2基热电材料的研究进展[J].稀有金属快报,2006,25(7):1-5.MAQiu-hua,LU Peng-xian.Progress of studies on theβ-FeSi2 based thermoelectric materials[J].Rare Metals Letters,2006(7):1-5.
• [8]陈鑫,黄海波,李凡.热电材料β-FeSi2机械合金化和热处理相变[J].东南大学学报:自然科学版,2008,38(5):898-901.Chen Xin,Huang Hai-bo,Li Fan.Phase transformation inβ-FeSi2 thermoelectric materials during mechanical alloying and heat-treatment[J].Journalof Southeast University:Natural Science Edition,2008,38(5):898-901.
• [9]高恒蛟,陈秀娟,封小鹏,等.Cu掺杂及Si含量对β-FeSi2产率的影响[J].材料热处理学报,2011,32(5):17-21.GAO Heng-jiao,CHEN Xiu-juan,FENG Xiao-peng,et al.Effect of doped copper and silicon content on productivity ofβ-FeSi2[J].Transactions ofMaterials and Heat Treatment,2011,32(5):17-21.
• [10]朱铁军,赵新兵.β-FeSi2热电材料的性能优化及测试方法[J].材料科学与工程,1999,17(4):55-58.ZHU Tie-jun,ZHAO Xin-bing.Optimization and measurement method of properties ofβ-FeSi2 thermoelectric materials[J].Materials Science&Engineering,1999,17(4):55-58.
• [11]吕强,荣剑英,赵磊,等.热压工艺参数对n型和P型Bi2Te3基赝三元热电材料电学性能的影响[J].物理学报,2005,54(7):3321-3325.LüQiang,RONG Jian-ying,ZHAO Lei,et al.Influence of process parameters on the electrical properties of n-type and p-type Bi2Te3-based pseudo-ternary thermoelectric materials by the hot-pressing method[J].Acta Physica Sinica,2005,54(7):3321-3325.

文章评论(Comment)：