高级检索
无机材料学报

无机材料学报 >

2006 , Vol. 21 >Issue 3: 640 - 644

DOI: https://doi.org/10.3724/SP.J.1077.2006.00640

研究论文

多晶CaB6陶瓷弱铁磁性能与气孔率关系

  • 曹明贺 ,
  • 孙越魁 ,
  • 蒋军 ,
  • 刘韩星 ,
  • 袁俊
展开
  • 1. 武汉理工大学材料复合新技术国家实验室, 武汉 430070;
    2. 清华大学材料科学与工程系, 北京 100084

收稿日期: 2005-04-19

  修回日期: 2005-09-29

  网络出版日期: 2006-05-20

收起

Relationship of Ferromagnetic Property with Porosity of Polycrystalline CaB6 Ceramics

  • CAO Ming-He ,
  • SUN Yue-Kui ,
  • JIANG Jun ,
  • LIU Han-Xing ,
  • YUAN Jun
Expand
  • 1. State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;
    2. Department of Materials Science and Engineering of Tsinghua University, Beijing 100084, China

Received date: 2005-04-19

  Revised date: 2005-09-29

  Online published: 2006-05-20

Fold

摘要

用常压烧结和热压烧结法分别制备了多晶Ca1+xB6(x=-0.02、0、0.02)陶瓷样品并对其铁磁性能进行系统分析. 结果表明, 在烧结温度低于1500℃范围内, 不论样品富Ca或赤Ca, 所有的样品均呈现铁磁性能; 另外, 两种方法制备的陶瓷样品虽然气孔率明显不同, 而其铁磁性能并没有显著差异, 认为CaB6样品存在的铁磁性机制不决定于样品中的Ca空位浓度和气孔率.

关键词： 多晶CaB6陶瓷; 铁磁性能; 气孔率; 热压烧结

本文引用格式

曹明贺 , 孙越魁 , 蒋军 , 刘韩星 , 袁俊 . 多晶CaB6陶瓷弱铁磁性能与气孔率关系[J]. 无机材料学报, 2006 , 21(3) : 640 -644 . DOI: 10.3724/SP.J.1077.2006.00640

Abstract

Polycrystalline Ca1+xB6(x=-0.02, 0, 0.02) ceramics were prepared by hot press and normal methods respectively and their ferromagnetic properties were analyzed systematically. The results indicate that all the samples prepared are ferromagnetic when sintering temperature is less than 1500℃. Though the porosity ratio of these samples prepared by these two methods is significant difference, the ferromagnetic properties are not changed with the changing porosity. We believe the ferromagnetism in the CaB6 ceramics is not concerned with the Ca vacancies or the porosity in the samples.

Key words： CaB6 ceramics; ferromagnetic; porosity; hot press sinter

参考文献

1 Young D P, Hall D, Torelli M E, et al. Nature, 1999, 397(4): 412-414.
2 Souma S, Komatsu H, Takahashi T, et al. Physical Review Letters, 2003 90 (2): 027202.
3 Murakami S, Shindou R, Nagaosa N, Mishchenko A S. Physical Review B, 2002, 66 (18): 184405.
4 Ceperley D. Nature, 1999, 397(4): 386-387.
5 Zhitomirsky M E, Rice T M, Anisimov V I. Nature, 1999, 402(18): 251-252.
6 Lofland S E, Seaman B, Ramanujachary K V, et al. Physical Review B, 2003, 67 (2): 020410.
7 Gianno K, Sologubenko A V, Ott H R, et al. Journal of Physics-Condensed Matter, 2002 14 (5): 1035-1043.
8 Moriwaka T, Nishioka T, Sato N K. Journal of the Physical Society of Japan, 2001, 70(2): 341-343.
9 Monnier R, Delley B. Physical Review Letters, 2002, 87(15): 157204.
10 Vonlanthen P, Felder E, Degiorgi L, et al. Physical Review B, 2001, 62(15): 10076.
Options
文章导航

/

〈 〉