Mn4N固相合成反钙钛矿型Mn3MN(M:Cu, Ge)的机理研究

人工晶体学报, 2010, 39(2): 504-510.

Mn4N固相合成反钙钛矿型Mn3MN(M:Cu, Ge)的机理研究

张从阳 ^1, , 朱洁 ^2, , 张茂才 ^3, , 周丽洁 ^4, , 汪洁 ^5,

1.北京科技大学新金属材料国家重点实验室,北京,100083

2.北京科技大学新金属材料国家重点实验室,北京,100083

3.北京科技大学新金属材料国家重点实验室,北京,100083

4.北京科技大学新金属材料国家重点实验室,北京,100083

5.北京科技大学新金属材料国家重点实验室,北京,100083

基金项目: 北京科技大学"422 高层次创新人才工程"资助课题(00007411)

关键词：固相反应 , 反钙钛矿结构 , 热重-差热分析

Study on Synthesis Mechanism of Antiperviskite Type Mn3MN(M:Cu,Ge)Prepared by Solid State Reaction from Mn4N

以Mn4N、Cu和Ge粉末为原料,在N2气氛下固相烧结合成了反钙钛矿结构的锰基氮化物Mn3MN(M:Cu, Ge).利用热重-差热分析(TG-DSC),X射线衍射(XRD),扫描电镜(SEM)等技术研究了合成Mn3MN(M:Cu, Ge)的固相反应机理及制备的工艺条件.固相反应的主要机理是Cu(或Ge)原子通过固溶扩散置换出Mn4N立方结构中顶点的Mn原子形成反钙钛矿结构;置换出来的Mn与多余的Cu反应形成Mn3Cu固溶相, 在N2气氛中氮化再次生成反钙钛矿Mn3CuN相.以Mn4N制备纯的反钙钛矿结构的Mn3MN需要严格控制原料的配比,且需要在高真空高纯N2保护气氛中进行烧结.

参考文献

[1]	Chi EO.;Hur NH.;Kim WS. .Nearly zero temperature coefficient of resistivity in antiperovskite compound CuNMn3[J].Solid State Communications,2001(7/8):307-310.
[2]	Kim WS.;Chi EO.;Kim JC.;Hur NH.;Lee KW.;Choi YN. .Cracks induced by magnetic ordering in the antiperovskite ZnNMn3 - art. no. 172402[J].Physical review, B. Condensed matter and materials physics,2003(17):2402-0.
[3]	Takenaka K;Takagi H .Giant Negative Expansion on Ge-doped Antiperovskite Manganese Nitrides[J].Applied Physics Letters,2005,87:261902.
[4]	Koshi Takenaka;Hidenori Takagi .Magnetovolume Effect and Negative Thermal Expansion in Mn_3(Cu_(1-x)Ge_x)N[J].Materials transactions,2006(3):471-474.
[5]	Sun Y;Wang C;Wen Y C et al.Lattice Contraction and Magnetic Electronic Transport Properties of Mn3Zn1-xGexN[J].Applied Physics Letters,2007,91:231913.
[6]	Takenaka K;Asano K;Misawa M;Takagi H .Negative thermal expansion in Ge-free antiperovskite manganese nitrides: Tin-doping effect[J].Applied physics letters,2008(1):11927-1-11927-3-0.
[7]	Huang R L;Li L F;Cai F S et al.Low-temperature Negative Thermal Expansion pf the Antiperovskite Manganese Nitride Mn3CuN Codoped with Ge and Si[J].Applied Physics Letters,2008,93:081902.
[8]	张从阳,朱洁,张茂才.Mn3（CU1-xGex）N的负热膨胀现象[J].金属学报,2009(01):97-101.
[9]	Takenaka K;Takagi H .Zero Thermal Expansion in Pure-form Antiperovskite Manganese Nitride[J].Applied Physics Letters,2009,94:131904.
[10]	Asano K;Kayama K;Takenaka K .Magnetostirction in Mn3CuN[J].Applied Physics Letters,2008,92:161909.
[11]	Lukashev P;Sabirianov R F;Belashchenko K .Theory of the Piezomagnetic Effect in Mn-bases Antiperovskites[J].Physical Review B,2008,78:184414.
[12]	Qiu C;Guillermet A F .Predicative Approach to the Entropy of Manganese Nitrides and Calculation of the Mn-N Phase Diagram[J].Zeitschrift fur Metallkunde,1993,84(01):11-22.
[13]	Barberon M;Madar R;Fruchart M E et al.T1 and T4 Quadratic Distortion in Perovskite Manganese Carbides and Nitrides[J].Materials Research Bulletin,1970,5:1-7.
[14]	Dong C .Powder X:Windows-95 Based Program for Powder X-ray Diffraction Data Processing[J].Journal of Applied Crystallography,1999,32:838.
[15]	Sun Z H;Song X Y;Yin F X et al.Giant Negative Thermal Expansion in Ultrafine-grained Mn3(Cu1-xGex)N(x = 0.5) bulk[J].Journal of Physics D:Applied Physics,2009,42:122004.

上一张下一张

计量

下载量()
访问量()

作者相关

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网