Effect of SiO2 and SiC doping on the powder-in-tube processed MgB2 tapes

被引：137

作者：

Matsumoto, A ^{[1
]}

Kumakura, H ^{[1
]}

Kitaguchi, H ^{[1
]}

Hatakeyama, H ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2003年 / 16卷 / 08期

关键词：

D O I：

10.1088/0953-2048/16/8/317

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Effect of SiO2 and SiC nano-powder doping was investigated for the powder-in-tube processed MgB2/Fe tapes. Mg or MgH2 powder was used as the Mg source of starting materials, and heat treatment was carried out at 600 C for 1 h. These heat treatment conditions of lower temperature and shorter heating time are advantageous from the aspect of practical production processes. MgH2 powder improved the connection of MgB2 grains and prevented oxidation of MgB2. SiC and SiO2 doping greatly enhanced the critical current density (J(C)) values of the tapes prepared with Mg + B powder. However, only the SiC doping was effective in enhancing JC values for MgH2 + B powder. SiC doping decreased magnetic field sensitivity of J(c), while SiO2 doping did not change the field dependence of Jc. The SiC doped tape showed transport Jc value of about 6500 A cm(-2) at 4.2 K and in the magnetic field of 12 T. The irreversibility field increased from 17 T to 23 T by the SiC doping.

引用

收藏

页码：926 / 930

页数：5

相关论文

共 16 条

[1] Superconductivity in dense MgB2 wires [J].

Canfield, PC ;

Finnemore, DK ;

Bud'ko, SL ;

Ostenson, JE ;

Lapertot, G ;

Cunningham, CE ;

Petrovic, C .

PHYSICAL REVIEW LETTERS, 2001, 86 (11) :2423-2426

[2] Enhancement of the critical current density and flux pinning of MgB2 superconductor by nanoparticle SIC doping [J].

Dou, SX ;

Soltanian, S ;

Horvat, J ;

Wang, XL ;

Zhou, SH ;

Ionescu, M ;

Liu, HK ;

Munroe, P ;

Tomsic, M .

APPLIED PHYSICS LETTERS, 2002, 81 (18) :3419-3421

[3] Enhancement of critical current densities of powder-in-tube processed MgB2 tapes by using MgH2 as a precursor powder [J].

Fujii, H ;

Togano, K ;

Kumakura, H .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2002, 15 (11) :1571-1576

[4] Superconductivity of powder-in-tube MgB2 wires [J].

Glowacki, BA ;

Majoros, M ;

Vickers, M ;

Evetts, JE ;

Shi, Y ;

McDougall, I .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2001, 14 (04) :193-199

[5] Large transport critical currents in unsintered MgB2 superconducting tapes [J].

Grasso, G ;

Malagoli, A ;

Ferdeghini, C ;

Roncallo, S ;

Braccini, V ;

Siri, AS ;

Cimberle, MR .

APPLIED PHYSICS LETTERS, 2001, 79 (02) :230-232

[6] High critical currents in iron-clad superconducting MgB2 wires [J].

Jin, S ;

Mavoori, H ;

Bower, C ;

van Dover, RB .

NATURE, 2001, 411 (6837) :563-565

[7] High intergranular critical currents in metallic MgB2 superconductor [J].

Kambara, M ;

Babu, NH ;

Sadki, ES ;

Cooper, JR ;

Minami, H ;

Cardwell, DA ;

Campbell, AM ;

Inoue, IH .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2001, 14 (04) :L5-L7

[8] Critical current densities and irreversibility fields of MgB2 bulks [J].

Kumakura, H ;

Takano, Y ;

Fujii, H ;

Togano, K ;

Kito, H ;

Ihara, H .

PHYSICA C, 2001, 363 (03) :179-183

[9] High transport critical current density obtained for powder-in-tube-processed MgB2 tapes and wires using stainless steel and Cu-Ni tubes [J].

Kumakura, H ;

Matsumoto, A ;

Fujii, H ;

Togano, K .

APPLIED PHYSICS LETTERS, 2001, 79 (15) :2435-2437

[10] Strongly linked current flow in polycrystalline forms of the superconductor MgB2 [J].

Larbalestier, DC ;

Cooley, LD ;

Rikel, MO ;

Polyanskii, AA ;

Jiang, J ;

Patnaik, S ;

Cai, XY ;

Feldmann, DM ;

Gurevich, A ;

Squitieri, AA ;

Naus, MT ;

Eom, CB ;

Hellstrom, EE ;

Cava, RJ ;

Regan, KA ;

Rogado, N ;

Hayward, MA ;

He, T ;

Slusky, JS ;

Khalifah, P ;

Inumaru, K ;

Haas, M .

NATURE, 2001, 410 (6825) :186-189