EFFECTS OF SINTERING TEMPERATURE ON SUPERCONDUCTIVITY IN Ti-SHEATHED MgB2 WIRES

被引：0

作者：

Liang, G. ^{[1
]}

Fang, H. ^{[1
]}

Guchhait, S. ^{[2
]}

Hoyt, C. ^{[1
]}

Markert, J. T. ^{[2
]}

机构：

[1] Sam Houston State Univ, Dept Phys, Huntsville, TX 77341 USA

[2] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA

来源：

ADVANCES IN CRYOGENIC ENGINEERING (MATERIALS), VOL 56: TRANSACTIONS OF THE INTERNATIONAL CRYOGENIC MATERIALS CONFERENCE - ICMC | 2010年 / 1219卷

基金：

美国国家科学基金会;

关键词：

MgB2; superconductors; critical current density; magnetization; x-ray diffraction; SEM graph; CRITICAL-CURRENT DENSITY; MAGNETIC SUSCEPTIBILITY; TITANIUM; ALLOYS;

D O I：

10.1063/1.3402313

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of sintering temperature on the superconducting properties of Ti-sheathed MgB2 wires have been studied. The wires were fabricated by in situ powder-in-tube (PIT) method and characterized by x-ray diffraction, magnetization, scanning electron microscopy and transport measurements. Samples were sintered for 30 minutes at the following temperatures: 650 degrees C, 700 degrees C, 750 degrees C, 800 degrees C, and 850 degrees C It is found that the cores of these wires are almost in pure MgB2 superconducting phase, indicating that the T-1-sheath does not react with Mg or B The superconducting transition temperature 71 decreases from 36 K to 34.2 K with the decrease of the sintering temperature from 850 C to 650 degrees C. At 5 K and 20 K, critical current density J(c), peaks up for samples sintered at 800 degrees C, which is in sharp contrast with previously reported result that for Fe-sheathed MgB2 wires, J(c) peaks up at sintering temperature of 650 degrees C

引用

页码：281 / +

页数：2

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