X-ray Powder Diffraction Study on the MgB2 Superconductor Reacted With nano-SiC: The Effects of Sintering Temperature

被引：0

作者：

Yong, Tan Kwee ^{[1
]}

Lee, Tan Kim ^{[1
]}

Pah, Lim Kean ^{[1
]}

Shaari, Abdul Halim ^{[1
]}

Ban, Tan Kar ^{[2
]}

Kien, Chen Soo ^{[1
]}

机构：

[1] Univ Putra Malaysia, Fac Sci, Dept Phys, Upm Serdang 43400, Malaysia

[2] Univ Putra Malaysia, Fac Sci, Dept Chem, Upm Serdang 43400, Malaysia

来源：

X-RAY AND RELATED TECHNIQUES | 2011年 / 173卷

关键词：

MgB2; sintering temperature; SiC; XRD; MICROSTRUCTURE; TAPES; WIRES; ENHANCEMENT; BULKS; PHASE; J(C);

D O I：

10.4028/www.scientific.net/AMR.173.78

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

SiC added MgB2 polycrystalline samples were synthesized at low (650 degrees C) and high (850 degrees C) temperatures in order to study the sintering effect on the phase formation and superconducting properties. The MgB2 bulks with additions of 0wt%, 1wt%, 3wt% and 5wt% SiC were studied with powder X-ray diffraction technique. We observed that MgB2 remained as the primary phase for both sintering temperatures in all samples with the presence of MgO and Mg2Si as the main impurities. Some diffraction peaks associated with unreacted SiC is also noticeable. The relative intensity of the Mg2Si peaks was found to decrease in samples sintered at higher temperature. Temperature dependent magnetic moment measurements showed that the superconducting transition temperature, T-c decreases as the SiC addition level increases while lower sintering temperature degrades T-c to a greater extent. The changes in the physical properties is discussed based on the results of phase formation, full width half maximum (FWHM), lattice parameter and crystallite size.

引用

页码：78 / +

页数：3

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