Phase formation of REBa2Cu3O7-δ (RE: Y0.5Gd0.5, Y0.5Nd0.5, Nd0.5Gd0.5) superconductors from nanopowders synthesised via co-precipitation

被引：3
|
作者：
Wahid, M. H. [1 ]
Zainal, Z. [1 ,2 ]
Hamadneh, I. [3 ]
Tan, K. B. [1 ]
Halim, S. A. [4 ]
Rosli, A. M. [1 ,2 ]
Alaghbari, E. S. [1 ]
Nazarudin, M. F. [1 ]
Kadri, E. F. [1 ]
机构：
[1] Univ Putra Malaysia, Dept Chem, Fac Sci, Upm Serdang 43400, Selangor, Malaysia
[2] Univ Putra Malaysia, Inst Adv Technol ITMA, Upm Serdang 43400, Selangor, Malaysia
[3] Univ Jordan, Fac Sci, Dept Chem, Amman 11942, Jordan
[4] Univ Putra Malaysia, Dept Phys, Fac Sci, Upm Serdang 43400, Selangor, Malaysia
来源：
CERAMICS INTERNATIONAL | 2012年 / 38卷 / 02期
关键词：
Oxide; Superconductor; Powders: chemical preparation; Chemical properties; HIGH-TC; GROWTH; OXIDES; POWDER;
D O I：
10.1016/j.ceramint.2011.08.048
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Phase formation of REBa2Cu3O7-delta (RE: Y0.5Gd0.5, Y0.5Nd0.5, Nd0.5Gd0.5) superconductors synthesised via co-precipitation (COP) method were investigated by thermogravimetric analysis (TGA), differential thermal analysis (DTA) and X-ray diffraction (XRD) analysis. All samples showed identical thermal decomposition behaviour from the thermogram in which 5 major weight losses were observed. However, XRD of the samples at different heat treatment temperatures showed different diffraction patterns indicating different thermolytic processes. Meanwhile, transmission electron microscopy and surface area analysis revealed that the powders obtained from COP have particle sizes ranging from 7 to 12 nm with relatively large surface area. Molar ratios of prepared samples obtained were near to the theoretical values as confirmed by elemental analyses using X-ray fluorescence (XRF). The T-C(R=0) for sintered YGd, YNd and NdGd were 87 K, 86 K and 90 K, respectively. Surface morphological study via scanning electron microscope showed the structures of samples were dense and non porous. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：1187 / 1193
页数：7
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