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Influence mechanism of secondary gel technique on Bi-2212 superconducting phase: Gel model simulation and verification
Yang, Huazhe; Shahzad, M. Babar; Yu, Xiaoming; Qi, Yang; Qi, Y (reprint author), Northeastern Univ, Inst Mat Phys & Chem, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China.; Yang, HZ (reprint author), China Med Univ, Dept Phys, Shenyang 110122, Peoples R China.
2016-06-05
发表期刊MATERIALS & DESIGN
ISSN0264-1275
卷号99页码:115-119
摘要Study of gel structures as precursors for Bi2Sr2Ca1Cu2Ox, (Bi-2212) superconductors can provide better understanding of the role of gel process in the synthesis of superconducting phase. However, it is still challenging to investigate the amorphous gel system through conventional methods. Here, based on our former experiments, we present a computer simulation method to establish the geometric structural models of ethylenediaminetetraacetic acid (EDTA)-metal cation complexes, conventional gel and home-made secondary gel. Local orbital density functional method, Dmol(3) approach was applied to optimize the structures and compare the thermodynamical stabilities of different systems. In addition, Bi-2212 samples with different sintering time were prepared via both conventional and secondary gel technique to verify the calculation results. Results demonstrated that the secondary gel system possesses higher phase stability compared to the conventional gel owing to its higher bonding ability of EDTA-metal cation complexes. Hence, component homogeneity of complexes can be enhanced and pure Bi-2212 phase can be synthesized with shorter sintering time. (C) 2016 Elsevier Ltd. All rights reserved.
部门归属[shahzad, m. babar ; yu, xiaoming ; qi, yang] northeastern univ, inst mat phys & chem, sch mat sci & engn, shenyang 110819, peoples r china ; [yang, huazhe] china med univ, dept phys, shenyang 110122, peoples r china ; [shahzad, m. babar ; yu, xiaoming] chinese acad sci, inst met res, shenyang 110016, peoples r china
关键词Secondary Gel Bi-2212 Thermodynamic Calculation Component Homogeneity
学科领域Materials Science
资助者National Science Foundation of China [51172040, 81500897]; China Scholarship Council [201408210385]; Foundation of the Education Department of Liaoning Province in China [L2013285]; Science and Technology Planning Project of Shenyang City [F11-262-9-16]
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/75838
专题中国科学院金属研究所
通讯作者Qi, Y (reprint author), Northeastern Univ, Inst Mat Phys & Chem, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China.; Yang, HZ (reprint author), China Med Univ, Dept Phys, Shenyang 110122, Peoples R China.
推荐引用方式
GB/T 7714
Yang, Huazhe,Shahzad, M. Babar,Yu, Xiaoming,et al. Influence mechanism of secondary gel technique on Bi-2212 superconducting phase: Gel model simulation and verification[J]. MATERIALS & DESIGN,2016,99:115-119.
APA Yang, Huazhe,Shahzad, M. Babar,Yu, Xiaoming,Qi, Yang,Qi, Y ,&Yang, HZ .(2016).Influence mechanism of secondary gel technique on Bi-2212 superconducting phase: Gel model simulation and verification.MATERIALS & DESIGN,99,115-119.
MLA Yang, Huazhe,et al."Influence mechanism of secondary gel technique on Bi-2212 superconducting phase: Gel model simulation and verification".MATERIALS & DESIGN 99(2016):115-119.
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