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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
Source PublicationMATERIALS & DESIGN
ISSN0264-1275
Volume99Pages:115-119
AbstractStudy 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.
description.department[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
KeywordSecondary Gel Bi-2212 Thermodynamic Calculation Component Homogeneity
Subject AreaMaterials Science
Funding OrganizationNational 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]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75838
Collection中国科学院金属研究所
Corresponding AuthorQi, 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.
Recommended Citation
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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