Benzoic acid doping to enhance electromagnetic properties of MgB 2 superconductors

W. X. Li; Y. Li; M. Y. Zhu; R. H. Chen; X. Xu; W. K. Yeoh; J. H. Kim; S. X. Dou

doi:10.1109/TASC.2007.899379

Benzoic acid doping to enhance electromagnetic properties of MgB 2 superconductors

W. X. Li, Y. Li, M. Y. Zhu, R. H. Chen, X. Xu, W. K. Yeoh, J. H. Kim, S. X. Dou

Research output: Contribution to journal › Article › peer-review

Abstract

The effect of benzoic acid doping on lattice parameters, microstructure, critical temperature (Tc), critical current density (Jc) and flux pinning force Of MgB2 has been studied. In this work we used benzoic acid as an example of aromatic acids as an additive to MgB2. For different sintering process, actual carbon (C) substitution for boron (B) was estimated to be from 3.5 at% to 5.0 at% of B while Tc dropped about 2-4 K. The advantages of aromatic acid doping include homogeneous mixing of precursor powders, avoidance of expansive nano-additives, production of highly reactive C and significant enhancement in Jc of MgB 2, compared to undoped samples. High level C substitution of B can induce the MgB2 crystals grow into bar shape microstructure. The Jc value of 1.5 × 104 Acm-2 at 5 K and 8 T for preheated 10 wt% C7H6O2 doped MgB 2 sample is higher than that of the undoped MgB2 by a factor of 13. As there are numerous aromatic acids readily available this finding has significant ramifications not only for the fabrication of MgB 2 but also for many C based compounds and composites.

Original language	English
Pages (from-to)	2778-2781
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	17
Issue number	2
DOIs	https://doi.org/10.1109/TASC.2007.899379
Publication status	Published - 2007

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title = "Benzoic acid doping to enhance electromagnetic properties of MgB 2 superconductors",

abstract = "The effect of benzoic acid doping on lattice parameters, microstructure, critical temperature (Tc), critical current density (Jc) and flux pinning force Of MgB2 has been studied. In this work we used benzoic acid as an example of aromatic acids as an additive to MgB2. For different sintering process, actual carbon (C) substitution for boron (B) was estimated to be from 3.5 at% to 5.0 at% of B while Tc dropped about 2-4 K. The advantages of aromatic acid doping include homogeneous mixing of precursor powders, avoidance of expansive nano-additives, production of highly reactive C and significant enhancement in Jc of MgB 2, compared to undoped samples. High level C substitution of B can induce the MgB2 crystals grow into bar shape microstructure. The Jc value of 1.5 × 104 Acm-2 at 5 K and 8 T for preheated 10 wt% C7H6O2 doped MgB 2 sample is higher than that of the undoped MgB2 by a factor of 13. As there are numerous aromatic acids readily available this finding has significant ramifications not only for the fabrication of MgB 2 but also for many C based compounds and composites.",

author = "Li, {W. X.} and Y. Li and Zhu, {M. Y.} and Chen, {R. H.} and X. Xu and Yeoh, {W. K.} and Kim, {J. H.} and Dou, {S. X.}",

year = "2007",

doi = "10.1109/TASC.2007.899379",

language = "English",

volume = "17",

pages = "2778--2781",

journal = "IEEE Transactions on Applied Superconductivity",

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publisher = "Institute of Electrical and Electronics Engineers",

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T1 - Benzoic acid doping to enhance electromagnetic properties of MgB 2 superconductors

AU - Li, W. X.

AU - Li, Y.

AU - Zhu, M. Y.

AU - Chen, R. H.

AU - Xu, X.

AU - Yeoh, W. K.

AU - Kim, J. H.

AU - Dou, S. X.

PY - 2007

Y1 - 2007

N2 - The effect of benzoic acid doping on lattice parameters, microstructure, critical temperature (Tc), critical current density (Jc) and flux pinning force Of MgB2 has been studied. In this work we used benzoic acid as an example of aromatic acids as an additive to MgB2. For different sintering process, actual carbon (C) substitution for boron (B) was estimated to be from 3.5 at% to 5.0 at% of B while Tc dropped about 2-4 K. The advantages of aromatic acid doping include homogeneous mixing of precursor powders, avoidance of expansive nano-additives, production of highly reactive C and significant enhancement in Jc of MgB 2, compared to undoped samples. High level C substitution of B can induce the MgB2 crystals grow into bar shape microstructure. The Jc value of 1.5 × 104 Acm-2 at 5 K and 8 T for preheated 10 wt% C7H6O2 doped MgB 2 sample is higher than that of the undoped MgB2 by a factor of 13. As there are numerous aromatic acids readily available this finding has significant ramifications not only for the fabrication of MgB 2 but also for many C based compounds and composites.

AB - The effect of benzoic acid doping on lattice parameters, microstructure, critical temperature (Tc), critical current density (Jc) and flux pinning force Of MgB2 has been studied. In this work we used benzoic acid as an example of aromatic acids as an additive to MgB2. For different sintering process, actual carbon (C) substitution for boron (B) was estimated to be from 3.5 at% to 5.0 at% of B while Tc dropped about 2-4 K. The advantages of aromatic acid doping include homogeneous mixing of precursor powders, avoidance of expansive nano-additives, production of highly reactive C and significant enhancement in Jc of MgB 2, compared to undoped samples. High level C substitution of B can induce the MgB2 crystals grow into bar shape microstructure. The Jc value of 1.5 × 104 Acm-2 at 5 K and 8 T for preheated 10 wt% C7H6O2 doped MgB 2 sample is higher than that of the undoped MgB2 by a factor of 13. As there are numerous aromatic acids readily available this finding has significant ramifications not only for the fabrication of MgB 2 but also for many C based compounds and composites.

UR - http://handle.uws.edu.au:8081/1959.7/529157

U2 - 10.1109/TASC.2007.899379

DO - 10.1109/TASC.2007.899379

M3 - Article

SN - 1051-8223

VL - 17

SP - 2778

EP - 2781

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

IS - 2

ER -

Benzoic acid doping to enhance electromagnetic properties of MgB 2 superconductors

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