Effect of temperature and concentration of solution in chemical treatment for MgB2 powder on the Jc–B property of ex situ processed MgB2 superconducting tapes
Effect of temperature and concentration of solution in chemical treatment for MgB2 powder on the Jc–B property of ex situ processed MgB2 superconducting tapes
复制标题
MgB2粉末化学处理温度和溶液浓度对异位处理MgB2超导带材Jc-B性能的影响
DOI:
10.1016/j.physc.2010.01.065
复制
发表时间:
2010
影响因子:
1.7
通讯作者:
K. Ozawa
中科院分区:
文献类型:
--
作者:
H. Fujii;K. Ozawa
MgB{sub 2} tapes were fabricated through an ex situ process in a powder-in-tube (PIT) technique using powders treated at elevated temperatures in benzene solutions of benzoic acid with various concentrations. The amount of carbon substitution in MgB{sub 2} in heat-treated tapes with treatment at the boiling points (BPs) of the solutions is smaller than that at room temperature (RT). This carbon substitution improves the J{sub c} property in the high-field region. For RT treatment, the J{sub c} property is improved with increasing the solution concentration. In contrast, the J{sub c} property is deteriorated with increasing the concentration for BP treatment. On the other hand, treatment with pure solvent does not bring about the J{sub c} enhancement and carbon substitution at all at both RT and the BPs. This suggests that acidity essential for the dissolution of MgO layers attached to the surface of MgB{sub 2} is required for carbon substitution. The BP treatment enhances the acting of the acidity and possibly inflicts damage on MgB{sub 2} itself.
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DOI:
--
发表时间:
2008
期刊:
J.Mater.Res. 23
影响因子:
--
作者:
Y. Takase;T. Soh;O. Hashimoto;橋本 修;橋本修;日本建築学会編 橋本 修 監修;橋本 修;H.Fujii,K.Togano and K.Ozawa;H.Fujii,K.Togano and K.Ozawa
通讯作者:
H.Fujii,K.Togano and K.Ozawa
DOI:
--
发表时间:
2007
期刊:
J.Mater.Res. 22
影响因子:
--
作者:
Y. Inoue;他5名;H.Fujii,K.Togano and K.Ozawa
通讯作者:
H.Fujii,K.Togano and K.Ozawa
DOI:
--
发表时间:
2006
期刊:
Supercond. Sci. Technol. Vol. 19
影响因子:
--
作者:
H. Yamada;M. Hirakawa;H. Kumakura;H. Kitaguchi
通讯作者:
H. Kitaguchi
影响因子:
4
作者:
Dou, SX;Soltanian, S;Tomsic, M
通讯作者:
Tomsic, M