Enhancing the Sinterability of Chemically-Derived Tl1212 Superconducting Powders Using Nano-Sized MgO as Sintering Aid

Faizah Md. Salleh; Ahmad K. Yahya; Mohammad Hafizuddin Haji Jumali

doi:10.4028/www.scientific.net/AMR.418-420.914

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 418-420Enhancing the Sinterability of Chemically-Derived...

Enhancing the Sinterability of Chemically-Derived Tl1212 Superconducting Powders Using Nano-Sized MgO as Sintering Aid

Abstract:

The superconducting Tl_0.8Bi_0.2Sr₂Ca_0.8Y_0.2Cu₂O₇ powder prepared from chemical route was mixed with varying amounts of nano-sized MgO powders (x=0 to 0.50 wt. %) to form bulk superconducting composites. XRD results show that the addition of 0.15 wt.% nano-MgO is accompanied by an increase in 1212-phase and the disappearance of SrCO₃ impurity. SEM investigations revealed more regular-shaped and smaller grains microstructure for MgO added samples in contrast to MgO-free sample which revealed irregular shaped grains. EDS showed homogenous distribution of Mg for all MgO-added samples with the exception of x=0.50 where agglomeration of MgO particles were observed. However, MgO added samples exhibit lower zero-resistance critical temperature, T_{c zero} than the MgO-free sample.

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Advanced Materials Research (Volumes 418-420)

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914-917

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.418-420.914

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Online since:

December 2011

Authors:

Faizah Md. Salleh, Ahmad K. Yahya, Mohammad Hafizuddin Haji Jumali

Keywords:

Sintering Aids, Superconductivity, Tl1212

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