ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In order to exploit new strategies for fabricating high-temperature superconductors withspecial morphologies and investigate the effects on their superconductivity, we successfully utilized afacile polyol process for fabricating a large amount of La2CuO4 (LCO) microspheres usingLa(CH3COO)3·1.5H2O and Cu(CH3COO)2·H2O as raw materials and ethylene glycol as both complexagent and solvent. The well crystallized LCO microspheres can be obtained by annealing theLa-Cu-complex precipitation formed after refluxing process at 750 oC for 10 hours. Field-emissionscanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) resultsindicated that the as-prepared sample had an average diameter of about 800 nm. The powder X-raydiffraction (XRD) patterns showed that the LCO microspheres were of pure phase. The magnetizationmeasurement of the sample annealed at 900 oC in pure oxygen for 20 hours showed that thesuperconducting transition temperature (Tc) of the LCO microspheres was about 38 K, which inagreement with that of bulk counterparts
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.2071.pdf
