Eur. Phys. J. AP
Volume 14, Number 2, May 2001
|Page(s)||79 - 86|
|Section||Semiconductors and Devices|
|Published online||15 May 2001|
Dependence of some Bi1.7Pb0.3Sr2Ca2Cu3Oy physical properties on the annealing period
Physics Department, Faculty of Science, South Valley University, Sohag, Egypt
Corresponding author: Khalil_20002000@yahoo.com
Revised: 6 February 2001
Accepted: 6 February 2001
Published online: 15 May 2001
By using solid state ceramic synthesis technique, we have produced high-Tc superconducting ceramics with a fixed nominal composition of Bi1.7Pb0.3Sr2Ca2Cu3Oy (BSCCO). Annealing treatments in air at 800 °C for different time periods from 6 to 30 h were carried out for the BSCCO samples. The influence of annealing time on the superconducting and mechanical properties were examined by measurements of thermoelectric power (TEP), X-ray diffraction, surface morphology, bulk density and Vickers microhardness (V H N). The results reveal that the most appropriate annealing time to obtain the highest peak intensity of high-Tc phase (2223), highest and sharpest transition temperature (), maximum value of density and maximum of V H N is 18 h. Prolongation of the annealing time was associated with a reduction of all these parameters. These observations show that the annealing treatment plays an important role for producing consolidate superconducting compounds with improved mechanical properties.
PACS: 74.72.Jt – Other cuprates
© EDP Sciences, 2001
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