caa a22 4500 463191714 CHVBK 20180406164911.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10973-006-7538-x doi (NATIONALLICENCE)springer-10.1007/s10973-006-7538-x Production of bscco bulk high T c superconductors by sol-gel method and their characterization by ftir and XRD techniques [Elektronische Daten] [M. Arshad, A. Qureshi, K. Masud, N. Qazi] The production of bulk high T c superconducting phase (2223) by EDTA-gel (ethylenediaminetetraacetic acid) techniques has been investigated. It is shown that close control of pH is necessary for the production of a well-complexed precursor which allows subsequent decomposition in two stages at 300 and 800°C. The problem of carbonate formation was investigated experimentally and solved. Precursors are characterised by Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) and the sintering behaviour was monitored by dilatometry. At least three different phases Bi2Sr2Cax−1CuxO8+y (BSCCO); where x=1, 2, 3 were identified within superconducting pellets using XRD, named as Bi2Sr2CuO7 (2201), Bi2Sr2CaCu2O9 (2212) and Bi2Sr2Ca3O10 (2223). The superconducting properties of the sintered samples were studied by vibrating sample magnetometer (VSM). Transition to a superconducting state around 80 K appeared in samples (sintered at 845°C) containing the Bi2Sr2Ca1Cu2Oy (2212) phase. Liquid phase sintering of the samples aided the formation of Bi2Sr2Ca2Cu3Ox (2223) phase at high temperature (860°C), which showed a superconducting transition temperature of 108 K. Springer Science+Business Media LLC, 2007 BSCCO system nationallicence FTIR study nationallicence high Tc phase nationallicence pH effect nationallicence sol-gel technique nationallicence superconducting phases nationallicence XRD study nationallicence Arshad M. APD, PINSTECH, Nilore, Islamabad, Pakistan aut Qureshi A. NMD, PINSTECH, Nilore, Islamabad, Pakistan aut Masud K. CPC, Project, D.G. Khan, P.O. Box 27, Punjab, Pakistan aut Qazi N. NMD, PINSTECH, Nilore, Islamabad, Pakistan aut Journal of Thermal Analysis and Calorimetry Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 89/2(2007-08-01), 595-600 1388-6150 89:2<595 2007 89 10973 https://doi.org/10.1007/s10973-006-7538-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-006-7538-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Arshad M. APD, PINSTECH, Nilore, Islamabad, Pakistan aut NATIONALLICENCE 700 1- Qureshi A. NMD, PINSTECH, Nilore, Islamabad, Pakistan aut NATIONALLICENCE 700 1- Masud K. CPC, Project, D.G. Khan, P.O. Box 27, Punjab, Pakistan aut NATIONALLICENCE 700 1- Qazi N. NMD, PINSTECH, Nilore, Islamabad, Pakistan aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 89/2(2007-08-01), 595-600 1388-6150 89:2<595 2007 89 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer