Determination of the complete stoichiometry of Bi-Pb-Sr-Ca-Cu-O-superconductors

Scheurell, S.; Kemnitz, Erhard; Maso, G. N.; Kasin, S. Y.; Naumov, S. W.; Badun, Y. N.

doi:10.1007/bf00321581

Cited by 13 publications

(4 citation statements)

References 13 publications

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“…A special microtitration technique to characterize very small samples has also been developed [53]. High-valent bismuth, lead and cerium also oxidize iodide (equations ( 5)-( 7)), enabling in principle the determination of the total oxidation power of the Bi-, Pband (RE,Ce)-based superconductors by iodometry [54,55]:…”

Section: Iodometrymentioning

confidence: 99%

Determination of oxygen content and metal valences in oxide superconductors by chemical methods

Karppinen¹,

Fukuoka

Niinistö³

et al. 1996

Supercond. Sci. Technol.

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Several methods of chemical analysis, for example various redox titrations and thermogravimetric approaches, have been adapted to establish the oxygen content in superconducting cuprates and to determine the higher oxidation states of copper and other mixed-valent metals. The present review discusses and complements the authors' own experimental results on the oxygen content and metal valence analyses, but literature data from about 150 other references are reviewed as well.

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Section: Iodometrymentioning

confidence: 99%

Determination of oxygen content and metal valences in oxide superconductors by chemical methods

Karppinen¹,

Fukuoka

Niinistö³

et al. 1996

Supercond. Sci. Technol.

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“…To measure the oxygen content of the material, iodometric titration was conducted on a sample prepared as described previously, divided into 7 portions of approx. 0.2 g each [15,16]. Samples were dissolved in 100 ml of 0.33M hydrochloric acid with approx.…”

Section: Methodsmentioning

confidence: 99%

Synthesis, single crystal growth and properties of $Sr_5Pb_3ZnO_{12}$

Winiarski,

Szreder,

Barczyński

et al. 2014

Preprint

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The novel Sr 5 Pb 3 ZnO 12 oxide was synthesized by the solid-state reaction method. The crystal structure was studied by means of the powder x-ray diffraction Rietveld method and was found to be similar to 3 other previously known Sr 5 Pb 3 MO 12 compounds (M = Co, Ni, Cu). Crystals of several hundred microns in size of the new phase were grown in molten sodium chloride and imaged using confocal optical and scanning electron microscopy. Electrical properties were studied using the impedance spectroscopy technique. It was found that Sr 5 Pb 3 ZnO 12 is a dielectric material with rather high relative permittivity (ε r = 22 at 300K) and with activation energy of the dielectric relaxation process E A = 0.80(4) eV . The heat capacity studies reveal the Debye temperature Θ D = 324(1) K.

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“…The index of oxygen nonstoichiometry was determined by iodometric titration according the procedure described in [8].…”

Section: Conductivity Of Lanthanum-strontium Cuprate Lasrcuo 4 -D Andmentioning

confidence: 99%

Conductivity of Lanthanum-Strontium Cuprate LaSrCuO4−δ and Ionic Reversibility of Relevant Electrodes

et al. 2005

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A single-phase sample of the LaSrCuO 3.58 composition is prepared by solid-state synthesis at 1473 K in air. The conductivity of LaSrCuO 3.58 is measured by a four-probe method at direct current in the temperature range from 298 to 1173 K at oxygen partial pressures from 28 to 2.1 × 10 4 Pa. Heating samples above ~670 K is shown to result in a changeover of the conduction type from semiconducting ( p -type) to metallic. Exchange currents at the LSCuO/YSZ interface are measured by impedance spectroscopy. The measurements are carried out in high-density symmetrical cells LSCuO | YSZ | LSCuO, fabricated by hot pressing of powders under a pressure of 3.5 × 10 9 Pa at 773 K. Experimental exchange currents i 0 (varying from 10 -3 to 10 -4 A/cm 2 in the temperature interval from 800 to 1173 K) are comparable with such of materials based of lanthanum-strontium manganite.

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Determination of the complete stoichiometry of Bi-Pb-Sr-Ca-Cu-O-superconductors

Cited by 13 publications

References 13 publications

Determination of oxygen content and metal valences in oxide superconductors by chemical methods

Determination of oxygen content and metal valences in oxide superconductors by chemical methods

Synthesis, single crystal growth and properties of $Sr_5Pb_3ZnO_{12}$

Conductivity of Lanthanum-Strontium Cuprate LaSrCuO4−δ and Ionic Reversibility of Relevant Electrodes

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