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4 articles for “Manganites”
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Effect of Sintering Temperature on Dielectric Behavior of Y0.95Ca0.05MnO3 Manganites
Abstract: Ca-doped mixed valent Y0.95Ca0.05MnO3 (YCMO) manganites, synthesized using cost effective acetic acid based modified sol-gel method, sintered at various temperatures, exhibit a strong effect of sintering temperature on the structure, microstructure, dielectric and activation energy (Ea). Oxygen vacancies, located at the grain boundaries of the nanostructured YCMO samples, play an important role in governing the dielectric behavior. The peak behavior, observed in imaginary part of dielectric (εʹʹ vs. T) plots, …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 3, Issue 2, 2013 · pp. 24–29 Read article
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Effect of Sintering Temperature on Current-Voltage Characteristics of Nanostructured Manganites
Abstract: Normal 0 false false false EN-IN X-NONE GU MicrosoftInternetExplorer4 In the present communication, nanostructured Y0.95Ca0.05MnO3 manganites using low cost sol-gel method have been synthesized. Samples were sintered at different temperatures in order to change the particle size of the samples. The crystallite size is found to increase with sintering temperature due to crystal agglomeration effect. To understand the transport properties of the presently studied samples, current-voltage (I-V) characteristics have been …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 4, Issue 1, 2014 · pp. 1–5 Read article
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Effect of Disorder in Nanocrystalline La0.5Pr0.2Ca1–xBaxMnO3 Manganites
Abstract: Nanocrystalline samples of La0.5Pr0.2Ca0.3–xBaxMnO3 (LPCBMO) (x = 0.05, 0.10, 0.15, 0.20, 0.25 and 0.30) manganites were successfully synthesized by employing prolonged grinding process in conventional solid-state reaction route. The obtained value of crystallite size (CS) varies from 76 nm in lower doped sample (x = 0.05) to 13 nm in the sample doped with Ba2+ (x) = 0.05. The variation in CS with x has been discussed in the context …
Published in Nano Trends – A Journal of Nano Technology & Its Applications · Vol. 16, Issue 1, 2014 Read article
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Electrochemical Recovery of MnO2 from Spent Alkaline Batteries
Abstract: In the alkaline batteries of Zn/MnO2, the electrolytic manganese dioxide (EMD) is used as cathode that constitutes a very important part of household waste which contributes with heavy metals to the solid urban waste. This paper described the recovery of EMD by electro-oxidation on carbon cloth in acidic leached liquors from spent alkaline batteries. The maximum extraction for Mn and Zn were 43.68% (0.744 molL-1) and 56.11% (0.7321 molL-1) respectively. …
Published in Journal of Materials & Metallurgical Engineering · Vol. 9, Issue 3, 2019 · pp. 9–16 Read article