| Autor: |
Bankar, S. B., Meshram, N. S., Sarkar, N. N., Ahamad, H. S., Dhobale, S. J., Rewatkar, K. G. |
| Předmět: |
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| Zdroj: |
Ferroelectrics; 2018, Vol. 526 Issue 1, p187-192, 6p |
| Abstrakt: |
Nano-size Y-type hexaferrites powders are synthesized by using the sol-gel combustion method in nitrate urea systems. The spectra of FTIR, TGA, and DSC indicate that urea acid and nitrate ions were decomposed at the temperature between 170°C and 200°C. The X-ray diffraction patterns of Ca2Cu2Fe12O22 annealed above 800°C manifest that all the species have hexagonal crystal structure. TEM observation of as-burnt powders of Ca2Cu2Fe12O22 shows the powder particles have an average particle size of 70 nm. Magnetic hysteresis loop measurements of the series Ca2Cu2Fe12O22, exhibit that the saturation magnetization (Ms), the remanent magnetization (Mr) and the coercitivity (Hc) of compounds depend strongly on the chemical composition of materials. The maxium values of Ms (0.54526 emu/g) and Mr (87.099E-3 emu/g) and the areas of magnetic hysteresis loop of compounds decrease with increasing the value of Cu. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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