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Linear impedance of Bi2VO5.5 ceramic prepared by traditional melt quenching technique measured with impedance spectroscopy method at low temperature region
Opis
The linear electrical properties of Bi2VO5.5 ceramic prepared by traditional melt quenching technique was measured by impedance spectroscopy method.
Bi2VO5.5 ceramic was prepared using two step synthesis:
In the first step, the polycrystalline Bi2VO5.5 ceramic was synthesised via a conventional solid state reaction route. The stoichiometric mixture of initial powders of Bi2O3 and V2O5 were ball-milled in pure acetone for 6 h. The milling was performed in steps of 1 h with rest intervals of 10 min. The mixture was initially heated up to 770 K and then to 1020 K in air. It was kept at this temperature for 24 h and grinded next. The calcined powder was mixed with a small amount of ethyl alcohol binder and cold-pressed into pellets (12 mm in diameter and 2–3 mmin thickness) under a compacting pressure of 26 kNcm−2. The obtained pellets were sintered at 1070 K for 24 h with heating and cooling rates of 50 Kh−1.
In the second step, the obtained Bi2VO5.5 was powdered in mortar and next melted using the conventional melt quenching technique. The melting was conducted in alumina crucibles at 1173 K for few minutes. The melt was poured onto a preheated (573 K) brass plate and pressed by another plate to obtain flat circular disks.
For the electrical measurements gold electrodes were evaporated at the preheated samples. Impedance measurements were carried out in the temperature range from 153 K to 423 K, in the frequency range from 10mHz to 10 MHz and with the ac voltage of 1 Vrms with Concept 40 broadband dielectric spectrometer.
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hexmd5(md5(part1)+md5(part2)+...)-{parts_count} gdzie pojedyncza część pliku jest wielkości 512 MBPrzykładowy skrypt do wyliczenia:
https://github.com/antespi/s3md5
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Informacje szczegółowe
- Rok publikacji:
- 2015
- Data zatwierdzenia:
- 2021-07-14
- Język danych badawczych:
- angielski
- Dyscypliny:
-
- inżynieria materiałowa (Dziedzina nauk inżynieryjno-technicznych)
- DOI:
- Identyfikator DOI 10.34808/tfrh-2565 otwiera się w nowej karcie
- Weryfikacja:
- Politechnika Gdańska
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