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Sintering Effects on Microstructure and Electrical Properties of CaCu3Ti4O12 Ceramics

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2013
Markovic_Ceramic Transactions_240_2013.pdf (2.931Mb)
Аутори
Marković, Smilja
Lukić, Miodrag
Jovalekić, Čedomir
Škapin, Srečo Davor
Suvorov, Danilo
Uskoković, Dragan
Поглавље у монографији (Рецензирана верзија)
Метаподаци
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Апстракт
CCTO powders were prepared by solid state reaction and mechanochemically, respectively. Synthesized powders were characterized by XRD, FE-SEM and PSA techniques. The sinterability of CCTO powders was investigated by heating microscopy. Powders were uniaxially pressed into pellets and sintered up to 1100 °C, with heating rates of 2, 5, 10 and 20 °/min. The recorded shrinkage curves were used for choosing conventional and two step sintering (TSS) conditions. By TSS the samples were heated up to 1070 °C and after retention for 10 min cooled down to 1020 °C and kept for 20 h. The microstructure of CCTO ceramics sintered by conventional and TSS techniques was examined by FE-SEM method; the electrical properties were investigated in medium frequency (MF) range (42 Hz-5 MHz) and in the microwave (MW) range of frequencies. Electrical properties of the sintered CCTO ceramics were correlated to the samples microstructure. Finally, we have shown that appropriate choice of sintering conditions is ...important for preparation of high-quality CCTO ceramics with high dielectric permittivity in the kilohertz range as well as at the resonant frequency.

Кључне речи:
calcium copper titanate / electrical properties / microstructure / sintering effects / solid state reaction
Извор:
Processing and Properties of Advanced Ceramics and Composites V, 2013, 337-348
Издавач:
  • John Wiley & Sons
Пројекти:
  • Молекуларно дизајнирање наночестица контролисаних морфолошких и физичко-хемијских карактеристика и функционалних материјала на њиховој основи (RS-45004)
Напомена:
Ceramic Transactions, Volume 240

DOI: 10.1002/9781118744109.ch37

[ Google Scholar ]
URI
http://dais.sanu.ac.rs/123456789/512
http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/778
http://www.itn.sanu.ac.rs/opus4/files/778/Markovic_Ceramic%20Transactions_240_2013.pdf
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