Effect of Semiconductor Element Substitution on the Electric Properties of Barium Titanate Ceramics

• Autorzy: Garbarz-Glos B. , Lisińska-Czekaj A. , Czekaj D. , Bąk W.

Identyfikatory

DOI

10.1515/amm-2016-0150

• Języki publikacji: EN

Abstrakty

EN

The investigated ceramics were prepared by a solid-state reaction from simple oxides and carbonates with the use of a mixed oxide method (MOM). The morphology of BaTi_0.96Si_0.04O₃ (BTSi04) ceramics was characterised by means of a scanning electron microscopy (SEM). It was found that Si⁺⁴ ion substitution supported the grain growth process in BT-based ceramics. The EDS results confirmed the high purity and expected quantitative composition of the synthesized material. The dielectric properties of the ceramics were also determined within the temperature range (ΔT=130-500K). It was found that the substitution of Si⁺⁴ ions had a significant influence on temperature behavior of the real (ε’) and imaginary (ε”) parts of electric permittivity as well as the temperature dependence of a.c. conductivity. Temperature regions of PTCR effect (positive temperature coefficient of resistivity) were determined for BTSi04 ceramics in the vicinity of structural phase transitions typical for barium titanate. No distinct maximum indicating a low-temperature structural transition to a rhombohedral phase in BTSi04 was found. The activation energy of conductivity was determined from the Arrhenius plots. It was found that substitution of Si ions in amount of 4wt.% caused almost 50% decrease in an activation energy value.

Słowa kluczowe

EN

barium titanate; ceramics; dielectric permittivity; electric conductivity; phase transitions; PTCR effect

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2016
• Tom: Vol. 61, iss. 2A
• Strony: 887--890
• Opis fizyczny: Bibliogr. 14 poz., rys.

Twórcy

autor

Garbarz-Glos B.

• Pedagogical University, Institute of Engineering, 2 Podchorążych Str., 30-084 Cracow, Poland

autor

Lisińska-Czekaj A.

• University of Silesia in Katowice, Institute of Technology and Mechatronics, 12 Żytnia Str., 41-200, Sosnowiec, Poland

autor

Czekaj D.

• University of Silesia in Katowice, Institute of Technology and Mechatronics, 12 Żytnia Str., 41-200, Sosnowiec, Poland

autor

Bąk W.

• Pedagogical University, Institute of Physics, 2 Podchorążych Str., 30-084 Cracow, Poland

Bibliografia

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