Relaxor phase transition of polycrystalline (Ba0.90Sr0.10)(Ti0.75Sn0.25)O3

• Autorzy: Kajtoch C.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The purpose of this work was to determinate the influence of the nonferroactive 25% Sn substitutions in (sublattice B) on changes of the character of phase transition (PT) in comparison with pure barium titanate BaTiO3 (BT). Design/methodology/approach: The dielectrometry method was applied in order to measure complex dielectric permittivity and other dielectric functions of ferroelectric (Ba0.90Sr0.10)(Ti0.75Sn0.25)O3 (BSr10TSn25). Findings: It was affirmed, that 25% substitution of Sn ions changed the type of phase transition. The transition was strongly diffused and typical for relaxor materials. The strong dependence of temperature Tm (peak of the electric permittivity ĺ’) on frequency of the applied electric field was observed. It means, that this material belongs to relaxor type. The polar character of this solution was also observed in a broad temperature range (in the paraelectric phase too). This behaviour is connected with the occurrence of polar regions (clusters). Practical implications: The results can be used in order to describe changes of PT in the relaxor solid solutions with nonferroactive substitutions in sublattice B. Originality/value: Value of this work relies on the experimental examination of the dielectric properties of (BSr10TSn25) solid solution. The temperature of the glassy transition Tf and the activation energy was calculated. The low value of the phase angle is connected with the existence of the polar regions. The dielectric phase transition is connected with change of interactions, of average range, in the system of clusters.

Słowa kluczowe

EN

ferroelectrics; solid solution; phase transition; dielectric properties; cluster

PL

ferroelektryki; roztwór stały; przemiana fazowa; właściwości dielektryczne; klaster

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2009
• Tom: Vol. 37, nr 1
• Strony: 44--47
• Opis fizyczny: Bibliogr. 15 poz., rys., tabl.

Twórcy

autor

Kajtoch C.

• Institute of Physics, Pedagogical University, ul. Podchorążych 2, 30-084 Kraków, Poland,

Bibliografia

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