The Positive Temperature Coefficient of Resistivity Effect in the Pb(Fe_{1/2}Nb_{1/2})O_{3} Ceramics Admixed with Lithium

• Authors: D. Bochenek
• Languages of publication: EN

Abstracts

EN

In the paper technological conditions were looked for to obtain the Pb(Fe_{1/2}Nb_{1/2})O_{3} (PFN) ceramics and the PFN ceramics with the lithium admixture with the highest electric conduction and conditions appropriate for the PTC-R effect formation. Measurements of dc electrical resistivity, dielectric permittivity and dielectric loss were made as functions of temperature from room temperature to 190°C, at 1 kHz. The best set of values of dielectric loss and dielectric constant, from the ferroelectricity point of view, were obtained when the precursor with orthorhombic structure was employed. By creating appropriate technological conditions in the PFN ceramics the PTC-R effect can occur above the Curie temperature. Their electric properties are determined by presence of a basic phase of the potential barrier on the grain boundaries.

Keywords

EN

77.80.-e; 77.80.Bh; 77.22.Gm

Discipline

• 77.22.Gm: Dielectric loss and relaxation
• 77.80.-e: Ferroelectricity and antiferroelectricity

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 116
• Issue: 3
• Pages: 268-270

Dates

published

2009-09

Contributors

author

D. Bochenek

• Department of Materials Science, University of Silesia, Śnieżna 2, 41-200 Sosnowiec, Poland

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Identifiers

DOI

10.12693/APhysPolA.116.268