Internal Friction In The PFN Ceramics With Chromium Dopand

Zachariasz, R.; Bochenek, Dariusz; Bruś, B.

doi:10.1515/amm-2015-0302

Cited by 4 publications

(4 citation statements)

References 11 publications

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“…The temperature changes of electric permittivity (ε) and the tangent of the angle of dielectric loss (tan δ) for the PBZTMC ceramics are typical for the multicomponent PZT‐type family of ceramics (Figs. a and a) . The PBZTMC ceramics have a sharp phase transition with high values of maximum electric permittivity.…”

Section: Resultsmentioning

confidence: 95%

Ferroelectric–Ferromagnetic Ceramic Composites Based on PZT with Added Ferrite

Niemiec

Bochenek

Chrobak

et al. 2014

Int J Applied Ceramic Tech

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The study presents a ferroelectric-ferromagnetic composite based on a doped PZT-type and ferrite powders. Ferroelectric powder (in amount of 90 wt-%) was based on multicomponent PZT-type materials, while nickel-zinc ferrite Ni 1-x Zn x Fe 2 O 4 (in amount of 10 wt-%) served as the magnetic component of the composite. The syntheses of the ferroelectric-ferromagnetic composite's components were performed using solid-phase sintering, while final densification of the synthesized powder was achieved using free sintering. X-ray analysis of the composite confirmed the presence of strong maxima originating from particular PZTtype material phases, as well as weak peaks from the Ni 0.64 Zn 0.36 Fe 2 O 4 ferrite , without foreign phases. The microstructure of the fracture of the ferroelectric-ferromagnetic composites shows that the ferrite grains on the surface of the ferroelectric component are distributed heterogeneously. Magnetic studies have characterized composite as a soft ferromagnetic material. The study indicated the influence of the magnetic subsystem on the electrical properties. In the two-phase PBZTMC-NZF ceramic composite, the magnetic component causes the decrease in electric permittivity and increased value of the dielectric losses. *przemyslaw.niemiec@us.edu.pl

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Section: Resultsmentioning

confidence: 95%

Ferroelectric–Ferromagnetic Ceramic Composites Based on PZT with Added Ferrite

Niemiec

Bochenek

Chrobak

et al. 2014

Int J Applied Ceramic Tech

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“…It is characterized by inelastic behavior of solids under the impact of external stresses and manifests itself as partial loss of mechanical vibration energy (a portion of the mechanical energy is transformed into thermal energy) [6][7][8][9]. The determination of mechanical losses Q −1 may be performed both through temperature measurements (at constant measuring frequency) and frequency measurements (at constant temperature) [10][11][12]. the composite -PZT-type ferroelectric powder -was synthesized by way of sintering a mixture of simple oxides in the solid phase (compacting method) in conditions of T synth = 1123 K, t synth = 2 h. The second composite component with ferromagnetic properties (Ni 0.64 Zn 0.36 Fe 2 O 4 ferrite powder) was synthesized by way of calcination in conditions of 1273 K/4 h. 90% of the PZT-NiZnFe composite type was made up by ceramic powder, while ferrite powder constituted 10% of the composition.…”

Section: Introductionmentioning

confidence: 99%

Internal friction phenomena in composites based on PZT-type ferroelectric powder and ferrites

2016

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Abstract. The aim of the work was to determine the phenomena of internal friction (mechanical losses) occurring in ferroelectric-ferromagnetic composites created based on PZT-type ferroelectric powder and ferrite. The composites were obtained using ceramic powders -multi-component PZT-type solid solutions with ferroelectric properties. Their magnetic component included zinc-nickel powder Ni0.64Zn0.36Fe2O4. 30 × 10 × 1 mm 3 test specimens were obtained using free sintering. Temperature Q −1 (T ) and amplitude Q −1 (ε) internal friction dependencies were determined. Wide high temperature maxima were observed with regard to the internal friction temperature dependencies obtained for the tested specimens. The conducted measurements of amplitude (isothermal) dependencies of internal friction Q −1 (ε) for the tested composites have allowed for interpreting the previously observed maximum on the temperature dependencies of internal friction.

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“…As a consequence, directive 2002/95/EC was put into effect in July 2006, restricting the use of environmentally hazardous compounds in electrical and electronic equipment. The only exceptions to this rule are piezoelectric lead ceramics due to the fact that so far no one has managed to obtain alternative lead-free materials characterized by such high piezoelectric coefficients [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Study of Phase Transition in Bi3TiNbO9-BaBi2Nb2O9 Ceramics

Adamczyk¹,

Kusz²,

Hofmeister³

et al. 2016

Archives of Metallurgy and Materials

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The subject of the paper is lead free bismuth layer structure oxides (1-x)Bi3TiNbO9-xBaBi2Nb2O9 (x=0; 1; 2; 3 mol). The influence of Bi3TiNbO9/BaBi2Nb2O9 ratio on dielectric and structural properties was studied in a wide range of temperatures. Change in the ratio causes a decrease in the maximum value of dielectric permittivity and shifts the temperature of ε’max to low values, leading to linear decreasing of average grain size and linear increasing of ceramics density. These results indicate an augment of the packing degree and the participation of pores are significantly decreased with the increase of BaBi2Nb2O9 compound intake. Moreover, for 0.7Bi3TiNbO9-0.3BaBi2Nb2O9 ceramics the dielectric phase transition is broadened and the properties characteristic for the ferroelectric relaxor appear.

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Internal Friction In The PFN Ceramics With Chromium Dopand

Cited by 4 publications

References 11 publications

Ferroelectric–Ferromagnetic Ceramic Composites Based on PZT with Added Ferrite

Ferroelectric–Ferromagnetic Ceramic Composites Based on PZT with Added Ferrite

Internal friction phenomena in composites based on PZT-type ferroelectric powder and ferrites

Study of Phase Transition in Bi3TiNbO9-BaBi2Nb2O9 Ceramics

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