Phase transition characteristics and dielectric properties of rare-earth (La, Pr, Nd, Gd) doped Ba(Zr0.09Ti0.91)O3 ceramics

Diez-Betriu, X.; García, José E.; Ostos, C.; Boya, A.U.; Ochoa, Diego A.; Mestres, L.; Pérez, R.

doi:10.1016/j.matchemphys.2010.10.027

Cited by 101 publications

(31 citation statements)

References 19 publications

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“…A lot of work was carried out in evaluating the properties of the doped BaTiO 3 ceramics. The effect of dopants ranging from metals, semiconductors to insulators including rare-earth dopants like La, Nd, Pr, Gd on the dielectric and ferroelectric properties were investigated [4][5][6]. Zr is chosen as a B site dopant for such ABO 3 type perovskites due to its effective role in minimising the dielectric loss at low frequencies.…”

Section: Introductionmentioning

confidence: 99%

Influence of ZrO_2 Addition on the Structure and Dielectric Properties of BaTiO_3 Ceramics

Öksüz

Şen

2017

Acta Phys. Pol. A

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Ba(Ti1−xZrx)O3 (x = 0 ÷ 0.3) ceramics were prepared by the standard solid state reaction method and were sintered at 1450• C for 4 h. The structural and dielectric properties of the samples were studied. The phases formed in the ZrO2 doped BaTiO3 were tetragonal and of cubic symmetry. Increase in ZrO2 content in the BaTiO3 caused to increase of the lattice parameter and crystallite size of the perovskite structure. The evolution of the Raman spectra was studied for various compositions and the spectroscopic signature of the corresponding phase was determined. The scanning electron microscope was used to investigate the microstructure and surface morphology of the sintered samples. Scanning electron microscope observations revealed enhanced microstructural uniformity and retarded grain growth with increase of ZrO2 content. Dielectric characteristics of ZrO2 doped barium titanate were studied using a Hioki 3532-50 LCR meter in the frequency range of 1 kHz-1 MHz. It is found that the dielectric constant (εr) increases while the dielectric loss (tan δ) decreases with increase in zirconium oxide content (x < 0.3).

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Section: Introductionmentioning

confidence: 99%

Influence of ZrO_2 Addition on the Structure and Dielectric Properties of BaTiO_3 Ceramics

Öksüz

Şen

2017

Acta Phys. Pol. A

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“…The size of such devices can be reduced by replacing dielectric layers with a relatively high-dielectric material. Barium titanate, BaTiO 3 (BT), is an important classical perovskite-type compound, and has been one of the most studied ferroelectrics over recent decades, not only from the fundamental point of view but also for its versatile applications in electronic and memory devices [3]. High dielectric constant values are usually associated to ferroelectric or relaxor materials [4,5] and also the grain boundary plays the main role in the dielectric behaviour of ceramic [6].…”

Section: Introductionmentioning

confidence: 99%

“…3 represents the Rietveld refined diffractogram showing the degree of fit. The refined parameters (R p , R wp and R exp X-ray diffraction of Li 0.5 Bi 0.5 TiO 3 ceramics sintered at…”

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confidence: 99%

Quantitative structural analysis, phase transition and relaxor nature of Bi0.5Li0.5TiO3 ceramic prepared by mechanical alloying

Nayak

Panigrahi

2016

J Mater Sci: Mater Electron

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Bi 0.5 Li 0.5 TiO 3 (LBT) ceramics was prepared by mechanochemical synthesis and sintered at 600°C. Quantitative structural analysis was carried out and various structural parameters are presented here along with Rietveld refinement data. The dielectric study was carried out and observed that, presence of two dielectric anomalies in all frequencies signifies the phase transformation from ferroelectric to anti-ferroelectric at temp (T d ) 133.32°C and from anti ferroelectric phase to paraelectric phase at temp (T c ). 352.904°C for the first and second curve respectively. Different dielectric parameters and dielectric loss values T d and T c are noted. The values of e m , e r and tan d at temperatures T d , T c and T r (room temperature) at 10 kHz are presented in this study.

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“…For instance, the temperature of phase transition is drastically decreased by addition of rare-earth ions and a relaxor-type behavior is induced [28], in a manner similar to the effects of an increment of zirconium. Both the diffusivity of the phase transition and the degree of relaxor behavior increase with the rise of the rare earth content [29][30][31][32][33]. It is widely accepted that the behavior of the polar regions in the material is key to the behavior of RFE [34,35].…”

Section: Introductionmentioning

confidence: 99%

Glassy behavior study of dysprosium doped barium zirconium titanate relaxor ferroelectric

Badapanda

2014

J Adv Ceram

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Abstract:We report the glassy behavior of dysprosium doped barium zirconium titanate single phase perovskite ceramics with general formula Ba 1x Dy 2x/3 Zr 0.25 Ti 0.75 O 3 prepared by solid-state reaction method. Temperature and frequency dependent dielectric studies of the ceramics reveal relaxor behavior. A non-Debye relaxation, which is analogous to the magnetic relaxation in spin-glass system, is observed clearly around temperature of dielectric permittivity maximum (T m ). Frequency dependence of T m governed by production of polar nano-regions is analyzed using Debye relation, Vogel-Fulcher (V-F) relation and power law. A clear change in dynamic behavior is observed by power parameter which is related to growth of interactions between polar nano-regions with different composition. Various parameters like activation energy for relaxation, freezing temperature, relaxation frequency, etc., are determined after non-linear curve fitting. Temperature dependence of dielectric constant at temperatures much higher and lower than T m is analyzed by two exponential functions, which gives an idea about the production of polar clusters at high temperature and distribution of freezing temperatures at lower temperature. Various other associated parameters are calculated by non-linear curve fitting and their significance has been explained.

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Phase transition characteristics and dielectric properties of rare-earth (La, Pr, Nd, Gd) doped Ba(Zr0.09Ti0.91)O3 ceramics

Cited by 101 publications

References 19 publications

Influence of ZrO_2 Addition on the Structure and Dielectric Properties of BaTiO_3 Ceramics

Influence of ZrO_2 Addition on the Structure and Dielectric Properties of BaTiO_3 Ceramics

Quantitative structural analysis, phase transition and relaxor nature of Bi0.5Li0.5TiO3 ceramic prepared by mechanical alloying

Glassy behavior study of dysprosium doped barium zirconium titanate relaxor ferroelectric

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