Aging of Dielectric Dispersion in PLZT Relaxor Ceramics

Schulze, Walter A.; Biggers, J. V.; Cross, L. E.

doi:10.1111/j.1151-2916.1978.tb09227.x

Cited by 79 publications

(23 citation statements)

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“…The strong aging of the susceptibility of some relaxors [9,10] looks prima facie strongly similar to the corresponding phenomenon in spin glasses [11][12][13]. Both aging effects are much stronger than those found in typical dipolar glasses [14].…”

Section: (Received 3 May 2000)mentioning

confidence: 92%

Aging in a Relaxor Ferroelectric: Scaling and Memory Effects

et al. 2000

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A crossover as a function of temperature is found in the zero-field aging properties of the relaxor ferroelectric Pb(Mg(1/3)Nb(2/3))O3. Below a temperature near which nonlinear susceptibility has indicated a suspected phase transition, the time-frequency dependence shows simple scale-independent behavior resembling that for spin glasses. As in spin glasses, high temperature aging is stable as further aging occurs at lower temperature, but not vice versa, indicating hierarchical state arrangement. A more general interpretation of such effects is briefly discussed.

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Section: (Received 3 May 2000)mentioning

confidence: 92%

Aging in a Relaxor Ferroelectric: Scaling and Memory Effects

et al. 2000

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“…In fact, it was later shown in the two representative relaxors, PLZT (Ref. 67) and PMN-0.1 mol%PbTiO 3 , 68 that aging could make the typical dielectric permittivity profile of relaxor materials almost identical with that observed in BNT-based materials, i.e., two successive dielectric anomalies, frequency-dispersive one at a lower temperature and frequency-independent at a higher temperature.…”

Section: A Dielectric Permittivitymentioning

confidence: 99%

“…Between the two, it is highly likely that the aging effect is ruled out from the following reasons. The temperature for the T s , which is highly sensitive to the aging temperature, 67,68 does not vary from study to study, though the processing condition for each study cannot be the same. Also, even after a thermal annealing at sufficiently high temperature (see, for example, Fig.…”

Section: Bnt-6bt As a Relaxormentioning

confidence: 99%

On the phase identity and its thermal evolution of lead free (Bi1/2Na1/2)TiO3-6 mol% BaTiO3

Schaab

Sapper

et al. 2011

Journal of Applied Physics

758

540

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Articles you may be interested inElectric-field-temperature phase diagram of the ferroelectric relaxor system (1−x)Bi1/2Na1/2TiO3−xBaTiO3 doped with manganese J. Appl. Phys. 115, 194104 (2014); 10.1063/1.4876746Long ranged structural modulation in the pre-morphotropic phase boundary cubic-like state of the lead-free piezoelectric Na1/2Bi1/2TiO3-BaTiO3 J. Appl. Phys. 114, 234102 (2013) On the phase identity and its thermal evolution of lead free (Bi 1/2 Na 1/2 )TiO 3 -6 mol% BaTiO 3 Temperature-dependent dielectric permittivity of 0.94(Bi 1/2 Na 1/2 )TiO 3 -0.06BaTiO 3 (BNT-6BT) lead-free piezoceramics was studied to disentangle the existing unclear issues over the crystallographic aspects and phase stability of the system. Application of existing phenomenological relaxor models enabled the relaxor contribution to the entire dielectric permittivity spectra to be deconvoluted. The deconvoluted data in comparison with the temperature-dependent dielectric permittivity of a classical perovskite relaxor, La-modified lead zirconate titanate, clearly suggest that BNT-6BT belongs to the same relaxor category, which was also confirmed by a comparative study on the temperature-dependent polarization hysteresis loops of both materials. Based on these results, we propose that the low-temperature dielectric anomaly does not involve any phase transition such as ferroelectric-toantiferroelectric. Supported by transmission electron microscopy and X-ray diffraction experiments at ambient temperature, we propose that the commonly observed two dielectric anomalies are attributed to thermal evolution of ferroelectric polar nanoregions of R3c and P4bm symmetry, which coexist nearly throughout the entire temperature range and reversibly transform into each other with temperature.

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“…Debido a que la estructura perovskita es capaz de incorporar un gran número de átomos, los óxidos tipo perovskita presentan muchas propiedades útiles, tales como conductividad iónica [2], superconductividad [3], magnetorresistencia [4] y ferroelectricidad [5], entre otras. Recientemente han cobrado un gran interés este tipo de óxidos debido a la diversidad en composiciones y estructuras que pueden presentar las propiedades antes mencionadas.…”

Section: Introductionunclassified

Síntesis en medio poli-alcohólico y caracterización de Perovskitas BaHfO3 y BaZrO3

et al. 2013

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RESUMENLos materiales tipo perovskita (ABO 3 ) presentan considerable interés tecnológico, sus propiedades dependen de los elementos A y B que los sustituyan. Para la elaboración de materiales tipo perovskita se han empleado diversos métodos. En este trabajo se presentan los resultados obtenidos para el BaHfO 3 y BaZrO 3 utilizando la síntesis poliol. Se usaron sales inorgánicas disueltas en dietilenglicol y los materiales recuperados han sido tratados térmicamente a 700 °C y 900 °C. El análisis por difracción de rayos X reveló la estructura cúbica tipo perovskita y se observaron adicionalmente picos correspondientes a las fases secundarias de BaCO 3 y MO 2 (M=Hf o Zr) en ambos materiales. Los espectros obtenidos por FTIR pusieron en evidencia la presencia de BaCO 3 . Las observaciones por microscopía electrónica de barrido revelaron para ambos casos, materiales muy compactos conformados por sub-estructuras más pequeñas en forma de alambre de diámetro aproximado a 900 nm. Para temperaturas de calcinado entre 700 o C y 900 o C se observó un cambio remarcable en la morfología con materiales disgregados conformados por partículas más pequeñas. Los análisis en microscopía electrónica en transmisión revelaron que los materiales tratados a la mayor temperatura están constituidos por pequeños cristales inferiores a 15 nm.Palabras clave: BaHfO 3 , BaZrO 3 , método poliol, perovskita, materiales nanoestructurados. ABSTRACTPerovskite materials (ABO 3 ) present considerable technological interest, their properties depend on the A and B elements. A variety of methods have been used for the elaboration of perovskite materials. In the present paper we present the results of the BaHfO 3 and BaZrO 3 obtained by polyol method. Inorganic salts of barium and hafnium or zirconium were dissolved in di-etilenglicol and the products were heat treated at 700 °C and 900 °C. X-ray diffraction revealed the cubic structure perovskite-type and diffractions corresponding to the secondary phases of BaCO 3 and MO 2 (M=Hf or Zr). The spectra obtained by FTIR show the presence of BaCO 3 . At 700 °C, the scanning electronic microscopy observations revealed a very compact morphology conformed by smaller sub-structures in the form of wire with a diameter around to 900 nm. At 900 °C it was observed a remarkable change in the morphology with dispersed materials conformed by small particles. Transmission electronic microscopy showed that the materials annealed at 900 °C are constituted by small crystals with size lower than 15 nm.

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Aging of Dielectric Dispersion in PLZT Relaxor Ceramics

Cited by 79 publications

References 3 publications

Aging in a Relaxor Ferroelectric: Scaling and Memory Effects

Aging in a Relaxor Ferroelectric: Scaling and Memory Effects

On the phase identity and its thermal evolution of lead free (Bi1/2Na1/2)TiO3-6 mol% BaTiO3

Síntesis en medio poli-alcohólico y caracterización de Perovskitas BaHfO3 y BaZrO3

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