Diffuse phase transition in lead zinc niobate

Kuwata, Jun; Uchino, Kenji; Nomura, Shōichiro

doi:10.1080/00150197908239443

Cited by 159 publications

(60 citation statements)

References 3 publications

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“…Diffuse maximum of ε′ is the characteristic of relaxor ferroelectric [10,11]. This feature in the ε′-T curve is very much similar to the observations by Cross, Yokosuka and many other researchers [11][12][13] for various lead based relaxors. It is well known that the dielectric permittivity of normal ferroelectric above Curie temperature follows the Curie-Weiss law described by,…”

Section: Resultssupporting

confidence: 76%

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Ferroelectric relaxor behaviour in Pb(Fe0.5Ta0.5)O3

2009

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:The relaxor ferroelectric lead iron tantalate, Pb(Fe 0.5 Ta 0.5 )O 3 (PFT) is synthesized by Coulombite precursor method. The X-ray diffraction pattern of the sample at room temperature shows a cubic phase. The field dependence of dielectric response is measured in a frequency range 0.1 kHz -1 MHz and in a temperature range from 173-373 K. The temperature dependence of permittivity (ε ′) shows broad maxima at various frequencies. The frequency dependence of the permittivity maximum temperature (T m ) has been modelled using Vogel-Fulcher relation.

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Section: Resultssupporting

confidence: 76%

“…For such behaviour, a modified Curie-Weiss law has been proposed by Uchino and Nomura [13] to describe the diffuseness of the ε′ at and around T m , given as…”

Section: Resultsmentioning

confidence: 99%

Ferroelectric relaxor behaviour in Pb(Fe0.5Ta0.5)O3

2009

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“…The low BDS and W rec of AFE and FE ceramics limit their application for high-voltage equipment and compact electronic devices. [7][8][9][10] So, it is important to search for the materials with a high BDS and W rec to enable the increasing demands for more compact electronic and energy storage devices.…”

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confidence: 99%

Enhanced energy storage density by inducing defect dipoles in lead free relaxor ferroelectric BaTiO3-based ceramics

Zhou

Pang

2017

Applied Physics Letters

148

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In this work, Mn-doped 0.9BaTiO3-0.1Bi(Mg2/3Nb1/3)O3 ceramics were prepared by the conventional solid state reaction method, and the effect of defect dipoles on energy storage properties of lead free relaxor ferroelectric BaTiO3-based ceramics was studied. The crystal structure, dielectric properties, and energy storage properties were explored in detail. It was found that polarization hysteresis (P-E) loops of 0.9BaTiO3-0.1Bi(Mg2/3Nb1/3)O3-x wt. % MnCO3 (0.2–0.5) ceramics took on high maximum polarization (Pmax) and low remanent polarization (Pr). Meanwhile, recoverable energy density (Wrec) and energy conversion efficiency (η) were obviously enhanced by inducing defect dipoles into BaTiO3-Bi(Mg2/3Nb1/3)O3 relaxor ferroelectrics. The 0.9BaTiO3-0.1Bi(Mg2/3Nb1/3)O3-0.3 wt. % MnCO3 ceramic was found to exhibit good energy storage properties with a Wrec of about 1.70 J/cm3 and a η ∼ 90% under an electric field of 210 kV/cm. The breakdown electric field and Wrec of BaTiO3-based materials were significantly increased in the present work, and they might be good candidates for high power energy storage applications.

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“…7 Pb͑Zn 1/3 Nb 2/3 ͒O 3 ͑PZN͒ is one of typical relaxors exhibiting a diffuse ferroelectric phase transition into a rhombohedral symmetry at ϳ413 K. 8 As the Ti concentration increases towards the morphotrophic phase boundary ͑MPB͒ at x ϳ 9%, PZN-xPT shows a different phase sequence upon cooling. The phase diagram of PZN -xPT for 0 ഛ x ഛ 9% is under intense study for a better understanding of complex structural and dynamical behaviors of these compounds.…”

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confidence: 99%

Hysteresis in acoustic properties of ferroelectric relaxor Pb[(Zn1∕3Nb2∕3)0.955Ti0.045]O3 single crystals studied by Brillouin and dielectric spectroscopies

Kim

Kojima

et al. 2006

Journal of Applied Physics

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Acoustic and dielectric properties of Pb͓͑Zn 1/3 Nb 2/3 ͒ 1−x Ti x ͔O 3 ͑PZN-xPT͒ single crystals with x = 0.045 have been studied by the high-resolution micro-Brillouin scattering and dielectric spectroscopy in a wide temperature range. The softening of the Brillouin shift and the increase of dielectric relaxation time upon cooling indicated the formation of polar nanoregions ͑PNRs͒ and the slowing down of their dynamics. In contrast to the acoustic properties of typical model relaxors such as lead magnesioniobate, the change in the Brillouin shift near its minimum became sharper on heating compared to the change on cooling, pointing to the clear existence of hysteresis in the dynamics of the diffuse phase transition in PZN-4.5%PT. Since the number of PNRs will increase upon cooling, it may be expected that the kinetics of the phase transition would become slower, the lower the transition temperature resulting in the more sluggish, broad feature of the Brillouin shift observed during cooling. This result may indicate that the number and size of polar nanoregions, which are dependent on temperature, play an important role in the development of the mesoscopic ferroelectric order in PZN-4.5%PT.

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Diffuse phase transition in lead zinc niobate

Cited by 159 publications

References 3 publications

Ferroelectric relaxor behaviour in Pb(Fe0.5Ta0.5)O3

Ferroelectric relaxor behaviour in Pb(Fe0.5Ta0.5)O3

Enhanced energy storage density by inducing defect dipoles in lead free relaxor ferroelectric BaTiO3-based ceramics

Hysteresis in acoustic properties of ferroelectric relaxor Pb[(Zn1∕3Nb2∕3)0.955Ti0.045]O3 single crystals studied by Brillouin and dielectric spectroscopies

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