Dielectric and ferroelectric properties of (1-x)PMN-(x)PT synthesized by co-precipitation method

Tarale, A. N.; Premkumar, S.; Reddy, ‬V. Raghavendra; Salunkhe, D. J.; Mathe, V. L.

doi:10.1080/00150193.2017.1362236

Cited by 11 publications

(2 citation statements)

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“…The maximum value of ε r observed is 971 at 1kHz frequency. This is greater than that observed by Rao and sankarum 24 ,Weda eta l. 34 for KBT ceramics but this obtained value is much lower than that observed by Yimnirun 33 , Guha 35 and Park and Shrout 36 for PMN ceramic and this value also lower than that observed by Cao 37 and Yimnirun 33 for PMN-33%PT and 0.7PMN-0.3PZT respectively.With increasing KBT content, the maximum transition temperature (T m ) shifts from 75 o c monotonously to higher temperatures at 319 o c and the maximum dielectric constant (ε m ) value significantly rises after adding more KBT, which may be attributed to microstructure and density of material 38 .This behavior is similar to PMN-PT 39 , PMN-BNT 18 and PZT-PMN 38 . & 1MHz for (a) 0.85PMN-0.15KBT, (b) 0.75PMN -0.25KBT,(c) 0.65PMN-0…”

Section: Figure1 Xrd Pattern Of (1-x) Pmn-(x)kbt Ceramicsmentioning

confidence: 69%

“…. temperature at 1kHz, 400kHz, and 1MHz for (a) 0.85PMN-0.15KBT,(b) 0.75PMN-0.25KBT, (c) ,it is observed that tanα passes through a peak just below temperature T m , which appears to be a common behavior for ferroelectric systems 39 . For temperature T>T m , tanα possess minimum values and remains almost constant with further increase in temperature.…”

Section: 35kbtmentioning

confidence: 84%

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Phase development and dielectric responses in PMNKBT solid solutions

Legesse¹,

Rao²

2019

IJCTR

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(1-x)PbMg1 /3 Nb 2/3 O 3 (PMN)-(x)K 0.5 Bi 0.5 TiO 3 (KBT)) materials(with x = 0.15,0.25 and 0.35) were prepared by double sintering conventional mixed-oxide method. X-ray powder diffraction patterns reveal that the crystal structure of PMN-KBT crystal changes from cubic to tetragonal symmetry with increasing amounts of KBT(x). The dielectric and ferroelectric properties of PMN-KBT crystals with different compositions near the morphotropic phase boundary (MPB) were studied systematically. The dielectric constant and dielectric loss tangent were measured as a function of both temperature and frequency from impedance data. With increasing KBT content, the frequency dependence of the transition temperature and the diffuseness of phase transition is observed in dielectric peak for sintered specimens. Highphase transition temperature (T m) of 319•C was obtained at 1 kHz for the composition x = 0.35. The diffuse phase transition(DPT) of the samples were assessed and the broadest dielectric peak occurs at x = 0.35, with diffusivity value  = 1.86, which leads to a morphotropic phase boundary in this system. In order to study ferroelectric property of (1-x) PMN-(x)KBT ceramics, polarization vs. electric field (P-E) hysteresis loops were traced at room temperature under different applied field. It is observed that the loop area is increased as the applied voltage has increased. The remnant polarization (P r)and coercive field (E C) are also increased as the applied voltage is increased.

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