Enhanced dielectric and piezoelectric properties of BNT-KNNG piezoelectric ceramics

Pattipaka, Srinivas; James, A. R.; Pamu, D.

doi:10.1016/j.jallcom.2018.06.138

Cited by 41 publications

(24 citation statements)

References 51 publications

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“…As a result, few elements such as Sr, Na, Nd, K etc., were doped to BIT. The obtained d 33 data werelisted in Table.3 [62][63][64][65][66][67][68][69][70][71]. It was clear from Table.3 that the d 33 of BIT based samples was observed to be changing from 17 to 650 pC/N.…”

Section: Bismuth Titanate Based Materials (Bitx)mentioning

confidence: 99%

A review on giant piezoelectric coefficient, materials and applications

2019

Biointerface Res Appl Chem

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Section: Bismuth Titanate Based Materials (Bitx)mentioning

confidence: 99%

A review on giant piezoelectric coefficient, materials and applications

2019

Biointerface Res Appl Chem

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“…The first peak indicates the phase transition from ferroelectric to anti-ferroelectric 18,19 and the second peak represents anti-ferroelectric to a paraelectric phase transition 20,21 . Also, the dielectric peak at T m is frequency dispersive which implies a diffuse character for the coarse and medium-grained samples.…”

Section: Dielectric Characterizationmentioning

confidence: 99%

High dielectric constant of (1-x)(Na0.5Bi0.5)TiO3-xBaTiO3 prepared by the hydrothermal method

Mesrar¹,

Lamcharfi²,

Echatoui³

et al. 2019

Mediterr.J.Chem.,

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In this study, hydrothermal synthesis conditions for the formation of (1-x (Na 0.5 Bi 0.5)TiO 3-xBaTiO 3 (x=0; 0.03; 0.05; 0.06; 0.07; 0.08 and 0.1) compounds were investigated. The process parameters such as the alkaline conditions and heating treatment (temperature, time) as well the influence of the (Na, Bi)/Ba ratio were investigated in detail. The as-prepared NBT powders were characterized by X-ray powder diffraction, scanning electron microscope (SEM) and dielectric measurements. Taking into account NBT behavior draws consideration to phenomena of the ion ordering, coexistence of various phase regions in a crystal lattice, phase transition diffusion and a considerably new phenomenon: the existence of a very high dielectric constant at low frequency. Our result presents a simple preparation route for low-cost and high-purity.

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“…It was firstly discovered by Smolenskii et al, is an ABO3 complex perovskite-structured material with random distribution of Bi +3 and Na + ions at A-site [17]. At room temperature (RT), it has a rhombohedral ferroelectric perovskite with R3c space group, which exhibits high Curie temperature (TC ~320 °C), high dielectric constant (εr) ~694 @1 kHz and low dielectric loss (tanδ) ~0.046, large remnant polarization (Pr) ~38 μC/cm 2 at high coercive field ~73 kV/cm resultant poor in piezoelectric coefficient (d33) ~80 pC/N because of polling difficulties [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…a) shows the Raman spectra of BNT films deposited on a quartz substrate at different O2 pressures measured from 50 -1200 cm -1 . BNT has 13 Raman active modes based on group theory: ΓRaman = 4A1 + 9E, where A1 and E modes are Raman and IR active[19]. The whole BNT Raman spectra can be categorised into four frequency regions (A, B, C and D) are shown inFigure 4(a).…”

mentioning

confidence: 99%

Investigation of Surface Scaling, Optical and Microwave Dielectric Studies of Bi0.5Na0.5TiO3 thin Films

Pattipaka

Pamu

Goud

et al. 2021

Preprint

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Herein, we have investigated the optical and microwave dielectric properties of Bi 0.5 Na 0.5 TiO 3 (BNT) thin films grown under different oxygen pressure ( P O2 ) using pulsed laser deposition (PLD) technique. The X-ray diffraction measurements confirms the single phase of BNT along with secondary phase and further reduction in secondary phase and increase in BNT phase with P O2 , signifies the close relation between the crystal structure and oxygen content. The shift of Raman-active TO1, TO2 and TO3 modes towards higher wavelengths and increase in mode intensity with P O2 indicating the films degree of crystallinity. The local roughness ( α loc ) of all films obtained as ~ 0.85, and the interface width ( w ) and lateral correlation length ( ξ ) of films varies with P O2 . Also, the films exhibit the increase in refractive index and reduction in optical bandgap of due to improvement in crystallinity and reduction in the oxygen vacancies. The microwave dielectric properties show a strong P O2 depends with higher dielectric constant ( ε r = 336) with lower loss (tan δ = 0.0093) at 5 GHz which show the potential applications in high frequency devices.

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Enhanced dielectric and piezoelectric properties of BNT-KNNG piezoelectric ceramics

Cited by 41 publications

References 51 publications

A review on giant piezoelectric coefficient, materials and applications

A review on giant piezoelectric coefficient, materials and applications

High dielectric constant of (1-x)(Na0.5Bi0.5)TiO3-xBaTiO3 prepared by the hydrothermal method

Investigation of Surface Scaling, Optical and Microwave Dielectric Studies of Bi0.5Na0.5TiO3 thin Films

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