Structure and electrical properties of Ca2+-doped (Na0.47Bi0.47Ba0.06)TiO3 lead-free piezoelectric ceramics

Lian, Han‐li; Shao, Xiao-jing; Chen, Xiao‐Ming

doi:10.1016/j.ceramint.2018.03.180

Cited by 13 publications

(9 citation statements)

References 38 publications

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“…Therefore, the long-range grain conduction mechanism plays a dominant role in the relaxation behavior of the BNKTBZ-2FN ceramic. The activation energy (E a ) in the BNKTBZ-xFN ceramics is obtained by the Arrhenius equation [40]:…”

Section: Resultsmentioning

confidence: 99%

Enhanced recoverable energy density of 0.94Bi0.50(Na0.78K0.22)0.50Ti1−x(Fe0.50Nb0.50)xO3–0.06BaZrO3 lead-free relaxor ceramics doped by (Fe0.50Nb0.50)4+ complex ions

Wang

Yadav

et al. 2020

SN Appl. Sci.

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The innovative 0.94Bi 0.50 (Na 0.78 K 0.22) 0.50 Ti 1−x (Fe 0.50 Nb 0.50) x O 3-0.06BaZrO 3 (BNKTBZ-xFN) lead-free relaxor ceramics were designed and fabricated by the conventional solid-state technique. The dielectric, ferroelectric, energy storage, and impedance performance of these ceramics were investigated systematically. XRD patterns revealed that the (Fe 0.50 Nb 0.50) 4+ complex ions had completely dissolved in the lattice and constructed a single solid-solution. The addition of (Fe 0.50 Nb 0.50) 4+ complex ions had an obvious impact on the grain size and crystallinity of BNKTBZ-xFN ceramics, which led to a large dielectric breakdown strength. In addition, the degree of diffusivity (γ) for BNKTBZ-xFN ceramics were increased from ~ 1.72 to ~ 1.93, indicating an enhanced relaxor behavior with the doping of (Fe 0.50 Nb 0.50) 4+ complex ions. The highest recoverable energy density (W rec) ~ 1.20 J/cm 3 and energy-storage efficiency (η) ~ 72% were attained at 120 kV/cm for BNKTBZ-2FN ceramic with the excellent fatigue resistance. Therefore, the BNKTBZ-2FN ceramic might be a promising candidate for energy-storage electronic devices.

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Section: Resultsmentioning

confidence: 99%

Enhanced recoverable energy density of 0.94Bi0.50(Na0.78K0.22)0.50Ti1−x(Fe0.50Nb0.50)xO3–0.06BaZrO3 lead-free relaxor ceramics doped by (Fe0.50Nb0.50)4+ complex ions

Wang

Yadav

et al. 2020

SN Appl. Sci.

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“…The corresponding tan δ values are 0.31, 0.05, 0.04, and 0.04, respectively. With an increase in the mass ratio between Powder I and Powder II, ɛ r of the ceramics increases, which is related to the changes of relative density and grain size of the ceramics 4,36 . Dense structure and large grains contribute to an increase of ɛ r .…”

Section: Resultsmentioning

confidence: 99%

BN6BT ceramics via cold‐sintering with annealing: Effects of grain size of precursor powders and annealing temperature

Lian,

He,

Liang

et al. 2023

J Am Ceram Soc.

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In this work, (Bi0.5Na0.5)0.94Ba0.06TiO3 (BN6BT) lead‐free ceramics were prepared via cold‐sintering followed by annealing, and effects of grain size of precursor powders and annealing temperature on microstructure, dielectric, and ferroelectric properties of the ceramics were studied. The precursor powders for cold sintering were obtained by mixing the powders with sub‐micrometer (average grain size, AGS = 0.26 μm) and nanometer (AGS = 73 nm) grains in various mass ratios (1:0, 1:1, 1:2, and 1:4). The precursor powders were mixed with deionized water and cold sintered at 180°C for 1 h under 500 MPa. The cold‐sintered samples were then annealed at temperatures between 800 and 1000°C for 2 h. For the ratios of 1:2 and 1:4, the corresponding ceramics annealed at 950°C exhibit dielectric and ferroelectric properties similar to those of the BN6BT ceramics sintered at 1170°C via the solid‐state sintering method. The present BN6BT ceramics exhibit dense microstructure with finer grains with AGS = 280 nm, higher breakdown strength (BDS = 160 kV· cm−1) compared to the solid‐state sintered BN6BT ceramics with AGS = 1.6 μm and BDS = 75 kV· cm−1. The results demonstrate that the cold‐sintering followed by annealing is effective in preparing BN6BT ceramics with fine grains and excellent dielectric and ferroelectric properties at relatively low temperatures.

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“…Bu yüzden, uzun yıllardır (Bi 0,5 Na 0,5 )TiO 3 (BNT) ve (K 0,5 Na 0,5 )NbO 3 (KNN) bazlı çok sayıda kurşunsuz piezoelektrik (aynı zamanda ferroelektrik) malzeme bileşimleri geliştirilmiştir [5,6]. Bu malzemeler arasında, morfotropik faz sınırına sahip 0,94(Bi 0,5 Na 0,5 )TiO 3 -0,06BaTiO 3 (BNT-6BT) katı çözeltisinin piezoelektrik uygulamalar için umut vadeden bir potansiyele sahip olduğu düşünülmektedir [4,[7][8][9].…”

Section: Synthesis and Properties Of Domestic Boron Doped Bnt-bt Lead...unclassified

“…Kutuplama işlemi ile bu polar malzemeler bünyelerindeki rastgele yönlenmiş dipollerin elektrik alan yönünde yönlendirilmesi sayesinde en üstün piezoelektrik özelliklerini kazanırlar [11,12]. Ancak toksik özellikli kurşun içeren PZT seramiklere alternatif olarak geliştirilen çevreye dost BNT esaslı kurşunsuz piezoelektrik malzemelerde yüksek koersif alan (E C =73 kV/cm), yüksek dielektrik kayıp (tanδ) ve yüksek iletkenlik özelliklerinden kaynaklı kutuplama zorluğu uygulamalar açısından sorun oluşturmaktadır [4,8,9]. Bu problemlerin nedenlerinden biri olarak alkali metallerin (Bi +3 , Na +1 , K +1 gibi) yüksek sıcaklıktaki uçuculuğunun stokiyometriyi bozması gösterilebilir.…”

Section: Synthesis and Properties Of Domestic Boron Doped Bnt-bt Lead...unclassified

Synthesis and properties of domestic boron doped BNT-BT lead-free piezoelectric ceramics

2022

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Bu çalışmada, yerli bor (B2O3) hammaddesi kullanılarak katı-hal reaksiyonu ile molce %1 B+3 katkılı 0,94(Bi0,5Na0,5)TiO3-0,06BaTiO3 (BNT-6BT) seramikler üretilmiştir. Kalsinasyon sonrası faz oluşumu X-ışını kırınımı (XRD) ile belirlenen tozlardan hidrolik pres (ön şekillendirme) ve soğuk izostatik presleme (CIP) ile disk şeklinde numuneler hazırlamıştır. Numuneler bağlayıcı giderme işleminin ardından 1100, 1150 ve 1200°C sıcaklıklarda 12 saat süreyle hava ortamında sinterlenmiştir. Yapı ve özelliklerin karakterizasyonundan önce numunelerin yoğunluk ölçümleri Arşimet yöntemiyle gerçekleştirilmiştir. Taramalı elektron mikroskobu (SEM) ile mikroyapı incelemesi ve elektriksel ölçümler için numuneler altın (Au) kaplanmıştır. Bu çalışmada üretilen numunelerin dielektrik (εr, tanδ), piezoelektrik (d33) ve ferroelektrik (P-E histeresiz döngüsü) özellik ölçümlerinden elde edilen sonuçlar literatürde yer alan katkısız ve ticari B2O3 katkılı BNT-6BT seramikler üzerine yapılmış olan çalışmalarla karşılaştırılmıştır. Sonuçlar yerli borun piezoelektrik malzemelerin üretiminde özellikleri geliştirici katkı olarak kullanılabilirliğini göstermektedir.

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Structure and electrical properties of Ca2+-doped (Na0.47Bi0.47Ba0.06)TiO3 lead-free piezoelectric ceramics

Cited by 13 publications

References 38 publications

Enhanced recoverable energy density of 0.94Bi0.50(Na0.78K0.22)0.50Ti1−x(Fe0.50Nb0.50)xO3–0.06BaZrO3 lead-free relaxor ceramics doped by (Fe0.50Nb0.50)4+ complex ions

Enhanced recoverable energy density of 0.94Bi0.50(Na0.78K0.22)0.50Ti1−x(Fe0.50Nb0.50)xO3–0.06BaZrO3 lead-free relaxor ceramics doped by (Fe0.50Nb0.50)4+ complex ions

BN6BT ceramics via cold‐sintering with annealing: Effects of grain size of precursor powders and annealing temperature

Synthesis and properties of domestic boron doped BNT-BT lead-free piezoelectric ceramics

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