Bi(Mg0.5Ti0.5)O3-doped NaNbO3 ferroelectric ceramics: Linear regulation of Curie temperature and ultra-high thermally stable dielectric response

2019 ◽  
Vol 45 (17) ◽  
pp. 21175-21182 ◽  
Author(s):  
Ruiyi Jing ◽  
Li Jin ◽  
Ye Tian ◽  
Yunyao Huang ◽  
Yu Lan ◽  
...  
Keyword(s):  
Curie Temperature ◽  
Dielectric Response ◽  
Ferroelectric Ceramics ◽  
Thermally Stable

scholarly journals Enhanced energy storage performance and fatigue resistance of Mn-doped 0.7Na0.5Bi0.5TiO3–0.3Sr0.7Bi0.2TiO3 lead-free ferroelectric ceramics

2020 ◽  
pp. 1-10
Author(s):  
Jinbo Wang ◽  
Huiqing Fan
Keyword(s):  
Energy Storage ◽  
Fatigue Resistance ◽  
Dielectric Response ◽  
Lead Free ◽  
Ferroelectric Ceramics ◽  
Relaxor Behavior ◽  
Storage Performance ◽  
Energy Storage Properties ◽  
Mn Doped ◽  
Storage Properties

The validity of Mn element on enhanced energy storage performance and fatigue resistance of Mn-doped 0.7Na0.5Bi0.5TiO3–0.3Sr0.7Bi0.2TiO3 lead-free ferroelectric ceramics (BNT–BST–xMn) is certified by doping. The effects of Mn modification on the dielectric behavior, ferroelectric, energy storage properties, and AC impedance are comprehensively investigated. It is found that the average grain size of the ceramics modified by Mn additions is reduced slightly. Moreover, the relaxor properties are evidently enhanced with the increased Mn content. The AC impedance spectra can even better clarify the dielectric response and relaxor behavior. The results suggest that both of the dielectric response and relaxor behavior are determined by defects especially concentration of the oxygen vacancy. The superior energy storage properties are realized at x = 0.05 with an energy storage density (Wrec) of 1.33 J/cm3 as well as energy storage efficiency (η) of 86.2% at 100 kV/cm, accompanied with a superior thermal stability. BNT–BST–5Mn ceramics can maintain a stable energy storage performance within 106 fatigue cycles, indicating an excellent fatigue resistance.

Thermally stable electrostrains and composition-dependent electrostrictive coefficient Q33 in lead-free ferroelectric ceramics

2019 ◽  
Vol 45 (17) ◽  
pp. 22854-22861 ◽  
Author(s):  
Li Jin ◽  
Jing Pang ◽  
Yongping Pu ◽  
Ning Xu ◽  
Ye Tian ◽  
...  
Keyword(s):  
Lead Free ◽  
Ferroelectric Ceramics ◽  
Thermally Stable

Effect of W Substitution in Strontium Bismuth Tantalate Ferroelectric Ceramics: Enhanced Ferroelectric Properties

2010 ◽  
Vol 1250 ◽  
Author(s):  
Indrani Coondoo ◽  
Neearj Panwar ◽  
Ashok Biradar ◽  
Arun Jha
Keyword(s):  
Curie Temperature ◽  
Oxygen Vacancies ◽  
Ferroelectric Properties ◽  
Solid State Reaction Method ◽  
Ferroelectric Ceramics ◽  
Low Loss ◽  
Strontium Bismuth Tantalate ◽  
Reaction Method ◽  
Pristine Sample ◽  
Ferroelectric Memory

AbstractTungsten (W)-substituted SBT ceramics [SrBi2(Ta1-xWx)2O9; 0.0 ≤ x ≤ 0.20] were synthesized by solid state reaction method using different sintering temperatures (1100 οC, 1150 οC, 1200 οC and 1250 οC). W substitution is found to significantly affect the electrical properties of SBT, including dielectric permittivity, Curie temperature, and ferroelectricity. Dielectric constant (εr) and the Curie temperature (Tc) increase with increasing W content. The dielectric loss reduces significantly with increase in W concentration. The maximum Tc of ~ 390 οC is observed in the sample with x = 0.20 as compared to ~ 320 οC for the pure sample when sintered at 1200 οC. The peak ε increases from ~ 270 in the sample with x = 0.0 to ~ 700 for the composition with x = 0.20, when sintered at 1200 οC. All the tungsten-substituted ceramics have higher 2Pr than that in the pristine sample. The maximum 2Pr (~25 μC/cm2) is obtained in composition with x = 0.05 sintered at 1200 οC. These effects have been interpreted based on the model of the recovery of oxygen vacancies upon W substitution. Such compositions with low loss and high Pr values should be excellent materials for highly stable ferroelectric memory devices.

Features of dielectric response in PMN–PT ferroelectric ceramics

2008 ◽  
Vol 41 (22) ◽  
pp. 225504 ◽  
Author(s):  
J D S Guerra ◽  
E B Araújo ◽  
C A Guarany ◽  
R N Reis ◽  
E C Lima
Keyword(s):  
Dielectric Response ◽  
Ferroelectric Ceramics

Dielectric Properties of (Bi1/2Na1/2)TiO3-SrTiO3 Ferroelectric Ceramics

2007 ◽  
Vol 336-338 ◽  
pp. 49-50
Author(s):  
Chao Liu ◽  
Yuan Fang Qu ◽  
Feng Long Han ◽  
Yuan Liang Li ◽  
Xiao Yan Li
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Curie Temperature ◽  
Ferroelectric Properties ◽  
Dielectric Constants ◽  
Ferroelectric Ceramics

Ferroelectric properties of (Bi1/2Na1/2) TiO3-SrTiO3 were studied. The dielectric properties were measured at 1KHz. It was found that the dielectric constants are improved with the increase of additive amount of BNT. If the amount continues increasing, the properties become worse, the optimum dielectric constant of the samples can reach 4300. When the proportion of (Bi1/2Na1/2)TiO3: SrTiO3 is 65:35, with the increase of additive amount of MnCO3, the Curie temperature descends obviously. The dielectric constant increased at beginning and dropped sharply when the amount of MnCO3 exceeds 1.1wt%.

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