The crossover from a ferroelectric to a relaxor state in lead-free solid solutions

2004 ◽  
Vol 16 (6) ◽  
pp. 963-970 ◽  
Author(s):  
Annie Simon ◽  
Jean Ravez ◽  
Mario Maglione
Keyword(s):  
Solid Solutions ◽  
Lead Free ◽  
Relaxor State

scholarly journals First-principles study on structural, electronic and optical properties of perovskite solid solutions KB1−xMgxI3 (B = Ge, Sn) toward water splitting photocatalysis

RSC Advances ◽  
2021 ◽  
Vol 11 (42) ◽  
pp. 26432-26443
Author(s):  
Chol-Hyok Ri ◽  
Yun-Sim Kim ◽  
Un-Gi Jong ◽  
Yun-Hyok Kye ◽  
Se-Hun Ryang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Water Splitting ◽  
Potassium Iodide ◽  
Solid Solutions ◽  
First Principles ◽  
Lead Free ◽  
First Principles Calculations ◽  
Electronic And Optical Properties ◽  
First Principles Study

We propose lead-free potassium iodide perovskite solid solutions KBI3 with B-site mixing between Ge/Sn and Mg as potential candidates for photocatalysts based on systematic first-principles calculations.

Local structure and piezoelectric instability in lead-free (1 − x)BaTiO3-xA(Cu1/3Nb2/3)O3(A = Sr, Ca, Ba) solid solutions

RSC Advances ◽  
2014 ◽  
Vol 4 (3) ◽  
pp. 1283-1292 ◽  
Author(s):  
Deepam Maurya ◽  
Ashok Kumar ◽  
Valeri Petkov ◽  
James E. Mahaney ◽  
Ram S. Katiyar ◽  
...  
Keyword(s):  
Solid Solutions ◽  
Local Structure ◽  
Lead Free

Description of Relaxor State in Na1/2Bi1/2TiO3-SrTiO3-PbTiO3 System of Solid Solutions

2011 ◽  
Vol 123 (1) ◽  
pp. 40-46 ◽  
Author(s):  
M. Dunce ◽  
E. Birks ◽  
M. Antonova ◽  
M. Kundzinsh
Keyword(s):  
Solid Solutions ◽  
Relaxor State

Microstructure and Properties of Lead-Free Perovskite Ceramics on the Base of KNN Perovskite

2020 ◽  
Vol 27 ◽  
pp. 90-98
Author(s):  
E.D. Politova ◽  
G.M. Kaleva ◽  
Alexander V. Mosunov ◽  
N.V. Sadovskaya ◽  
Dmitry A. Kiselev ◽  
...  
Keyword(s):  
Solid Solutions ◽  
Piezoelectric Coefficient ◽  
Piezoelectric Properties ◽  
Unit Cell ◽  
Lead Free ◽  
Unit Cell Parameters ◽  
Ionic Radii ◽  
Cell Parameters ◽  
Microstructure And Properties ◽  
Perovskite Ceramics

The influence of LiSbO3 on the structure, microstructure, dielectric, ferroelectric and local piezoelectric properties of (K0.5Na0.5)NbO3 ceramics has been studied. Changes in unit cell parameters correlated with ionic radii changes and high effective local d33 piezoelectric coefficient values were observed depending on solid solutions compositions.

scholarly journals Ferroelectric and Piezoelectric Properties of Lead-Free BCT-xBZT Solid Solutions

2015 ◽  
Vol 56 (9) ◽  
pp. 1370-1373 ◽  
Author(s):  
Dang Anh Tuan ◽  
Nguyen Trong Tinh ◽  
Vo Thanh Tung ◽  
Truong Van Chuong
Keyword(s):  
Solid Solutions ◽  
Piezoelectric Properties ◽  
Lead Free ◽  
Ferroelectric And Piezoelectric Properties

scholarly journals Large electro-strain signal of the BNT–BT–KNN lead-free piezoelectric ceramics with CuO doping

2019 ◽  
Vol 09 (03) ◽  
pp. 1950022 ◽  
Author(s):  
Zhi-Hao Zhao ◽  
Rui-Fang Ge ◽  
Yejing Dai
Keyword(s):  
Transition Temperature ◽  
Solid State ◽  
Room Temperature ◽  
Ferroelectric Phase ◽  
Piezoelectric Properties ◽  
The Other ◽  
Lead Free ◽  
State Process ◽  
Relaxor State ◽  
Strain Signal

This paper investigates a system of 0.93[Formula: see text][Formula: see text]TiO3–0.06BaTiO3–0.01[Formula: see text][Formula: see text]NbO3–[Formula: see text]CuO (BNT–BT–KNN–[Formula: see text]CuO, [Formula: see text][Formula: see text]mol.%) ceramics, which were fabricated by the conventional solid-state process through the granulation of vacuum freeze drier. The results show that the CuO doping made a significant enhancement on the piezoelectric properties of the BNT–BT–KNN ceramics. With the doping of CuO, the transition temperature between ferroelectric phase and ergodic relaxor state is reduced to near room temperature, resulting in pinched [Formula: see text]–[Formula: see text] loops and “sprout” shape [Formula: see text]–[Formula: see text] curves. For the composition with [Formula: see text], a high unipolar strain of 0.39% under 5[Formula: see text]kV/mm contributes a large [Formula: see text][Formula: see text]pm/V at room temperature, which is competitive with the other BNT-based ceramics.

Understanding the A and B-site engineered Lead-Free Ba(1-x)CaxZryTi(1−y)O3 piezoceramics : A perspective from DFT

2021 ◽  
Author(s):  
S Premkumar ◽  
S Radhakrishnan ◽  
Vikas Laxman Mathe
Keyword(s):  
Density Functional Theory ◽  
Solid Solutions ◽  
Density Functional ◽  
Lead Free ◽  
Functional Theory

Density functional theory was used to investigate the structure and polarization of lead-free piezoelectric, Ba(1-x)CaxZryTi(1−y)O3, perovskite solid solutions namely BaTiO3 (BT), Ba(Zr0.125Ti0.875)O3 (BZT), (Ba0.875Ca0.125)TiO3 (BCT) and Ba0.875Ca0.125(Zr0.125Ti0.875)O3 (BCZT). Here we...

Na1-xKxNbO3 (x=0.2~0.8) Lead-Free Piezoelectric Ceramics Prepared by Spark Plasma Sintering

2007 ◽  
Vol 336-338 ◽  
pp. 224-227
Author(s):  
Ke Wang ◽  
Bo Ping Zhang ◽  
Jing Feng Li ◽  
Hong Jin Liu
Keyword(s):  
Spark Plasma Sintering ◽  
Solid Solutions ◽  
Electromechanical Coupling ◽  
Composition Range ◽  
Lead Free ◽  
Electromechanical Coupling Coefficient ◽  
Maximum Value ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Planar Mode

Highly dense Na1-xKxNbO3 (x=0.2~0.8) ceramics were successfully prepared using spark plasma sintering (SPS) at temperature as low as 920°C. Solid solutions were formed during the composition range investigated. The piezoelectric constant and planar mode electromechanical coupling coefficient are significantly dependent on the Na/K ratio, with the maximum value of 148 pC/N and 38.9% at the composition Na0.5K0.5NbO3.

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