Crystal Growth and Electrical Properties of Na0.5Bi0.5TiO3-BaTiO3 Lead-Free Ferroelectric Piezocrystals

2009 ◽  
Vol 421-422 ◽  
pp. 17-20
Author(s):  
Chao Chen ◽  
Xiang Yong Zhao ◽  
Hong Liu ◽  
Wen Wei Ge ◽  
Hao Su Luo ◽  
...  
Keyword(s):  
Solid Solution ◽  
Crystal Growth ◽  
Electrical Properties ◽  
Crystal Orientation ◽  
Ferroelectric Properties ◽  
Lead Free ◽  
Depolarization Temperature ◽  
Dielectric Maximum ◽  
Top Seeded Solution Growth ◽  
Piezoelectric Performance

(1-x)(Na0.5Bi0.5)TiO3-xBaTiO3 (abbreviated as NBBT100(1-x)/100x or NBBT100x) solid solution single crystals with x=0, 0.06, 0.08, 0.10, 0.20, 1.0 were grown using top-seeded solution growth (TSSG) method. Dielectric, piezoelectric and ferroelectric properties of NBBT crystals were investigated as a function of temperature, frequency, composition and crystal orientation. The temperature (Tm) corresponding to dielectric maximum and the depolarization temperature (Td) decrease with increasing x. The <001> oriented NBBT90/10 single crystal shows excellent piezoelectric performance with piezoelectric constant (d33) value about 275pC/N and exhibits relatively smaller coercive field (Ec) of 2.49 kV/mm and dielectric loss tanδ of 2.9 %, indicating a more adaptive engineered domain structure.

Multiferroic properties of Bi0.5K0.5TiO3–BiFe1−xCoxO3 (0 ≤ x ≤ 0.2) solid solution

RSC Advances ◽  
2015 ◽  
Vol 5 (126) ◽  
pp. 104210-104215 ◽  
Author(s):  
X. Z. Zuo ◽  
J. Yang ◽  
B. Yuan ◽  
X. C. Kan ◽  
Lin Zu ◽  
...  
Keyword(s):  
Solid Solution ◽  
Pechini Method ◽  
Ferroelectric Properties ◽  
Lead Free ◽  
Multiferroic Properties ◽  
Modified Pechini Method

We have successfully prepared a binary lead-free solid-solution of Bi0.5K0.5TiO3–BiFe1−xCoxO3 using a modified Pechini method and investigated the magnetic and ferroelectric properties of Bi0.5K0.5TiO3–BiFe1−xCoxO3 (0 ≤ x ≤ 0.2).

Effect of Bi2O3 Addition on the Microstructure and Electrical Properties of Lead-Free (Na0.5K0.5)NbO3-Bi0.5(Na0.93K0.07)0.5TiO3 Ceramics

2013 ◽  
Vol 479-480 ◽  
pp. 3-7
Author(s):  
Chun Huy Wang
Keyword(s):  
Solid Solution ◽  
Electrical Properties ◽  
Electromechanical Coupling ◽  
Piezoelectric Properties ◽  
Lead Free ◽  
Coupling Coefficients ◽  
Electromechanical Transducer ◽  
Lead Free Ceramics ◽  
Thickness Mode ◽  
Planar Mode

In the present study, various quantities of Bi2O3were added into 0.98(Na0.5K0.5)NbO3-0.02Bi(Na0.93K0.07)TiO3(0.98NKN-0.02BNKT) ceramics. It was found that 0.98NKN-0.02BNKTwith the addition of 0~0.5 wt.% Bi2O3exhibit relatively good piezoelectric properties. For 0.98NKN-0.02BNKT ceramics, the electromechanical coupling coefficients of the planar modekpand the thickness modektreach 0.40 and 0.47,respectively. For 0.98NKN-0.02BNKT ceramics with the addition of 0.3 wt.% Bi2O3, the electromechanical coupling coefficients ofthe planar modekpand the thickness modektreach 0.50 and 0.53, respectively. It is obvious that 0.98NKN-0.02BNKT solid solution ceramics by adding low quantities of Bi2O3is one of the promising lead-free ceramics for electromechanical transducer applications.

scholarly journals The (1-x)BiFeO3-xBaTiO3-Bi(Zn0.5Ti0.5)O3 high temperature lead-free piezoelectric ceramics with strong piezoelectric properties

2021 ◽  
Author(s):  
Yuanyuan Sun ◽  
Huabin Yang ◽  
Jiwen Xu ◽  
Weiran Huang ◽  
Minhong Jiang ◽  
...  
Keyword(s):  
High Temperature ◽  
Curie Temperature ◽  
Piezoelectric Properties ◽  
Ferroelectric Properties ◽  
Temperature Fields ◽  
Depolarization Temperature ◽  
Ceramic Structure ◽  
Low Dielectric ◽  
Tan Δ ◽  
Piezoelectric Performance

Abstract The structure, microstructure, piezoelectric properties, ferroelectric properties and Curie temperature of (1- x )BiFeO 3 - x BaTiO 3 -Bi(Zn 0.5 Ti 0.5 )O 3 +MnO 2 +Li 2 CO 3 ceramics were investigated experimentally by improved solid-state reaction approach. The crystalline structures were examined by X-ray diffractometry. When x = 0.3, the rhombohedral and pseudocubic phases coexist in the ceramic structure. It is considered that the morphotropic phase boundary was formed here. At the same time, the piezoelectric performance d 33 , Curie temperature T C , and depolarization temperature are as high as 184 pC/N, 550°C, 530°C at x = 0.3, respectively. It is worth noting that when x = 0.24, the ceramics have a high T C = 580°C and low dielectric loss tan δ = 1.9%. These results show that the BFBT-BZT system ceramics are applicable ceramics with high piezoelectric properties in high temperature fields.

scholarly journals Influence of Ta5+ content on the crystallographic structure and electrical properties of [001]PC-oriented (Li,Na,K)(Nb,Ta)O3 single crystals

CrystEngComm ◽  
2016 ◽  
Vol 18 (12) ◽  
pp. 2081-2088 ◽  
Author(s):  
Hairui Liu ◽  
Philippe Veber ◽  
Jurij Koruza ◽  
Daniel Rytz ◽  
Michael Josse ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Single Crystals ◽  
Perovskite Structure ◽  
Solution Growth ◽  
Lead Free ◽  
Crystallographic Structure ◽  
Growth Method ◽  
Top Seeded Solution Growth

A series of centimeter-sized lead-free piezoelectric Li+- and Ta5+-modified (Na,K)NbO3 single crystals with an ABO3 perovskite structure was successfully grown by the top-seeded solution growth method.

Effect of BaSnO3 on structural and electrical properties of lead free Na0.5Bi0.5TiO3 ceramic solid solution

2021 ◽  
Author(s):  
S Sasikumar ◽  
Huiqing Fan ◽  
Weijia Wang ◽  
T K Thirumalaisamy ◽  
S Saravanakumar ◽  
...  
Keyword(s):  
Solid Solution ◽  
Electrical Properties ◽  
Lead Free ◽  
Structural And Electrical Properties ◽  
Ceramic Solid Solution

Electrical Properties of Modified BNT Based Lead-Free Ceramics

2016 ◽  
Vol 872 ◽  
pp. 87-91
Author(s):  
Supalak Manotham ◽  
Tawee Tunkasiri ◽  
Pharatree Jaita ◽  
Pichitchai Butnoi ◽  
Denis Russell Sweatman ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Solid State ◽  
Electrical Properties ◽  
Sintering Temperature ◽  
Ferroelectric Properties ◽  
Lead Free ◽  
Second Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Lead Free Ceramics

The properties of modified Bi0.5Na0.5TiO3 (BNT) based lead-free ceramics were investigated. The BNT-based ceramics were prepared by a solid-state mixed oxide method Phase formation was determined by X-ray diffraction technique (XRD). The X-ray diffraction analysis of the ceramics suggested that all samples exhibited a perovskite structure without second phase. The value of dielectric constant increased with increasing in sintering temperature. Moreover, high sintering temperatures could improve ferroelectric properties of BNT base lead-free ceramics.

Piezoelectric, Dielectric and Ferroelectric Properties of (1−x)(K0.48Na0.52)0.95Li0.05Nb0.95Sb0.05O3-xBa0.5(Bi0.5Na0.5)0.5ZrO3 Lead-Free Solid Solution

2018 ◽  
Vol 47 (10) ◽  
pp. 6053-6058 ◽  
Author(s):  
Brenda Carreño-Jiménez ◽  
Armando Reyes-Montero ◽  
M. E. Villafuerte-Castrejón ◽  
Rigoberto López-Juárez
Keyword(s):  
Solid Solution ◽  
Ferroelectric Properties ◽  
Lead Free

Low temperature consolidated lead-free ferroelectric niobate ceramics with improved electrical properties

2010 ◽  
Vol 25 (2) ◽  
pp. 240-247 ◽  
Author(s):  
Mirva Eriksson ◽  
Haixue Yan ◽  
Mats Nygren ◽  
Mike J. Reece ◽  
Zhijian Shen
Keyword(s):  
Electrical Properties ◽  
Low Temperature ◽  
Lead Zirconate Titanate ◽  
Ferroelectric Properties ◽  
Piezoelectric Ceramics ◽  
Lead Zirconate ◽  
Lead Free ◽  
Uniaxial Pressure ◽  
Densification Temperature ◽  
Plasma Sintering

There is a concerted effort to develop lead-free piezoelectric ceramics. (Na0.5K0.5)NbO3-based ceramics have good electrical properties, and are a potential replacement material for lead zirconate titanate piezoelectric ceramics. In this work a commercial powder based on (Na0.5K0.5)NbO3 with an initial particle size of ∼260 nm was consolidated by spark plasma sintering (SPS). To avoid volatilization, high mechanical pressures were used to minimize the densification temperature. It was found that under a uniaxial pressure of 100 MPa, fully densified compacts can be prepared at 850 °C. Ceramics densified at such a low temperature demonstrate an unusually high remanent polarization (30 μC/cm2) and high d33 (146 pC/N). The improved ferroelectric properties are ascribed to the homogeneous, dense, and submicron grained microstructure achieved.

Crystal Growth and Ferroelectric Properties in Bi0.5K0.5TiO3-Bi0.5Na0.5TiO3 Crystals

2010 ◽  
Vol 445 ◽  
pp. 7-10 ◽  
Author(s):  
Akifumi Morishita ◽  
Yuuki Kitanaka ◽  
Makoto Izumi ◽  
Yuji Noguchi ◽  
Masaru Miyayama
Keyword(s):  
Solid Solution ◽  
Crystal Growth ◽  
Single Crystals ◽  
Coercive Field ◽  
Remanent Polarization ◽  
Ferroelectric Properties ◽  
Flux Growth ◽  
Flux Method ◽  
Large Remanent Polarization ◽  
Soaking Temperature

Single crystals of x (Bi0.5K0.5)TiO3-(1-x)(Bi0.5Na0.5)TiO3 (BKT-BNT) solid solution were grown by a flux method, and their ferroelectric properties were investigated along [100]cubic (the cubic notation). While the flux growth soaked at 1250 °C led to the crystals with a composition of x less than 0.14, the crystals with x of 0.45 were obtained by decreasing soaking temperature to 1150 °C. The crystals of BKT-BNT (x = 0.45) exhibited a relatively large remanent polarization of 39  C/cm2 and a low coercive field of 23 kV/cm.

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