scholarly journals Structure and Physical Properties of PZT-PMnN-PSN Ceramics Near the Morphological Phase Boundary

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Nguyen Dinh Tung Luan ◽  
Le Dai Vuong ◽  
Truong Van Chuong ◽  
Nguyen Truong Tho
Keyword(s):  
Physical Properties ◽  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Coercive Field ◽  
Phase Structure ◽  
Remanent Polarization ◽  
Perovskite Phase ◽  
Electromechanical Properties ◽  
Ceramic Samples ◽  
Pure Perovskite Phase

The 0.9Pb(ZrxTi1−x)O3-0.07Pb(Mn1/3Nb2/3)O3-0.03Pb(Sb1/2Nb1/2)O3(PZT-PMnN-PSN) ceramics were prepared by columbite method. The phase structure of the ceramic samples was analyzed. Results show that the pure perovskite phase is in all ceramics specimens. The effect of the Zr/Ti ratio on the region of morphotropic phase boundary for PZT-PMnN-PSN ceramics was studied. Experimental results show that the phase structure of ceramics changes from tetragonal to rhombohedral with the increase of the content of Zr/Ti ratio in the system. The composition of PZT-PMnN-PSN ceramics near the morphotropic phase boundary obtained is the ratio of Zr/Ti: 49/51. At this ratio, the ceramic has the optimal electromechanical properties: thekp=0.61, theεmax=29520, thed31=-236 pC/N, theQm=2400, high remanent polarization (Pr=49.2 μC·cm−2), and low coercive fieldEc=10.28 kV·cm−1.

Effects of Zr/Ti Ratio on the Structure and Ferroelectric Properties in PZT-PZN-PMN Ceramics near the Morphotropic Phase Boundary

2008 ◽  
Vol 55-57 ◽  
pp. 125-128 ◽  
Author(s):  
R. Muanghlua ◽  
S. Niemchareon ◽  
Wanwilai C. Vittayakorn ◽  
Naratip Vittayakorn
Keyword(s):  
Transition Temperature ◽  
Phase Boundary ◽  
Coercive Field ◽  
Phase Structure ◽  
Remanent Polarization ◽  
Perovskite Phase ◽  
Ferroelectric Properties ◽  
Piezoelectric Ceramics ◽  
Pure Perovskite Phase ◽  
All Ceramic

The piezoelectric ceramics of Pb(ZrxTi1−x)O3 – Pb(Zn1/3Nb2/3)O3 – Pb(Mn1/3Nb2/3)O3; PZT-PZN-PMN with Zr/Ti ratios of 48/52, 50/50 and 52/48 were fabricated in order to investigate the effect of compositional modifications on the ferroelectric properties of PZT-PZN-PMN ceramics. The phase structure of ceramics sintered at 1,150°C was analyzed. Results show that the pure perovskite phase was in all ceramic specimens, and the phase structure of PZT-PZN-PMN piezoelectric ceramics transformed from tetragonal to rhombohedral, with the Zr/Ti ratios increased in the system. The PZT-PZN-PMN ceramics with a Zr/Ti ratio of 50/50 exhibited the most promising properties including high remanent polarization and low coercive field of 25.95 µC cm−2 and 12.5 kV cm−1, respectively. Furthermore, the transition temperature decreased when the Zr/Ti ratio increased in the system.

Ferroelectric Properties of Sn-Doped PZT–PNN Ceramics

2008 ◽  
Vol 55-57 ◽  
pp. 933-936
Author(s):  
Krit Sutjarittangtham ◽  
Uraiwan Intatha ◽  
Sukum Eitssayeam ◽  
Gobwute Rujijanagul
Keyword(s):  
Grain Size ◽  
Binary System ◽  
Remanent Polarization ◽  
Perovskite Phase ◽  
Ferroelectric Properties ◽  
Microstructural Analysis ◽  
X Ray ◽  
Sn Doping ◽  
Ceramic Samples ◽  
Pure Perovskite Phase

Binary system of 0.45Pb(Zr1/2Ti1/2)O3–0.55Pb(Ni1/3Nb2/3)O3with a composition close to the morphotropic phase boundary were investigated as a function of Sn doping (0.0-8.0 mole%). X-ray analysis showed that pure perovskite phase was observed for all samples. The density of the ceramic samples was increased with an increase of Sn concentration. However, microstructural analysis showed that Sn-doping has not a significant impact on grain size. Moreover, the increasing Sn-contant can reduce the remanent polarization but increase the dielectic contant.

scholarly journals Elastic, dielectric and electromechanical properties of (Bi0.5Na0.5)TiO3-BaTiO3 piezoceramics at the morphotropic phase boundary region

2017 ◽  
Vol 690 ◽  
pp. 568-574 ◽  
Author(s):  
Rodrigo Machado ◽  
Valdeci B. dos Santos ◽  
Diego A. Ochoa ◽  
Elena Cerdeiras ◽  
Lourdes Mestres ◽  
...  
Keyword(s):  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Boundary Region ◽  
Electromechanical Properties ◽  
Elastic Dielectric

Structure and Piezoelectric Properties of PZN-PNN-PT Ceramics

2007 ◽  
Vol 280-283 ◽  
pp. 223-226 ◽  
Author(s):  
Jin Song Pan ◽  
Xiao Wen Zhang ◽  
Ke Pi Chen ◽  
Chao Lei
Keyword(s):  
Phase Structure ◽  
Piezoelectric Properties ◽  
Perovskite Phase ◽  
Ferroelectric Ceramics ◽  
Phase Boundaries ◽  
Precursor Method ◽  
Pure Perovskite Phase ◽  
The Relationship ◽  
Columbite Precursor ◽  
Better Than

(1-x)(0.64PNN-0.36PT)-x(0.91PZN-0.09PT) ferroelectric ceramics with different x were synthesized by the columbite precursor method. The phase structure and piezoelectric properties were investigated. XRD profiles implied that with the increasing of x, samples could no longer maintain the pure perovskite phase. All the compositions were found to lie within the region of the morphotropic phase boundaries (MPBs) with different contents of rhombohedral and tetragonal phases. The piezoelectric coefficients for compositions with x £ 0.30 were obviously better than those for the rest ones and the composition with x = 0.15 exhibited the largest value of d33 among all the samples. The relationship between the structure and the piezoelectric properties was discussed.

Effects of Dwell Time Sintering on Microstructure, Piezoelectric and Mechanical Properties of Modified BNT-Based Ceramics

2016 ◽  
Vol 675-676 ◽  
pp. 544-547
Author(s):  
Supalak Manotham ◽  
Thanatep Phatungthane ◽  
Tawee Tunkasiri ◽  
Komsanti Chokethawat
Keyword(s):  
Mechanical Properties ◽  
Dwell Time ◽  
Perovskite Phase ◽  
Microstructural Analysis ◽  
Lead Free ◽  
Ceramic Samples ◽  
Lead Free Ceramics ◽  
Pure Perovskite Phase ◽  
Sintering Method ◽  
Rhombohedral Symmetry

The properties of modified Bi0.5Na0.5TiO3 (BNT) based lead-free ceramics were investigated. The BNT-based ceramics were prepared by a two-steps sintering method. The ceramics were sintered at T1=1373 K and T2= 1173 K for various dwell times (0, 2, 4, and 8h). The properties of the ceramics were characterized by many techniques. The ceramic samples exhibited a pure perovskite phase with rhombohedral symmetry. The microstructural analysis by a scanning electron microscopy (SEM), indicated that all ceramics had a similar microstructure. Piezoelectric and mechanical properties of the ceramics were improved at a suitable dwell time at T2.

Electromechanical Properties of PMN–PZT Piezoelectric Single Crystals Near Morphotropic Phase Boundary Compositions

2007 ◽  
Vol 0 (0) ◽  
pp. 071009211918002-??? ◽  
Author(s):  
Shujun Zhang ◽  
Sung-Min Lee ◽  
Dong-Ho Kim ◽  
Ho-Yong Lee ◽  
Thomas R. Shrout
Keyword(s):  
Phase Boundary ◽  
Single Crystals ◽  
Morphotropic Phase Boundary ◽  
Electromechanical Properties

Influence of Ta content on the physical properties of SrBi2Ta2O9 ferroelectric thin films

2006 ◽  
Vol 21 (12) ◽  
pp. 3124-3133 ◽  
Author(s):  
Fan-Yi Hsu ◽  
Ching-Chich Leu ◽  
Chao-Hsin Chien ◽  
Chen-Ti Hu
Keyword(s):  
Thin Films ◽  
Physical Properties ◽  
Spin Coating ◽  
Coercive Field ◽  
Remanent Polarization ◽  
Ferroelectric Properties ◽  
Ferroelectric Thin Films ◽  
Preferential Orientation ◽  
Strontium Bismuth Tantalate ◽  
Metalorganic Decomposition

We have investigated the effect that the Ta content has on the ferroelectric properties of strontium bismuth tantalate (SBT) thin films synthesized using metalorganic decomposition (MOD) and spin coating techniques. The physical properties of these SBT samples were strongly dependent upon the Ta ratio. Polarization measurements revealed that Ta-deficient SBT exhibited a relatively low coercive field (2Ec ∼ 87 kV/cm) and a high remanent polarization (2Pr ∼ 15 μC/cm2). The value of 2Pr decreased as the Ta ratio in SBT increased. The improved ferroelectric properties of the Ta-deficient SBT samples may have resulted from the uniformly well-grown bismuth-layered-structured (BLS) phases of the films and their highly preferential orientation along the a and b axes. We suggest that the incorporation of Ta vacancies plays an important role in enhancing the crystallinities and microstructures of Ta-deficient SBT films.

Structural, dielectric and electromechanical properties of Cr-doped PLZT close to the morphotropic phase boundary region

2006 ◽  
Vol 79 (11) ◽  
pp. 875-887 ◽  
Author(s):  
A. K. Shukla ◽  
V. K. Agrawal ◽  
I. M. L. Das ◽  
Janardan Singh ◽  
D. P. Singh ◽  
...  
Keyword(s):  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Boundary Region ◽  
Electromechanical Properties
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