Chemical Composition of Dielectric and Piezoelectric Properties for BaTiO3-Bi (Mg1/2Ti1/2)O3-BiFeO3 System Ceramics

2013 ◽  
Vol 582 ◽  
pp. 84-87 ◽  
Author(s):  
Ryuta Mitsui ◽  
Ichiro Fujii ◽  
Kouichi Nakashima ◽  
Nobuhiro Kumada ◽  
Yoshihiro Kuroiwa ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Curie Temperature ◽  
Piezoelectric Properties ◽  
Perovskite Phase ◽  
Rhombohedral Phase ◽  
Cubic Phase ◽  
X Ray Diffraction ◽  
Synthesis And Crystal Structure ◽  
X Ray ◽  
Dielectric And Piezoelectric Properties

1-x-y)BaTiO3-xBi (Mg1/2Ti1/2)O3-yBiFeO3 ceramics were prepared by a conventional solidstate synthesis, and crystal structure and electric properties were investigated. Synchrotron X-ray diffraction pattern revealed that a single perovskite phase was obtained for samples at x=0.05-0.15, y=0.46.5-73.5. Splitting of the (111) peak was observed when (x, y) = (0.050, 0.685) and (0.050, 0.735) indicating that crystal structure of samples changed from a pseudo-cubic phase to a rhombohedral phase with increasing BF. As the BF content increased, the Curie temperature increased. The largest maximum strain (Smax) over the applied maximum electric field (Emax) value (Smax / Emax) of 300 pm/V was observed for 0.365BT-0.050BMT-0.585BF at 25 °C and 1Hz with the Curie temperature of 390 °C.

Dielectric and Piezoelectric Properties of Na0.42K0.08Bi0.5 TiO3 and Na0.45K0.05Bi0.5TiO3 Ceramics

2007 ◽  
Vol 280-283 ◽  
pp. 251-254 ◽  
Author(s):  
Su Chuan Zhao ◽  
Lina Zhang ◽  
Guo Rong Li ◽  
Liao Ying Zheng ◽  
Ai Li Ding
Keyword(s):  
Room Temperature ◽  
Piezoelectric Properties ◽  
Perovskite Phase ◽  
X Ray Diffraction ◽  
Depolarization Temperature ◽  
X Ray ◽  
Single Perovskite Phase ◽  
Dielectric And Piezoelectric Properties ◽  
Rhombohedral Symmetry ◽  
Ferroelectric And Piezoelectric Properties

Na0.42K0.08Bi0.5TiO3 and Na0.45K0.05Bi0.5TiO3 ceramics were fabricated by the solid-state reaction. The structures were determined by X-ray diffraction. Dielectric, ferroelectric and piezoelectric properties of the ceramics were measured and discussed. The ceramics have a single perovskite phase with rhombohedral symmetry at room temperature. The thermal variations of the permittivity follow the law 1/ e − 1/ em = C(T − Tm)2 which is the character of typical relax ferroelectrics, when temperature is higher than the temperature of the maximum of dielectric constant (Tm). The depolarization temperature (Td) of spontaneous polarization is 215oC for Na0.45K0.05Bi0.5TiO3 and 152oC for Na0.42K0.08Bi0.5TiO3 respectively. There exist two different dielectric behaviors of the Na0.42K0.08Bi0.5TiO3 ceramic, without and after poling. Na0.45K0.05Bi0.5TiO3 possesses relatively high kt and Td. The use for device application has been indicated.

Piezoelectric and Dielectric Properties of MnO2-Modified Bi(Mg1/2Ti1/2)O3–PbTiO3

2011 ◽  
Vol 415-417 ◽  
pp. 1983-1987
Author(s):  
Xiao Na Wang ◽  
Qing Chi Sun ◽  
Wei Bing Ma ◽  
Tao Liu ◽  
Yong Zhang ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Curie Temperature ◽  
Room Temperature ◽  
Piezoelectric Properties ◽  
High Curie Temperature ◽  
X Ray Diffraction ◽  
X Ray ◽  
Stable Temperature ◽  
Curie Temperature Tc ◽  
Dielectric And Piezoelectric Properties

We reported that Bi(Mg1/2Ti1/2)O3–PbTiO3(BMT-PT) systems had high piezoelectric, dielectric performances and high Curie temperature. The phase structure of the system was identified by X-ray diffraction analysis. The piezoelectric and dielectric properties were also investigated. The results showed that 0.6BMT–0.4PT (Mg/Ti = 0.5:0.5) with 1mol% MnO2was the optimum composition which exhibited the highest curie temperature Tc = 511 °C and the stable temperature of dielectric loss reached to 500 °C. Further, the dielectric and piezoelectric properties of this composition were given as follows:kp = 22.5%;εr= 734; room temperature d33= 131.3 pC/N; tanδ = 1.96%.

Preparation of Bismuth Copper Based Perovskite-Type Ceramics and their Piezoelectric Properties

2013 ◽  
Vol 566 ◽  
pp. 85-88 ◽  
Author(s):  
Atsushi Shimamura ◽  
Ichiro Fujii ◽  
Kouichi Nakashima ◽  
Yoshihiro Kuroiwa ◽  
Satoshi Wada
Keyword(s):  
Crystal Structure ◽  
Curie Temperature ◽  
Relative Density ◽  
Piezoelectric Properties ◽  
Perovskite Phase ◽  
Piezoelectric Constant ◽  
Single Perovskite Phase ◽  
Perovskite Type ◽  
Dielectric And Piezoelectric Properties

The structural, and dielectric and piezoelectric properties of 0.3BaTiO3- 0.1x(x= Bi (Mg1/2Ti1/2)O3, Bi (Cu1/2Ti1/2)O3, Bi (Cu2/3Nb1/3)O3, (Bi1/2K1/2)(Cu1/3Nb2/3)O3) 0.6BiFeO3ceramics were studied. The relative density of all the samples was more than 94 %. A single perovskite phase was obtained for the samples, and the crystal structure was pseudo-cubic. The Curie temperature ofx=Bi (Mg1/2Ti1/2)O3and Bi (Cu1/2Ti1/2)O3system ceramics was higher than 400 °C. The apparent piezoelectric constantd33* ofx=Bi (Mg1/2Ti1/2)O3, Bi (Cu1/2Ti1/2)O3, Bi (Cu2/3Nb1/3)O3and (Bi1/2K1/2)(Cu1/3Nb2/3)O3system ceramics was 311, 212, 75 and 70 pm/V, respectively.

Phase Structure, Microstructure and Electrical Properties of Lead-Free (1-x) [Na0.515K0.485]0.94Li0.06(Nb0.99Ta0.01)O3 - BiAlO3 Ceramics

2013 ◽  
Vol 747 ◽  
pp. 781-784 ◽  
Author(s):  
Pornsuda Bomlai
Keyword(s):  
Phase Transition ◽  
Electrical Properties ◽  
Phase Structure ◽  
Piezoelectric Properties ◽  
Perovskite Phase ◽  
Lead Free ◽  
Cubic Phase ◽  
X Ray Diffraction ◽  
Polymorphic Phase Transition ◽  
Dielectric And Piezoelectric Properties

Lead-free (1-x)[(Na0.515K0.485)0.94Li0.06(Nb0.99Ta0.01)O3]-xBiAlO3 (NKLNT-BA; x = 0, 0.005, 0.010, 0.015, and 0.020) ceramics were fabricated by a conventional mixed-oxide method. The effects of BiAlO3 addition on the phase structure, microstructure and electrical properties of ceramic were then studied. The result indicated that grain size decreased with increasing of BiAlO3 content. In the composition range studied, the perovskite phase with the coexistence of the orthorhombic and tetragonal phases was identified at approximately x 0.005 by the X-ray diffraction analysis and dielectric spectroscopy, which led to a significant enhancement of the piezoelectric properties. The tetragonality increased with further increasing x. The temperature dependence of dielectric properties showed that the addition of BiAlO3 slightly decreased the ferroelectric tetragonal-paraelectric cubic phase transition temperature (TC), but greatly shifted the polymorphic phase transition from the ferroelectric orthorhombic to the ferroelectric tetragonal phase (TOT) to lower room temperature. The dielectric and piezoelectric properties are enhanced for the composition near the orthorhombic-tetragonal polymorphic phase boundary. The unmodified-(Na0.515K0.485)0.94Li0.06(Nb0.99Ta0.01)O3 ceramics exhibit optimum electrical properties (d33 = 225 pC/N and TC = 418°C).

Dielectric and Piezoelectric Properties of xPb(Ni1/3Nb2/3)O3 - yPb(Mn1/3Nb1/3Sb1/3)O3- (1-x-y)Pb(Zr0.48Ti0.52)O3 Ceramics

2006 ◽  
Vol 317-318 ◽  
pp. 849-852
Author(s):  
Hua Jun Sun ◽  
Wen Chen ◽  
Xiao Fang Liu ◽  
Qing Xu ◽  
Jing Zhou ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Curie Temperature ◽  
Perovskite Structure ◽  
Single Phase ◽  
Piezoelectric Properties ◽  
X Ray Diffraction ◽  
Step Method ◽  
X Ray ◽  
Curie Temperature Tc ◽  
Dielectric And Piezoelectric Properties

xPb(Ni1/3Nb2/3)O3-yPb(Mn1/3Nb1/3Sb1/3)O3-(1-x-y)Pb(Zr0.48Ti0.52)O3 ceramics have been prepared by a columbite two-step method. NiNb2O6, MnNb2O6 and MnSb2O6 were used as precursors to produce the pseudoquintnary system ceramics. X-ray diffraction (XRD) results indicate that the pseudoquintnary system ceramics have a single-phase perovskite structure. The piezoelectric and dielectric properties of the ceramics were investigated as functions of x or y. The addition of Pb(Ni1/3Nb2/3)O3 makes the piezoelectric properties to become ‘soft’, while the addition of Pb(Mn1/3Nb1/3Sb1/3)O3 makes the piezoelectric properties to be ‘hard’. The Curie temperature (Tc) of the pseudoquintnary system decreases with the increase of Pb(Ni1/3Nb2/3)O3 or Pb(Mn1/3Nb1/3Sb1/3)O3 contents. The preferred piezoelectric properties were obtained in the composition with x=0.06 and y=0.06.

scholarly journals High-pressure synthesis and crystal structure of the mixed-cation borate Ga4In4B15O33(OH)3

2019 ◽  
Vol 74 (4) ◽  
pp. 357-363
Author(s):  
Daniela Vitzthum ◽  
Hubert Huppertz
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
High Temperature ◽  
Diffraction Data ◽  
X Ray Diffraction ◽  
Synthesis And Crystal Structure ◽  
X Ray ◽  
Mixed Cation ◽  
High Pressure High Temperature ◽  
Pressure Synthesis

AbstractThe mixed cation triel borate Ga4In4B15O33(OH)3 was synthesized in a Walker-type multianvil apparatus at high-pressure/high-temperature conditions of 12.5 GPa and 1300°C. Although the product could not be reproduced in further experiments, its crystal structure could be reliably determined via single-crystal X-ray diffraction data. Ga4In4B15O33(OH)3 crystallizes in the tetragonal space group I41/a (origin choice 2) with the lattice parameters a = 11.382(2), c = 15.244(2) Å, and V = 1974.9(4) Å3. The structure of the quaternary triel borate consists of a complex network of BO4 tetrahedra, edge-sharing InO6 octahedra in dinuclear units, and very dense edge-sharing GaO6 octahedra in tetranuclear units.

Synthesis and Crystal Structure of the Flexible Ligand Coordination Polymer [Co3(bpd)5.5(NCS)6(NH3)]n⋅2H2O(bpd= 1,4-bis (4-pyridyl)-2,3-diaza-1,3-butadiene)

2013 ◽  
Vol 803 ◽  
pp. 80-84
Author(s):  
Yu Qi Liu ◽  
Yong Yang ◽  
Rui Yang ◽  
Xiao Jun Xu
Keyword(s):  
Crystal Structure ◽  
Infrared Spectroscopy ◽  
Coordination Polymer ◽  
Single Crystal ◽  
X Ray Diffraction ◽  
Synthesis And Crystal Structure ◽  
X Ray ◽  
Elemental Analyses ◽  
Ligand Coordination ◽  
Point Symbol

A novel metalorganic coordination polymer, namely [Co3(bpd)5.5(NCS)6(NH3)]n2H2O (1) (bpd=1,4-bis (4-pyridyl)-2,3-diaza-1,3-butadiene), has been synthesized and characterized by elemental analyses, infrared spectroscopy, and single-crystal X-ray diffraction. Compound 1 presents 2D[3,4,-connected 3-nodal net with the point symbol (4268210)(4462)(8210). In addition, four identical 2D single nets is interlocked with each other in parallel, thus directly leading to the formation of a polycatenated layer (2D2D).

Synthesis and crystal structure of (Ag,Pd)22Se6

2013 ◽  
Vol 28 (1) ◽  
pp. 13-17 ◽  
Author(s):  
F. Laufek ◽  
A. Vymazalová ◽  
D.A. Chareev ◽  
A.V. Kristavchuk ◽  
J. Drahokoupil ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Diffraction Data ◽  
Glass Tube ◽  
Structure Type ◽  
X Ray Diffraction ◽  
Unit Cell Parameters ◽  
Synthesis And Crystal Structure ◽  
X Ray ◽  
Cell Parameters ◽  
Silica Glass Tube

The (Ag,Pd)22Se6 phase was synthesized from individual elements by silica glass tube technique and structurally characterized from powder X-ray diffraction data. The (Ag,Pd)22Se6 phase crystallizes in Fm$\overline3$m symmetry, unit-cell parameters: a = 12.3169(2) Å, V = 1862.55(5) Å3, Z = 4, and Dc = 10.01 g/cm3. The crystal structure of the (Ag,Pd)22Se6 phase represents a stuffed 3a.3a.3a superstructure of the Pd structure (fcc), where only 4 from 108 available octahedral holes are occupied. Its crystal structure is related to the Cr23C6 structure type.

Effect of Sintering Temperatures and Ba/Ti Ratio on Dielectric Properties of BaTiO3 Ceramic

2013 ◽  
Vol 750-752 ◽  
pp. 506-511
Author(s):  
Yuan Yuan Li ◽  
Gui Xia Dong ◽  
Bi Yan Zhu ◽  
Qiu Xiang Liu ◽  
Di Wu
Keyword(s):  
Crystal Structure ◽  
Dielectric Properties ◽  
Curie Temperature ◽  
Sintering Temperature ◽  
Solid Phase ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Method Effect

As a research object, the samples with various Ba/Ti ratios (Ba/Ti=0.95~1.05) were synthesized by solid phase reaction method. Effect of sintering temperatures and Ba/Ti ratio on dielectric properties and crystal structure of BaTiO3ceramic were investigated. Crystal structure and crystal phase composition were investigated by scanning electron microscopy and X-ray diffraction. The dielectric properties were studied by Agilent 4294A at 1 kHz. The results show that the BaTiO3ceramic has high permittivity and dielectric loss at 1340°C. The permittivity of BaTiO3ceramic with Ba/Ti=0.95 change small as the sintering temperatures vary at 1320°C. With the increasing of Ba/Ti ratio, the Curie temperature first increases and then decreases as the sample sintering at 1320°C. When Ba/Ti=1, the Curie temperature increase with the sintering temperature increasing.

Synthesis and Crystal Structure of the Triple-decker Complex [(η5-C5Me5)- Ru(μ,η5-1,3-C3B2Me5)RhCl- (Ph2PCH2)2]

2009 ◽  
Vol 64 (1) ◽  
pp. 141-144 ◽  
Author(s):  
Yong Nie ◽  
Thomas Oeser ◽  
Walter Siebert
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Diffraction Study ◽  
X Ray Diffraction ◽  
Synthesis And Crystal Structure ◽  
X Ray

The dimer [(η5-C5Me5)Ru(C3B2Me5)RhCl]2 (2) reacts with 1,2-bis(diphenylphosphino)ethane (dppe) to give the triple-decker complex [(η5-C5Me5)Ru(C3B2Me5)Rh- (dppe)Cl] (3). Its constitution follows from NMR and MS data, and a single-crystal X-ray diffraction study.

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