Showing papers in "Ferroelectrics in 2018"
TL;DR: In this article, it has been proven that the piezoelectric property of polyvinylidene fluoride (PVDF) is not as good as that of PVDF.
Abstract: Poly(vinylidene fluoride) (PVDF) has been a kind of particularly attractive piezoelectric materials for its excellent piezoelectric property. It has been proven that the piezoelectric property of P...
51 citations
TL;DR: In this article, the effects of different volume ratio of PZT on the dielectric, piezoelectric and mechanical properties of the vibrator have been investigated.
Abstract: In this paper, the hot-pressing method is selected to prepare piezoelectric vibrator. The effects of different volume ratio of PZT on the dielectric, piezoelectric and mechanical properties of the ...
31 citations
TL;DR: Growth of LiTaO3 film on a type-p silicon substrate (100) was conducted using the Chemical Solution Deposition (CSD) and spin coating methods at a speed of 3000-rpm for 30 seconds as mentioned in this paper.
Abstract: Growth of LiTaO3 film on a type-p silicon substrate (100) was conducted using the Chemical Solution Deposition (CSD) and spin coating methods at a speed of 3000 rpm for 30 seconds. The film on the ...
31 citations
TL;DR: The microstructure and mechanical properties of the additive manufacturing AlSi10Mg alloy, and the influence of laser direct metal deposition was used to manufacture AlSi 10Mg Alloy in this paper.
Abstract: Laser direct metal deposition was used to manufacture AlSi10Mg alloy in this study. The microstructure and mechanical properties of the additive manufacturing AlSi10Mg alloy, and the influence of s...
26 citations
TL;DR: In this paper, the fundamentals of the vibronic theory of ferroelectricity in perovskite crystals of ABO3 type, its main achievements and significant applications, are discussed.
Abstract: In a semi-review paper, the fundamentals of the vibronic (pseudo Jahn-Teller) theory of ferroelectricity in perovskite crystals of ABO3 type, its main achievements and significant applications, are...
21 citations
TL;DR: In this paper, the authors reviewed recent progress on wearable devices based on piezoelectric sensors and showed that many researches have turned their eyes to the studies of wearable devices that are based on PIR sensors.
Abstract: This paper reviews recent progress on the wearable devices based on piezoelectric sensors. In recent years, many researches have turned eyes to the studies of wearable devices based on piezoelectri...
20 citations
TL;DR: In view of the importance of rare earth modified PZT, Gd-modified lead zirconate titanate (PGZT) ceramics with a general chemical formula Pb1-xGdx(Zr0.35Ti0.65)1x/4O3 (x = 0, 0.07,0.12) nea...
Abstract: In view of the importance of rare – earth modified PZT, Gd-modified lead zirconate titanate (PGZT) ceramics with a general chemical formula Pb1-xGdx(Zr0.35Ti0.65)1-x/4O3 (x = 0, 0.07,0.10,0.12) nea...
18 citations
TL;DR: In this paper, OMT was used as a synergistic agent in poly (lactic acid) (PLA) intumescent flame retardant (IFR) system, and the thermal and combustion behavior of the system was analyzed.
Abstract: Organo-montmorillonite (OMMT) is utilized as a synergistic agent in poly (lactic acid) (PLA) intumescent flame retardant (IFR) system. The thermal and combustion behavior of PLA intumescent systems...
16 citations
TL;DR: In this article, thin films of Se-based chalcogenide glassy alloys Ge10-xSe60Te30Inx (x = 0, 2, 4, 6) were deposited on to glass substrate by vacuum evaporation technique.
Abstract: Thin films of Se based chalcogenide glassy alloys Ge10-xSe60Te30Inx (x = 0, 2, 4, 6) were deposited on to glass substrate by vacuum evaporation technique. Glassy nature of the film has been confirm...
16 citations
TL;DR: In this article, α-Fe2O3 nanowires were prapared by electrospinning combined with calcination, and the effect of calcination temperature on their microstructure and properties were also analyzed.
Abstract: In this paper, α-Fe2O3 nanowires were prapared by electrospinning combined with calcination, and the effect of calcination temperature on their microstructure and properties were also analyzed. The...
15 citations
TL;DR: In this article, a modified nano-Sb2O3 could dramatically affect pyrolysis of fire retardant system, and improved the flame-retardant performance.
Abstract: Modified nano-Sb2O3 could dramatically affect pyrolysis of fire retardant system, and improved the flame-retardant performance. Modified nano-Sb2O3 was prepared by planetary high-energy ball mill a...
TL;DR: M-type strontium ferrites (Sr1-xGdxFe12-xCuxO19, x = 0.00, 0.15 and 0.20) doped with equivalent ions were synthesized via the solid phase method as discussed by the authors.
Abstract: M-type strontium ferrites (Sr1-xGdxFe12-xCuxO19, x = 0.00, 0.05, 0.10, 0.15 and 0.20) doped with equivalent ions were synthesized via the solid phase method. The crystallographic structure,...
TL;DR: X-ray diffraction and Мossbauer studies of perovskite BiFe1-xCrxO3 solid solution ceramics fabricated under high pressure (4-6 GPa) have been carried out.
Abstract: X-ray diffraction and Мossbauer studies of perovskite BiFe1-xCrxO3 solid solution ceramics fabricated under high pressure (4–6 GPa) have been carried out. Two morphotropic phase boundaries were rev...
TL;DR: In this paper, the authors investigated the as-grown domain structure in LiTaO3 with different nonuniform spatial distributions of deviation from stoichiometry and explained the mechanisms of domain structure formation due to phase transition and subsequent cooling.
Abstract: We investigated the as-grown domain structure in LiTaO3 with different nonuniform spatial distributions of deviation from stoichiometry. The as-grown structure formed due to cooling below Curie temperature after vapor transport equilibration (VTE) process. The formation of wide charged domain boundary consisting of smooth head-to-head and zig-zag tail-to-tail charged domain walls and flat neutral domain walls was observed. The mechanisms of domain structure formation due to phase transition and subsequent cooling were explained. The different type of charged domain walls in ferroelectrics attracts interest due to possibilities of its applications.
TL;DR: In this paper, the Pb(Zr0.56Ti0.44)O3 (PZT) ceramics were subjected to a pressure-induced activation at 320 MPa in a Bridgman anvil, where a load pressure was combined with a shear deformation.
Abstract: The Pb(Zr0.56Ti0.44)O3 (PZT) ceramics was subjected to a pressure-induced activation at 320 MPa in a Bridgman anvil, where a load pressure was combined with a shear deformation. The induced changes in the linear and angular parameters of a unit cell, in the ratio of coexisting rhombohedral (R3m) and tetragonal (P4mm) phases as well as in the dielectric properties were analyzed.
TL;DR: In this article, a novel CdO/graphene alkali activated steel slag nanocomposite was firstly prepared and was used for photocatalytic degradation of direct fast bordeaux (DFB) dye.
Abstract: A novel CdO/graphene alkali-activated steel slag nanocomposite (CdO/GASSN) was firstly prepared and was used for photocatalytic degradation of direct fast bordeaux (DFB) dye. X-ray diffraction resu...
TL;DR: In this paper, the Sr1-xSmxFe12-xCuxO19 (0 ≤ x ≤ 0.2) materials were prepared by chemical co-precipitation technique.
Abstract: The Sr1-xSmxFe12-xCuxO19 (0 ≤ x ≤ 0.2) materials were prepared by chemical co-precipitation technique. The products were characterized by X-ray diffraction (XRD), fourier transform infrared spectro...
TL;DR: In this article, the turning experiments of Ti6Al4V alloy were carried out with ultra-fine grain coated carbide tools, CNMG12, for turning experiments with high efficiency and low machined surface integrity.
Abstract: Because of the low efficiency and low machined surface integrity during cutting Ti6Al4V, the turning experiments of Ti6Al4V alloy were carried out with ultra-fine grain coated carbide tools, CNMG12...
TL;DR: In this article, the authors performed molecular modeling of diphenylalanine peptide nanotubes (FF PNTs) using PM3 method in HyperChem and focused on the polar properties of FF PNT structures having different chiralit properties.
Abstract: Molecular modeling of diphenylalanine peptide nanotubes (FF PNT) is performed using PM3 method in HyperChem. The study focuses on the polar properties of FF PNT structures having different chiralit...
TL;DR: In this article, the method of preparation of [NH3(CH2)3NH3]CuCl4 and [NH 3(CH 2)3 NH3]CdBr4 is described, and optical and dilatometric studies are presented.
Abstract: The method of preparation of [NH3(CH2)3NH3]CuCl4 and [NH3(CH2)3NH3]CdBr4 crystals is given, and optical and dilatometric studies are presented. Optical polarized microscopic observation revealed multidomain states at room temperature orthorhombic phase with domain walls in (101) and (10-1) planes. The temperature dependence of the linear birefringence and the thermal expansion coefficient were measured and critical indices α and β were determined for the [NH3(CH2)3NH3]CdBr4 crystal. The linear birefringence and domain structure studies revealed the single first order transition in the [NH3(CH2)3NH3]CuCl4 crystal.
TL;DR: In this article, a Ferroelectric ceramic Sr0.8Na0.1Nd 0.1Bi4Ti4O15 (SNNBT) is prepared by solid state reaction method.
Abstract: Ferroelectric ceramic Sr0.8Na0.1Nd0.1Bi4Ti4O15 (SNNBT) is prepared by solid state reaction method. Single phase formation with orthorhombic structure is confirmed by X- Ray diffraction anal...
TL;DR: In this article, the photoluminescence properties of CaTiO3 phosphor powders co-doped with Eu3+ and Mg2+, were characterized by X-ray diffraction, Raman...
Abstract: The photoluminescence properties of CaTiO3 phosphor powders co-doped with Eu3+ and Mg2+, were prepared by the solid-state reaction method. The powders were characterized by X-ray diffraction, Raman...
TL;DR: An environment-friendly graphene reinforced slag-based nanocomposite (GRSN) was synthesized by incorporation of two-dimensional lamellar graphene into the alkali-activated blast-furnace sla... as discussed by the authors.
Abstract: An environment-friendly graphene reinforced slag-based nanocomposite (GRSN) was synthesized by incorporation of two-dimensional lamellar graphene into the alkali-activated blast-furnace sla...
TL;DR: Methyl Malonic acid (MM) forms hydrogen bonds with octyloxy benzoic acid (8OBA), nonyloxy benzosic acid(9OBA).
Abstract: Methyl Malonic acid (MM) forms hydrogen bonds with octyloxy benzoic acid (8OBA), nonyloxy benzoic acid (9OBA), decyloxy benzoic acid (10OBA) labeled as MM+8OBA, MM+9OBA, and MM+10OBA respectively, ...
TL;DR: In this paper, compositional ordering degree of the Yb3+ and M5+ ions in Pb2YbМO6 ceramics and, correspondingly, both temperature and diffusion of antiferroelectric phase transition can be varied within a wide range by means of high-energy mechanical activation.
Abstract: It has been found out that compositional ordering degree of the Yb3+ and M5+ (M – Nb, Ta) ions in Pb2YbМO6 ceramics and, correspondingly, both temperature and diffusion of antiferroelectric phase transition can be varied within a wide range by means of high-energy mechanical activation. In particular, disordered modifications of Pb2YbМO6 (M – Nb, Ta) were obtained without using any additives for the first time.
TL;DR: In this article, the electronic and magnetic properties of rare-earth metals (RE = La, Ce, Nd) doped phosphorene were investigated by first-principles calculations.
Abstract: The electronic and magnetic and optical properties of rare-earth metals (RE = La, Ce, Nd) doped phosphorene were investigated by first-principles calculations. The results show that all the structu...
TL;DR: In this article, the effect of various over stoichiometric additives on phase formation, unit cell parameters, microstructure, dielectric and ferroelectric properties of solid solutions has been studied.
Abstract: Influence of various over stoichiometric additives on phase formation, unit cell parameters, microstructure, dielectric and ferroelectric properties of solid solutions 0.8[0.8(Na0.5Bi0.5)TiO3-0.2BaTiO3]-0.2Bi(Mg0.5Ti0.5)O3 system has been studied.The unit cell volume slightly decreased in case of the V2O5 additives but did not change in case of Bi2O3, LiF, and KCl additives. Increase in dielectric parameters ert and tanδrt values at the room temperature was revealed for compositions doped by KCl additives, while these parameters decreased in compositions doped by the V2O5 additives. Linear correlation between piezoelectric coefficient d33 measured for separate grains using the Piezoresponse Force Microscopy method and dielectric permittivity ert values at the room temperature was confirmed.
TL;DR: In this article, the surface modification of polystyrene microsphere by ozone treatment was investigated using a series of series of experiments and the effects of the ozone treatment on the surface properties were investigated.
Abstract: We report the surface modification of polystyrene microsphere by ozone treatment. The effects of the ozone treatment on the surface properties of polystyrene microsphere are probed using a series o...
TL;DR: In this paper, the authors synthesize Ca0.1Sr0.9LaxBi2-xTa2O9 ceramics through solid state double sintering route.
Abstract: ABSTRACT Ca0.1Sr0.9LaxBi2-xTa2O9 ceramics were synthesized through solid state double sintering route. Impedance, resonance and anti-resonance studies under clamped state were carried out on the prepared ceramics. The activation energy for relaxation is within the range 0.850–1.230 eV depending up on composition x. Equivalent circuit modelling was done to the experimental Cole-Cole data so as to obtain the grain, grain boundary resistance and capacitance. The activation energy for grain conduction increased with the increase of x value except for x = 0.05 ceramic composition. The activation energy for grain boundary conduction is lower for the ceramic compositions with lanthanum doped when compared to pure CSBT ceramic. The activation energy for grain and grain boundary conduction are within the range 0.748–1.338 eV depending up on composition x and temperature. The electromechanical coupling factors are above 0.9990 and vary in fourth decimal place with the increase of temperature and composition x. The electromechanical coupling factor decreased with the increase of x value.
TL;DR: In this paper, the application and optimization of direct piezoelectric effect in energy harvesting from low frequency mechanical vibrations such as from roadway torsions is studied. But the primary focus of this paper is on the application of direct PDE in the energy harvesting process.
Abstract: The primary focus of this research is on the application and optimization of direct piezoelectric effect in energy harvesting from low frequency mechanical vibrations such as from roadway t...