scholarly journals Influence of Matrix and Surfactant on Piezoelectric and Dielectric Properties of Screen-Printed BaTiO3/PVDF Composites

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2166
Author(s):  
Carlo Carbone ◽  
Mohammed Benwadih ◽  
Giulia D’Ambrogio ◽  
Minh-Quyen LE ◽  
Jean-Fabien Capsal ◽  
...  
Keyword(s):  
Screen Printing ◽  
Piezoelectric Coefficient ◽  
Piezoelectric Properties ◽  
Composite Layer ◽  
Fluorinated Surfactants ◽  
Different Temperatures ◽  
The Impact ◽  
Dielectric And Piezoelectric Properties ◽  
Insight Into ◽  
Screen Printed

The aim of this paper was to provide insight into the impact of matrix and surfactants on the rheology, morphology, and dielectric and piezoelectric properties of screen-printed BaTiO3/PVDF composites. Two matrices were compared (PVDF–HFP and PVDF–TrFE), and lead-free BaTiO3 microparticles were added in volume fractions of 30% and 60%. Here, we demonstrated that the presence of surfactants, helping to prevent phase separation, was crucial for achieving a decent screen-printing process. Fourier-transform infrared (FTIR) spectroscopy together with scanning electron microscopy (SEM) showed that the two “fluoro-benzoic acid” surfactants established stable bonds with BaTiO3 and improved the dispersion homogeneity, while the “fluoro-silane” proved to be ineffective due to it evaporating during the functionalization process. PVDF–TrFE composites featured a more homogeneous composite layer, with fewer flaws and lower roughness, as compared with PVDF–HFP composites, and their inks were characterized by a higher viscosity. The samples were polarized in either AC or DC mode, at two different temperatures (25 °C and 80 °C). The 30% BaTiO3 PVDF–TrFE composites with two fluorinated surfactants featured a higher value of permittivity. The choice of the surfactant did not affect the permittivity of the PVDF–HFP composites. Concerning the d33 piezoelectric coefficient, experimental results pointed out that PVDF–TrFE matrices made it possible to obtain higher values, and that the best results were achieved in the absence of surfactants (or by employing the fluoro-silane). For instance, in the composites with 60% BaTiO3 and polarized at 80 °C, a d33 of 7–8 pC/N was measured, which is higher than the values reported in the literature.

The Effect of (Li,Ce) Doping in Aurivillius Phase Material Na0. 5Bi4.5Ti4O15

2010 ◽  
Vol 146-147 ◽  
pp. 89-92
Author(s):  
Zhi Gang Gai ◽  
Yuan Yuan Feng ◽  
Jin Feng Wang ◽  
Hong Wu
Keyword(s):  
Piezoelectric Coefficient ◽  
Piezoelectric Properties ◽  
Aurivillius Phase ◽  
Promising Candidate ◽  
High Tc ◽  
Ce Modification ◽  
A Site ◽  
Site Vacancy ◽  
Dielectric And Piezoelectric Properties ◽  
State Processing

Na0.5Bi4.5Ti4O15-based materials with A-site vacancy were synthesized using conventional solid state processing. The (Li,Ce) modification of Na0.5Bi4.5Ti4O15-based materials resulted in the obvious improvement of the piezoelectric activity and dielectric permittivity. The dielectric and piezoelectric properties of Na0.5Bi4.5Ti4O15-based ceramics exhibiting a very stable temperature behavior, together with its high TC ~641oC, excellent piezoelectric coefficient ~28pC/N and very low temperature coefficient of resonant frequency, making the (Li,Ce) modified Na0.5Bi4.5Ti4O15-based ceramics a promising candidate for high temperature applications.

Effect of Gel-Calcination on Piezoelectric Property in (1-x)BiScO3-xPbTiO3 Ferroelectrics

2010 ◽  
Vol 434-435 ◽  
pp. 335-339
Author(s):  
Han Wang ◽  
Xiao Hui Wang ◽  
Shao Peng Zhang ◽  
Long Tu Li ◽  
Zhao Hui Huang
Keyword(s):  
Particle Size ◽  
Grain Size ◽  
Piezoelectric Property ◽  
Relative Density ◽  
Heating Rate ◽  
Piezoelectric Coefficient ◽  
Piezoelectric Properties ◽  
Processing Condition ◽  
Powder Particle Size ◽  
Different Temperatures

In this paper, the effect of gel-calcination on piezoelectric property in (1-x) BiScO3-xPbTiO3 with the composition of x=0.635 is investigated. According to previous work, the heating rate of 200°C/h and holding for 210min having been taken as the basic processing condition. The BSPT powders were obtained from the same sol solution but calcined at different temperatures, and then the powders were used to prepare BSPT ceramics. The result shows that for the bulk ceramics with higher relative density ( higher than 95%), with the increasing calcining temperature of the gel (from 420°C to 500°C), the piezoelectric coefficient d33 of ceramic specimens first increases to maximum of 636pC/N at 450°C, then shows a fluctuation. In this work how the powder activity and the grain size affect (which was leaded by powder particle size) piezoelectric properties of BSPT ceramics are discussed.

scholarly journals STRUCTURE, MICROSTRUCTURE, AND PIEZOELECTRIC PROPERTIES OF KNLNS-BNKZ LEAD-FREE CERAMICS UNDER THE EFFECT OF DIFFERENT SINTERING TEMPERATURES

2021 ◽  
Vol 11 (4) ◽  
pp. 25
Author(s):  
Phan Dinh Gio ◽  
Huynh Thi Chi ◽  
Le Tran Uyen Tu ◽  
Nguyen Truong Tho
Keyword(s):  
Electromechanical Coupling ◽  
Piezoelectric Coefficient ◽  
Piezoelectric Properties ◽  
Rhombohedral Phase ◽  
Mixed Phase ◽  
Coupling Coefficients ◽  
Dense Microstructure ◽  
Lead Free Ceramics ◽  
Different Temperatures ◽  
Ceramic Density

Samples of 0.96(K0.48Na0.48Li0.04)(Nb0.95Sb0.05)O3-0.04Bi0.5(Na0.82K0.18)0.5ZrO3 piezoelectric ceramic were fabricated with conventional ceramic techniques and sintered at different temperatures. The effect of sintering temperature (TS) on the structure, microstructure, and piezoelectric properties of the ceramics was studied in detail. The experimental results showed that with an increase of the TS temperature, the structure of the ceramics transformed from an orthorhombic-tetragonal mixed phase (O-T) at TS £ 1100 °C into a rhombohedral-tetragonal (R-T) mixed phase with a dense microstructure of uniform grain size at TS = 1110 °C. When TS was further increased (TS ³ 1120 °C), the ceramics showed only a rhombohedral phase (R). The ceramics showed the best electrical properties for TS = 1110 °C at which the rhombohedral and tetragonal (R-T) phases coexist. Specifically, the ceramic density reached its highest value (4.22 g/cm3), the electromechanical coupling coefficients kp and kt were 0.46 and 0.50, respectively, and the piezoelectric coefficient d33 was 245 pC/N.

Dielectric and Piezoelectric Properties of Niobium-modified BiInO3–PbTiO3 Perovskite Ceramics with High Curie Temperatures

2005 ◽  
Vol 20 (8) ◽  
pp. 2067-2071 ◽  
Author(s):  
Shujun Zhang ◽  
Ru Xia ◽  
Clive A. Randall ◽  
Thomas R. Shrout ◽  
Runrun Duan ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Dielectric Loss ◽  
Curie Temperature ◽  
Piezoelectric Coefficient ◽  
Elevated Temperatures ◽  
Piezoelectric Properties ◽  
Perovskite Phase ◽  
Perovskite Ceramics ◽  
Curie Temperatures ◽  
Dielectric And Piezoelectric Properties

Piezoelectric ceramics with TC > 500 °C were projected in the perovskite BiInO3–PbTiO3 (BIPT) system based on their low tolerance factor (∼0.884). However, a stable perovskite phase could be synthesized only when the PbTiO3 (PT) content was greater than 75%. Furthermore, the large tetragonality (c/a > 1.08) and low electrical resistivity made the ceramics difficult to pole. Niobium-modified BIPT ceramics with PT contents of 80% and 85% were found to possess significantly lower dielectric loss at elevated temperatures, making it possible to polarize the materials. Piezoelectric properties were measured for a BIPT85–1.5 mol% Nb composition with a Curie temperature of 542 °C; the longitudinal piezoelectric coefficient and coercive field were found to be 60 pC/N and 125 kV/cm, respectively.

scholarly journals Dielectric and Piezoelectric Properties of Textured Lead-Free Na0.5Bi0.5TiO3-Based Ceramics

Crystals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 206 ◽  
Author(s):  
Nannan Dong ◽  
Xiaoyi Gao ◽  
Fangquan Xia ◽  
Hanxing Liu ◽  
Hua Hao ◽  
...  
Keyword(s):  
Grain Orientation ◽  
Applied Field ◽  
Piezoelectric Coefficient ◽  
Piezoelectric Properties ◽  
Large Signal ◽  
Lower Strain ◽  
Textured Ceramics ◽  
Domain Configuration ◽  
Template Grain Growth ◽  
Dielectric And Piezoelectric Properties

This work provides a comparative study of the dielectric and piezoelectric properties of randomly oriented and textured 0.88Na0.5Bi0.5TiO3-0.08K0.5Bi0.5TiO3-0.04BaTiO3 (88NBT) ceramics. Textured ceramics were fabricated by template grain growth (TGG) method using NaNbO3 (NN) for templates. For textured ceramics with 4 wt% NN templates, a Lotgering factor of 96% and piezoelectric coefficient d33 of 185 pC/N were obtained. Compared to the randomly oriented ceramics, textured ceramics show lower strain hysteresis (H = 7.6%), higher unipolar strain of 0.041% with corresponding large signal piezoelectric coefficient d33* of 200 pm/V at applied field of 2 kV/mm. This enhancement can be explained by the grain orientation along <001> direction by texturing, where an engineered domain configuration is formed after polarization, leading to decreased hysteresis and increased piezoelectric property.

scholarly journals Studies of dielectric and piezoelectric properties of PbTi0.8−x Te0.2GdxO3 nano ceramics prepared by high energy ball milling

2019 ◽  
Vol 09 (02) ◽  
pp. 1950017
Author(s):  
S. K. Sinha ◽  
S. Kumari ◽  
R. K. Chaudhary
Keyword(s):  
Single Phase ◽  
Piezoelectric Coefficient ◽  
Piezoelectric Properties ◽  
High Energy ◽  
Poling Field ◽  
Energy Ball ◽  
Similar Kind ◽  
Dielectric And Piezoelectric Properties ◽  
Better Than

Incorporation of Te and Gd were done based on the stoicheometric formula PbTi[Formula: see text] Te[Formula: see text]GdxO3 (PTTeG). TG characterization of green powder revealed the completion of solid state reaction at temperature 450∘ C. XRD of modified PTTeG powders milled for 10[Formula: see text]h was found most suitable as it gives pure single-phase tetragonal structure. Dielectric constant was found as 2543 at curie temperature of 480∘C in the case of 5[Formula: see text]wt.% of Gd in PTTeG. Piezoelectric Coefficient was found as 241 [Formula: see text] 10 [Formula: see text] C/N at 39[Formula: see text]Kv/cm of poling field. The results obtained were comparable and even better than so far reported in similar kind of materials.

Erbium Alloyed Aluminum Nitride Films for Piezoelectric Applications

2008 ◽  
Vol 1129 ◽  
Author(s):  
A. Kabulski ◽  
V. R. Pagán ◽  
D Korakakis
Keyword(s):  
Rare Earth ◽  
Aluminum Nitride ◽  
Lead Zirconate Titanate ◽  
Piezoelectric Coefficient ◽  
Piezoelectric Properties ◽  
Piezoelectric Materials ◽  
Piezoelectric Response ◽  
Rare Earth Doping ◽  
Aln Film ◽  
The Impact

AbstractAluminum nitride (AlN) films have been explored for sensor and actuator applications, but the resultant piezoelectric coefficient is still too low to make the films more competitive with more commonly used piezoelectric materials such as lead zirconate titanate (PZT). While AlN does have the disadvantage of a lower piezoelectric response, it does have the ability to maintain its piezoelectric properties above 400°C, something that is not possible with other piezoelectric materials. It is desirable to achieve a larger piezoelectric response for AlN in order to facilitate the integration of nitride based devices into existing technologies but conventional methods of improving the response by growing higher quality film only result in slight improvements in the piezoelectric response. A method of improving the d33 piezoelectric coefficient beyond any values found in literature may be possible by exploring methods of improving PZT films.Rare earth doping has been reported to improve the piezoelectric properties of PZT resulting in significant increases in the piezoelectric coefficient. Research has been conducted using rare earth dopants to improve upon the optical properties of AlN, but the impact on piezoelectric effect has never been considered.Thin, 250-1000 nm, AlN:Er films have been reactively sputtered using erbium (Er)/aluminum alloyed targets to explore any improvement in piezoelectric properties of the AlN:Er films as compared to AlN films. AlN films with 0.5 and 1.5% Er concentrations have been found to have piezoelectric coefficients that are larger than comparable ‘Er-free’ AlN films. AlN films with only 0.5% Er quantities were found to increase the d33 coefficient compared to a similar AlN film depending on the thickness of the film. This increase results in d33,f values greater than 7pm/V which is larger than most values found in literature. By increasing the Er content to 1.5%, values of d33,f were found to be as large as 15 pm/V. This enhanced piezoelectric response is still lower than that of PZT, but can be used to create superior actuator devices than that of typical AlN films.

Dielectric and piezoelectric properties of porous PZT–PCN ceramics sintered at different temperatures

2015 ◽  
Vol 151 ◽  
pp. 85-88 ◽  
Author(s):  
Firas Fouad Abdullah ◽  
Ali Nemati ◽  
Reza Bagheri
Keyword(s):  
Piezoelectric Properties ◽  
Different Temperatures ◽  
Dielectric And Piezoelectric Properties ◽  
Porous Pzt

scholarly journals Temperature and frequency dependence of the dielectric and piezoelectric response of P(VDF–TrFE)/CoFe2O4 magnetoelectric composites

2017 ◽  
Vol 57 (2) ◽  
Author(s):  
Šarūnas Svirskas ◽  
Jaroslavas Belovickis ◽  
Daumantas Šemeliovas ◽  
Pedro Martins ◽  
Senentxu Lanceros-Méndez ◽  
...  
Keyword(s):  
Polyvinylidene Fluoride ◽  
Piezoelectric Coefficient ◽  
Piezoelectric Properties ◽  
Piezoelectric Response ◽  
Free Standing ◽  
Host Matrix ◽  
Practical Applications ◽  
Electromechanical Responses ◽  
Different Temperatures ◽  
Multiferroic Films

CoFe2O4 nanoparticles embedded in polyvinylidene fluoride–trifluoroethylene (P(VDF–TrFE)) matrix show suit­able properties for practical applications as piezoelectric and magnetoelectric transducers. The knowledge about the dielectric and electromechanical responses of the multiferroic films in a broad frequency and temperature range is essential for applicability. The purpose of this work is to investigate the dielectric, ferroelectric and piezoelectric properties of multiferroic composites based on P(VDF–TrFE) as a host matrix and CoFe2O4 as a magnetic filler. Free-standing films with a different concentration of the filler were investigated. The polarization switching was demonstrated for all the compositions. The polarization displacement hysteresis was achieved at different temperatures. The piezoelectric coefficient d33 is not affected by different concentration of ferrite. On the other hand, the composition with the largest weight % of CoFe2O4 shows higher coercive fields which is not favourable for applications. This indicates that the optimal content of the filler must be determined and taken into account when optimizing both ferroelectric and magnetoelectric properties.

Sign in / Sign up

Export Citation Format

Share Document