High Piezoelectric Voltage Coefficient in Structured Lead-Free (K,Na,Li)NbO3Particulate-Epoxy Composites

2016 ◽  
Vol 99 (12) ◽  
pp. 3957-3963 ◽  
Author(s):  
Nijesh K. James ◽  
Daniella B. Deutz ◽  
Ranjita K. Bose ◽  
Sybrand van der Zwaag ◽  
Pim Groen
Keyword(s):  
Lead Free ◽  
Epoxy Composites ◽  
Voltage Coefficient ◽  
Piezoelectric Voltage

Niobate-based lead-free piezoceramics: a diffused phase transition boundary leading to temperature-insensitive high piezoelectric voltage coefficients

2018 ◽  
Vol 6 (5) ◽  
pp. 1116-1125 ◽  
Author(s):  
Qing Liu ◽  
Jing-Feng Li ◽  
Lei Zhao ◽  
Yichi Zhang ◽  
Jing Gao ◽  
...  
Keyword(s):  
Phase Transition ◽  
Thermal Stability ◽  
Lead Free ◽  
Thermally Stable ◽  
Transition Boundary ◽  
Diffused Phase Transition ◽  
Piezoelectric Voltage ◽  
Phase Transition Boundary

A large and thermally stable d33 was observed in dense and translucent KNN-based ceramics. Forming the R–O–T diffused phase transition is validated as a feasible way to realize the simultaneous enhancement of piezoelectricity and thermal stability.

Piezoelectric Voltage Constant and Sensitivity Enhancements Through Phase Boundary Structure Control of Lead-free (K,Na)NbO3-based ceramics

2021 ◽  
Author(s):  
Min-Ku Lee ◽  
Byung-Hoon Kim ◽  
Gyoung-Ja Lee
Keyword(s):  
Material Parameter ◽  
Perovskite Oxide ◽  
Lead Free ◽  
Boundary Structure ◽  
Voltage Sensitivity ◽  
Phase Boundaries ◽  
Accelerometer Sensor ◽  
Structure Control ◽  
Piezoelectric Charge ◽  
Piezoelectric Voltage

Abstract The piezoelectric voltage constant (g33) is a material parameter critical to piezoelectric voltage-type sensors for detecting vibrations or strains. Here, we report a lead-free (K,Na)NbO3 (KNN)-based piezoelectric accelerometer with voltage sensitivity enhanced by taking advantage of a high g33. To achieve a high g33, the magnitudes of piezoelectric charge constant d33 and dielectric permittivity er of KNN were best coupled by manipulating the intrinsic polymorphic phase boundaries effectively with the help of Bi-based perovskite oxide additives. For the KNN composition that derives benefit from the combination of er and d33, the value of g33 was found to be 46.9 ´ 10-3 V·m/N, which is significantly higher than those (20 - 30 ´ 10−3 V·m/N) found in well-known polycrystalline lead-based ceramics including commercial Pb(Zr,Ti)O3 (PZT). Finally, the accelerometer sensor prototype built using the modified KNN composition demonstrated higher voltage sensitivity (183 mV/g) when measuring vibrations, showing a 29% increase against the PZT-based sensor (142 mV/g).

scholarly journals Giant piezoelectric voltage coefficient in grain-oriented modified PbTiO3 material

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Yongke Yan ◽  
Jie E. Zhou ◽  
Deepam Maurya ◽  
Yu U. Wang ◽  
Shashank Priya
Keyword(s):  
Voltage Coefficient ◽  
Piezoelectric Voltage

Two-Dimensional Layered Perovskite Ferroelectric with Giant Piezoelectric Voltage Coefficient

2019 ◽  
Vol 142 (2) ◽  
pp. 1077-1082 ◽  
Author(s):  
Xiao-Gang Chen ◽  
Xian-Jiang Song ◽  
Zhi-Xu Zhang ◽  
Peng-Fei Li ◽  
Jia-Zhen Ge ◽  
...  
Keyword(s):  
Layered Perovskite ◽  
Two Dimensional ◽  
Voltage Coefficient ◽  
Piezoelectric Voltage

scholarly journals Piezoelectric Characteristics of 0.55Pb(Ni1/3Nb2/3)O3-0.45Pb(Zr,Ti)O3 Ceramics with Different MnO2 Concentrations for Ultrasound Transducer Applications

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4115 ◽  
Author(s):  
Myeongcheol Kang ◽  
Lae-Hyong Kang
Keyword(s):  
Dielectric Constant ◽  
Piezoelectric Ceramic ◽  
Electromechanical Coupling ◽  
Solid State Reaction Method ◽  
Electromechanical Coupling Coefficient ◽  
Ultrasound Transducers ◽  
Conventional Solid State Reaction ◽  
Voltage Coefficient ◽  
Piezoelectric Voltage ◽  
Piezoelectric Characteristics

In this study, we investigate the piezoelectric characteristics of 0.55Pb(Ni1/3Nb2/3)O3-0.45Pb(Zr,Ti)O3 (PNN-PZT) with MnO2 additive (0, 0.25, 0.5, 1, 2, and 3 mol%). We focus on the fabrication of a piezoelectric ceramic for use as both actuator and sensor for ultrasound transducers. The actuator and sensor properties of a piezoelectric ceramic depend on the piezoelectric strain coefficient d and piezoelectric voltage coefficient g, related as g = d/εT. To increase g, the dielectric constant εT must be decreased. PNN-PZT with MnO2 doping is synthesized using the conventional solid-state reaction method. The electrical properties are determined based on the resonant frequencies and vibration modes measured by using an impedance analyzer. The MnO2 addition initially improves the tetragonality of the PNN-PZT ceramic, which then saturates at a MnO2 content of 1 mol%. Therefore, the dielectric constant and piezoelectric coefficient d33 steadily decrease, while the mechanical properties (Qm, Young’s modulus), tanδ, electromechanical coupling coefficient k, and piezoelectric voltage coefficient g were improved at 0.5–1 mol% MnO2 content.

scholarly journals PZT/PLZT - elastomer composites with improved piezoelectric voltage coefficient

2018 ◽  
Vol 314 ◽  
pp. 012007
Author(s):  
K. Harikrishnan ◽  
D V Bavbande ◽  
Dhirendra Mohan ◽  
B Manoharan ◽  
M R S Prasad ◽  
...  
Keyword(s):  
Voltage Coefficient ◽  
Elastomer Composites ◽  
Piezoelectric Voltage

Dielectric and Magnetoelectric Properties of Nano-Microscale Lead-Free Composite by 0.4Co-Ferrite and 0.6(K0.5Na0.5)NbO3-Based Ferroelectric Matrix

2011 ◽  
Vol 80-81 ◽  
pp. 271-275
Author(s):  
You Xiang Ye ◽  
Sheng Hua Zhou ◽  
Yun Zhou
Keyword(s):  
Ferroelectric Materials ◽  
Lead Free ◽  
X Ray Diffraction ◽  
X Ray ◽  
Magnetoelectric Composites ◽  
Voltage Coefficient ◽  
Materials Used ◽  
Couple Effect ◽  
Very High ◽  
Potential Use

Lead-free multiferroic magnetoelectric composites were prepared by incorporating the dispersed 0.4CoFe2O4ferromagnetic nanoparticles into 0.6(K0.5Na0.5)NbO3-LiSbO3ferroelectric micromatrix. From the x-ray diffraction analysis, it was observed that almost no chemical reaction occurs between the ferrite and the ferroelectric materials used to form the composite. Dielectric properties as a function of frequency were measured. The magnetoelectric couple effect was given as a function of magnetic field with a maximum magnetoelectric voltage coefficient of 15.01mV·cm-1·Oe-1at 1kHz, which was a very high value in the lead-free magnetoelectric composites system for the potential use on actuators and sensors, etc.

Simultaneously enhanced piezoelectric response and piezoelectric voltage coefficient in textured KNN-based ceramics

2017 ◽  
Vol 101 (1) ◽  
pp. 265-273 ◽  
Author(s):  
Baihui Liu ◽  
Peng Li ◽  
Bo Shen ◽  
Jiwei Zhai ◽  
Yang Zhang ◽  
...  
Keyword(s):  
Piezoelectric Response ◽  
Voltage Coefficient ◽  
Piezoelectric Voltage
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