scholarly journals Piezoelectric Properties and Microstructure of (K,Na)NbO3– KTiNbO5 Composite Lead-Free Piezoelectric Ceramic

10.5772/62869 ◽  
2016 ◽  
Author(s):  
Kazushige Ohbayashi
Keyword(s):  
Piezoelectric Ceramic ◽  
Piezoelectric Properties ◽  
Lead Free

scholarly journals Evaluate the factors affecting the calcined temperatures of the BZT-BCT ceramics

2020 ◽  
Vol 129 (1D) ◽  
Author(s):  
Nguyen Thi Tuyet Trinh ◽  
Bui Thi Ngoc Anh ◽  
Le Tran Uyen Tu ◽  
Dung Thi Hoai Trang ◽  
Le Thi Lien Phuong ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Piezoelectric Ceramic ◽  
Piezoelectric Properties ◽  
Sintering Temperature ◽  
Ceramic Technology ◽  
Lead Free ◽  
Sintering Aid ◽  
Factors Affecting

Lead-free piezoelectric ceramic 0.48Ba[Zr0.2Ti0.8]O3 - 0.52[Ba0.7Ca0.3]TiO3 (BZT-BCT) with a nanostructure was manufactured by traditional ceramic technology. Nanostructure and the sintering aid reduce the calcinating temperature as well as the sintering temperature and some electrical properties of BZT-BCT ceramics systems are researched. The results show that they can reduce the calcinating and sintering temperatures of ceramics systems from 1250 0C and 1450 0C to 1170 0C and 1350 0C. Moreover, the piezoelectric properties of the 0.48BZT - 0.52BCT at the optimal calcinating and sintering temperature will be discussed in detail.

Improvement of the piezoelectric properties in (K,Na)NbO3-based lead-free piezoelectric ceramic with two-phase co-existing state

2015 ◽  
Vol 117 (21) ◽  
pp. 214102 ◽  
Author(s):  
H. Yamada ◽  
T. Matsuoka ◽  
H. Kozuka ◽  
M. Yamazaki ◽  
K. Ohbayashi ◽  
...  
Keyword(s):  
Piezoelectric Ceramic ◽  
Piezoelectric Properties ◽  
Lead Free ◽  
Two Phase

Dielectric, Piezoelectric and Ferroelectric Properties of (1-x)K0.5Na0.5NbO3–xBiGaO3 Lead-Free Ceramics

2013 ◽  
Vol 634-638 ◽  
pp. 2345-2348 ◽  
Author(s):  
Hong Mei Zhang ◽  
Shao Bo Qu ◽  
Jing Bo Zhao ◽  
Hong Liang Du
Keyword(s):  
Solid State ◽  
Electrical Properties ◽  
Piezoelectric Ceramic ◽  
Room Temperature ◽  
Piezoelectric Properties ◽  
Ferroelectric Properties ◽  
Lead Free ◽  
Practical Applications ◽  
Lead Free Ceramics ◽  
Solid State Sintering

(1-X)K0.5Na0.5NbO3–xBiGaO3[(1-X)KNN-Xbg] Lead-Free Ceramics with Different Additive of Bigao3 Were Synthesized by Conventional Solid-State Sintering Technique. Dielectric, Piezoelectric and Ferroelectric Properties of (1-X)KNN-Xbg Lead-Free Ceramics Were Studied. it Is Found that the Piezoelectric Properties Was Improved due to the Additive Bigao3，The Ceramics X=0.01 near Room Temperature Exhibit Excellent Electrical Properties D33=152pC/N, TC=372 °C. these Results Indicate that Bigao3 Adjusted K0.5Na0.5NbO3-Based Ceramics Materials Are Promising Lead-Free Piezoelectric Ceramic Candidates for Practical Applications.

Piezoelectric and Dielectric Properties of (Bi0.5Na0.5)TiO3- (Bi0.5K0.5)TiO3-BaTiO3 Lead-Free Piezoelectric Ceramics

2007 ◽  
Vol 336-338 ◽  
pp. 54-57 ◽  
Author(s):  
Zhi Wu Chen ◽  
Zhen Ya Lu
Keyword(s):  
Dielectric Properties ◽  
Ternary System ◽  
Piezoelectric Ceramic ◽  
Electromechanical Coupling ◽  
Piezoelectric Properties ◽  
Density Ratio ◽  
Electromechanical Coupling Factor ◽  
Coupling Factor ◽  
Lead Free ◽  
High Density Ratio

A lead-free piezoelectric ceramic ternary system based on (Bi0.5Na0.5)TiO3 (BNT)-(Bi0.5 K0.5)TiO3(BKT)-BaTiO3(BT) near the morphotropic phase boundary (MPB) between the tetragonal and rhombohedral phases has been investigated. The samples were prepared by a conventional sintering technique. Piezoelectric properties, dielectric properties and microstructures of BNT-BKT-BT lead-free piezoelectric ceramic were studied. The X-ray diffraction (XRD) patterns show that the ceramics possess a single-phase perovskite structure. The measurements of piezoelectric properties reveal that this system has a relatively high piezoelectric performance: the piezoelectric constant d33 reached to 178pC/N and planar electromechanical coupling factor kp enhanced to 0.325. The BNT-BKT-BT ternary system ceramics could be well sintered at 11500C with a high-density ratio of more than 95% of the theoretical density.

scholarly journals Sintering Mechanism and Enhanced Piezoelectric and Crystal Structural Properties of (1-x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 Lead Free Ceramics

2021 ◽  
Author(s):  
Yoo-Young Oh ◽  
Jung-Hyuk Koh
Keyword(s):  
Activation Energy ◽  
Piezoelectric Ceramic ◽  
Piezoelectric Properties ◽  
Sintering Temperature ◽  
Stoichiometric Composition ◽  
Industrial Applications ◽  
Lead Free ◽  
Process Conditions ◽  
Sintering Process ◽  
Temperature Dependent

Abstract As an lead-free piezoelectric ceramic of (1-x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3(here after (1-x)BZT-xBCT) has been investigated for functional devices applications. To employ as piezoelectric functional devices applications, lead-free materials with high piezoelectric charge coefficient and voltage coefficient can be indispensable for industrial applications. Piezoelectric ceramic specimens tend to shrink their size in the sintering process without melting. We focused on this phenomenon as a unique characteristic of piezoelectric ceramic materials and derived activation energy from this phenomenon using Arrhenius equation. Then associate this activation energy with piezoelectric and crystalline properties varied by sintering temperature and chemical stoichiometric composition. Piezoelectric properties can be changed depending on the sintering temperature and process conditions. (1-x)BZT-xBCT ceramics showed the highest piezoelectric coefficient of 470 pC/N. Crystalline properties and piezoelectric properties can be influenced by the sintering temperature and holding times. In this research, sintering temperature dependent structural and dielectric properties were investigated. Sintering temperature dependent shrinkage rate and activation energy were estimated and calculated for the various sintering process. In this research, two different activation energies for the shrinkage process were estimated

Improvement of (K,Na)NbO3-based lead-free piezoelectric ceramics by asymmetric octahedra

2016 ◽  
Vol 4 (41) ◽  
pp. 9756-9761 ◽  
Author(s):  
Hisashi Kozuka ◽  
Hideto Yamada ◽  
Takayuki Matsuoka ◽  
Kazuaki Kitamura ◽  
Masato Yamazaki ◽  
...  
Keyword(s):  
Piezoelectric Ceramic ◽  
Piezoelectric Properties ◽  
Piezoelectric Ceramics ◽  
Lead Free

Due to their excellent piezoelectric properties, including a kp = 0.55, εT33/ε0 = 2725, d33 = 375 pC N−1, 0.891 KNaCLN–0.041NTK–0.055BZ–0.0016Co3O4–0.0025Fe2O3–0.0069ZnO ceramic without Ta, Sb, Bi, or Hf is promising as a lead-free piezoelectric ceramic.

Effect of LiSbO3 Content on the Microstructure and Piezoelectric Properties of K0.5Na0.5NbO3 Lead-free Ceramics Doped with BiMnO3

2013 ◽  
Vol 28 (3) ◽  
pp. 321-325
Author(s):  
Min-Hong JIANG ◽  
Xin-Yu LIU ◽  
Guo-Hua CHEN ◽  
Gui-Sheng ZHU ◽  
Ji-Wen XU ◽  
...  
Keyword(s):  
Piezoelectric Properties ◽  
Lead Free ◽  
Lead Free Ceramics
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