Fabrication and Characterization of Li2O Excess (Na0.49K0.49Li0.02)(Nb0.8Ta0.2)O3 Piezoelectric Ceramics

2008 ◽  
Vol 368-372 ◽  
pp. 1902-1904
Author(s):  
Min Soo Kim ◽  
Sin Woong Kim ◽  
Soon Jong Jeong ◽  
Jae Sung Song
Keyword(s):  
Electrical Properties ◽  
Piezoelectric Coefficient ◽  
Piezoelectric Ceramics ◽  
Coupling Factor ◽  
Special Technique ◽  
Sintering Process ◽  
Mechanical Coupling ◽  
Conventional Sintering ◽  
Fabrication And Characterization

Dense Li2O excess (Na0.49K0.49Li0.02)(Nb0.8Ta0.2)O3 [NKLNT] ceramics were developed by conventional sintering process without any special technique. The electrical properties of NKNLT ceramics were investigated as a function of Li2O concentration. When the sample sintered at 1050 oC for 4 h with the addition of 1 mol% Li2O, electro-mechanical coupling factor (kP) and piezoelectric coefficient (d33) were found to reach the highest values of 0.42 and 260 pC/N, respectively.

Low Temperature Sintering in 95(Na0.5K0.5)NbO3-5LiTaO3 Ceramics

2007 ◽  
Vol 124-126 ◽  
pp. 735-738 ◽  
Author(s):  
Min Soo Kim ◽  
Seok Oh ◽  
Dae Su Lee ◽  
Eon Cheol Park ◽  
Soon Jong Jeong ◽  
...  
Keyword(s):  
Grain Growth ◽  
Electromechanical Coupling ◽  
Piezoelectric Coefficient ◽  
Interface Reaction ◽  
Electromechanical Coupling Factor ◽  
Coupling Factor ◽  
Sintering Process ◽  
Sintering Aid ◽  
Conventional Sintering ◽  
Na2o Addition

Na2O excess 95(Na0.5K0.5)NbO3-5LiTaO3 (NKN-5LT) ceramics were developed by conventional sintering process. Sintering temperature was lowered by adding Na2O as a sintering aid. Grain growth behaviors with Na2O addition were explained in terms of the effect of Na2O on interface reaction - controlled grain growth and the critical driving force. The electrical properties of NKN-5LT ceramics were investigated as a function of Na2O concentration. In the 1 mol% Na2O excess NKN-5LT samples sintered at 1000oC for 4h in air, electromechanical coupling factor (kP) and piezoelectric coefficient (d33) of NKN-5LT ceramics were found to reach the highest values of 0.43 and 190 pC/N, respectively.

Fabrication and Characterization of Bioactive Glass Reinforced CaSiO3 Ceramics

2007 ◽  
Vol 330-332 ◽  
pp. 181-184 ◽  
Author(s):  
Kai Li Lin ◽  
Si Yu Ni ◽  
Jiang Chang ◽  
Wan Yin Zhai ◽  
Wei Ming Gu
Keyword(s):  
Mechanical Strength ◽  
Bioactive Glass ◽  
Bending Strength ◽  
Pressureless Sintering ◽  
Sintering Process ◽  
Optimum Amount ◽  
Bone Implant ◽  
Osteoblast Adhesion ◽  
Fabrication And Characterization

fabricated by pressureless sintering process. The effect of BG on the sintering ability and mechanical strength of the ceramics, and the adhesion and proliferation of osteoblasts were investigated. The results showed that the optimum amount of BG was 20wt.% and the samples sintered at 1100oC for 5h revealed a bending strength of 172 MPa, which was approximately 2-times higher than that of the pure CaSiO3 ceramics. The cell experiments showed that BG reinforced CaSiO3 ceramics supported osteoblast adhesion and possessed higher proliferation than that of the pure CaSiO3 ceramics, which indicated excellent biocompatibility. Our results suggested that BG reinforced CaSiO3 ceramics could be potential candidates as bioactive bone implant materials.

(1-x)(K0.475Na0.475Li0.05)(Nb0.975Sb0.025)O3-xBiFeO3 Lead-Free Piezoelectric Ceramics with CuO Sintering Aid

2011 ◽  
Vol 687 ◽  
pp. 228-232
Author(s):  
Yong Jie Zhao ◽  
Yu Zhen Zhao ◽  
Rong Xia Huang ◽  
Rong Zheng Liu ◽  
He Ping Zhou
Keyword(s):  
Electrical Properties ◽  
Electromechanical Coupling ◽  
Piezoelectric Materials ◽  
Piezoelectric Ceramics ◽  
Electromechanical Coupling Factor ◽  
Coupling Factor ◽  
Mechanical Quality Factor ◽  
Lead Free ◽  
X Ray Diffraction ◽  
Diffraction Patterns

(1-x) (K0.475Na0.475Li0.05)(Nb0.975Sb0.025)O3-xmolBiFeO3 (x=0, 0.002, 0.004, 0.006, 0.008) doped with 0.8mol%CuO lead-free piezoelectric ceramics were prepared by the solid state reaction technique. X-ray diffraction patterns suggested that all the ceramics presented perovskite structure. The compositional dependence of the phase structure and the electrical properties of the ceramics were studied. The ceramic (x=0.002) near room temperature exhibited excellent electrical properties (piezoelectric constant d33=172pC/N, planar electromechanical coupling factor kp=0.43, and dielectric constant =418). A relatively high mechanical quality factor (Qm=200) was also obtained in this particular composition. All these results revealed that this system might become a promising candidate for lead-free piezoelectric materials.

Investigation on Electrical Properties of CaCu3Ti4O12-Modified (Na,Bi)TiO3-BaTiO3 Lead Free Piezoceramics

2014 ◽  
Vol 887-888 ◽  
pp. 289-293
Author(s):  
Jing Chang Zhao ◽  
Zhen Lai Zhou
Keyword(s):  
Electrical Properties ◽  
Electromechanical Coupling ◽  
Piezoelectric Properties ◽  
Piezoelectric Ceramics ◽  
Electromechanical Coupling Factor ◽  
Coupling Factor ◽  
Mechanical Quality Factor ◽  
Lead Free ◽  
Lead Free Ceramics ◽  
Structure Morphology

(Na,Bi)TiO3-BaTiO3lead free piezoelectric ceramics were fabricated with modification of CaCu3Ti4O12additives. The phase structure, morphology, dielectric and piezoelectric properties of prepared samples were investigated, respectively. It was found that CaCu3Ti4O12additives evidently improve the polarization properties of (Na,Bi)TiO3-BaTiO3lead free ceramics and the obtained samples exhibit an excellent piezoelectric properties (electromechanical coupling factorKp=31%, mechanical quality factorQm=151 and piezoelectric constantd33=160pC/N). According to results, the effect of CaCu3Ti4O12additives on electrical properties of (Na,Bi)TiO3-BaTiO3lead free piezoelectric ceramics is discussed.

Fabrication and Characterization of Niobate Piezoelectric Ceramics with Sintering Aids

2009 ◽  
Vol 385 (1) ◽  
pp. 6141-6148 ◽  
Author(s):  
Ruiping Wang ◽  
Souichi Shibusawa ◽  
Noboru Miura ◽  
Hiroshi Bando ◽  
Mitsuru Itoh
Keyword(s):  
Piezoelectric Ceramics ◽  
Sintering Aids ◽  
Fabrication And Characterization
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