Preparation of Potassium Niobate-Coated Barium Titanate Accumulation Ceramics by Solvothermal Synthesis and Enhancement of Piezoelectric Property

2013 ◽  
Vol 566 ◽  
pp. 76-80 ◽  
Author(s):  
Kenta Yamashita ◽  
Shigehito Shimizu ◽  
Nobuhiro Kumada ◽  
Kouichi Nakashima ◽  
Ichiro Fujii ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Barium Titanate ◽  
Piezoelectric Property ◽  
Solvothermal Synthesis ◽  
Room Temperature ◽  
Piezoelectric Properties ◽  
Solvothermal Method ◽  
Potassium Niobate ◽  
Nanostructured Ceramics ◽  
Dielectric And Piezoelectric Properties

Barium titanate (BaTiO3, BT) - potassium niobate (KNbO3, KN) nanostructured ceramics with artificial morphotropic phase boundary (MPB) structure were successfully prepared at temperatures below 230 °C by solvothermal method. Various characterizations suggested that the BT-KN nanostructured ceramics exhibited a porosity of around 30 % and heteroepitaxial interface between BT and KN. Their dielectric and piezoelectric properties were measured at room temperature, and the dielectric constant and apparent piezoelectric constant estimated from slope of strain and electric field curve was 370 and 136 pm/V, respectively.

Electrical Properties of Bi(In,Ga,Sc)O3-PbTiO3 Piezoelectric Ceramics

2013 ◽  
Vol 364 ◽  
pp. 794-798 ◽  
Author(s):  
Yi Chen ◽  
Jian Guo Zhu ◽  
Ding Quan Xiao
Keyword(s):  
Dielectric Constant ◽  
High Temperature ◽  
Electrical Properties ◽  
Lead Titanate ◽  
Room Temperature ◽  
Electromechanical Coupling ◽  
Piezoelectric Properties ◽  
Electromechanical Coupling Coefficient ◽  
Piezoelectric Devices ◽  
Dielectric And Piezoelectric Properties

The gallium and indium double-modified bismuth scandate-lead titanate (1-x)Bi (In0.20Ga0.05Sc0.75)O3-xPbTiO3((1-x)BIGS-xPT,x=0.55-0.70) ceramics were prepared by using conventional ceramic technique. (1-x)BIGS-xPT ceramics for nearx=0.60 exhibits an evident enhancement in room temperature dielectric and piezoelectric properties, with dielectric constantε, piezoelectric constantd33, planar electromechanical coupling coefficientkpand Curie temperatureTCof 1100, 295 pC/N, 0.43 and 435 °C, respectively. TheTCof (1-x)BIGS-xPT is in the range of 425-530 °C for the compositions investigated. The combination of highTCand excellent piezoelectric activity suggest that the (1-x)BIGS-xPT ceramics are usable candidate materials for high temperature piezoelectric devices applications.

Preparation of Barium Titanate Porous Ceramics and their Piezoelectric Power Generation Property

2013 ◽  
Vol 566 ◽  
pp. 41-44
Author(s):  
Satoshi Wada ◽  
Yoshikazu Shimura ◽  
Petr Pulpan ◽  
Ichiro Fujii ◽  
Kouichi Nakashima
Keyword(s):  
Power Generation ◽  
Dielectric Constant ◽  
Barium Titanate ◽  
Piezoelectric Properties ◽  
Sintering Temperature ◽  
Porous Ceramics ◽  
Elastic Compliance ◽  
Conventional Sintering ◽  
Sintering Method ◽  
Dielectric And Piezoelectric Properties

Barium titanate (BaTiO3) porous ceramics were prepared by conventional sintering method, and their dielectric and piezoelectric properties were measured using 31-resonators. With decreasing sintering temperature, dielectric constant showed a maximum of 5500 at 1300 °C, while piezoelectric constant and elastic compliance increased. These resonators were developed to unimorph-type vibrators and their instantaneous electric powers were measured. As the results, the maximum electric power of 129 μW was measured for the BaTiO3porous ceramics sintered at 1200 °C, and this value was 20 times greater than that for dense BaTiO3ceramics.

Preparation of Barium Titanate-Coated Strontium Titanate Accumulation Ceramics by Solvothermal Synthesis and their Dielectric Property

2013 ◽  
Vol 566 ◽  
pp. 289-292
Author(s):  
Shogo Iwatsuki ◽  
Takayuki Goto ◽  
Masatoshi Kera ◽  
Kouichi Nakashima ◽  
Ichiro Fujii ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Dielectric Property ◽  
Barium Titanate ◽  
Strontium Titanate ◽  
Solvothermal Synthesis ◽  
Solvothermal Method ◽  
Hysteresis Loops

Solvothermally synthesized strontium titanate (SrTiO3, ST) or barium titanate (BaTiO3, BT) nanocubes were accumulated and the dielectric properties were studied. Initially, the BT or ST nanocubes were pressed into pellets. BT was deposited on the pellets by a solvothermal method. P-E hysteresis loops and S-E curves of BT-coated ST accumulation ceramics (BT on ST) showed ferroelectric responses. The dielectric constant of the accumulation ceramics was measured to be 70.6.

Microstructure Control of Barium Titanate – Potassium Niobate Solid Solution System Ceramics by MPB Engineering and their Piezoelectric Properties

2011 ◽  
Vol 485 ◽  
pp. 89-92 ◽  
Author(s):  
Shigehito Shimizu ◽  
Nobuhiro Kumada ◽  
Kouichi Nakashima ◽  
Ichiro Fujii ◽  
Daisuke Tanaka ◽  
...  
Keyword(s):  
Solid Solution ◽  
Room Temperature ◽  
Piezoelectric Properties ◽  
Potassium Niobate ◽  
Interface Area ◽  
Solution System ◽  
Solid Solution System ◽  
Conventional Sintering ◽  
Sintering Method ◽  
Dielectric And Piezoelectric Properties

Effect of the microstructural homogeneity of 0.5 BaTiO3 - 0.5 KNbO3 (0.5BT-0.5KN) solid solution ceramics on the dielectric and piezoelectric properties was investigated. Microstructure of a sample prepared by a conventional sintering method was homogenous, and the room temperature crystal structure was assigned to cubic Pm3m symmetry and therefore the sample was paraelectric. On the other hand, microstructure of samples prepared by a two-step sintering method was inhomogeneous, that is, it was made of BT and KN grains. The large electric field piezoelectric constant d33* increased with increasing interface area.

Preparation of Barium Titanate–Potassium Niobate Solid Solution System Ceramics and Their Piezoelectric Properties

2008 ◽  
Vol 47 (9) ◽  
pp. 7678-7684 ◽  
Author(s):  
Satoshi Wada ◽  
Momoyo Nitta ◽  
Nobuhiro Kumada ◽  
Daisuke Tanaka ◽  
Masahito Furukawa ◽  
...  
Keyword(s):  
Solid Solution ◽  
Barium Titanate ◽  
Piezoelectric Properties ◽  
Potassium Niobate ◽  
Solution System ◽  
Solid Solution System

Preparation of Potassium Niobate–Barium Titanate Ceramics Using Well-Dispersed Nanoparticles and their Dielectric Properties

2011 ◽  
Vol 485 ◽  
pp. 39-42 ◽  
Author(s):  
Kenta Yamashita ◽  
Shigehito Shimizu ◽  
Ichiro Fujii ◽  
Kouichi Nakashima ◽  
Nobuhiro Kumada ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Barium Titanate ◽  
Potassium Niobate ◽  
Conventional Sintering ◽  
Titanate Ceramics ◽  
Sintering Method

ANbO3– BaTiO3(A=K, Na, or K0.5Na0.5) system ceramics were prepared using a conventional sintering method, and their dielectric properties were investigated. It was found that the dielectric constant of KNbO3-BaTiO3and (K0.5Na0.5) NbO3- BaTiO3system ceramics did not strongly depend on temperature between 20 and 400 °C, making them useful for capacitor application.

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