Piezoelectric and dielectric properties of La2O3 added Bi(Na, K)TiO3–SrTiO3 ceramics for pressure sensor application

Yoo, Juhyun; Hong, Jae-Il; Lee, Hyunseok; Jeong, Yeong-Ho; Lee, Byungyoul; Song, Hyun-Seon; Kwon, Jun-Sik

doi:10.1016/j.sna.2005.09.005

Cited by 38 publications

(25 citation statements)

References 5 publications

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“…Recent reports on lead-free piezoelectrics can be categorized into two main perovskite families: (1) K 0.5 Na 0.5 NbO 3 (KNN), and (2) Na 0.5 Bi 0.5 TiO 3 (NBT) [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. Room temperature values of the dielectric, piezoelectric, and electromechanical properties have been compiled and tabulated in Table 1.…”

Section: Lead-free Piezoelectricsmentioning

confidence: 99%

Lead-free piezoelectric ceramics vs. PZT?

2007

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Investigations in the development of lead-free piezoelectric ceramics have recently claimed properties comparable to that of PZT-based materials. In this work, the dielectric and piezoelectric properties of the various systems were contrasted in relation to their respective Curie temperatures. Analogous to PZT, enhanced properties are noted for morphotropic phase boundary (MPB) compositions in the Na,BiTiO 3 -BaTiO 3 and the ternary system with K,BiTiO 3 , but offer properties significantly lower than that of PZTs. The consequence of a ferroelectric to antiferroelectric transition well below T C further limits their usefulness. Though comparable with respect to T C , enhanced properties reported in the K,NaNbO 3 family are the result of increased polarizability associated with the T orthor-tetragonal polymorphic phase transition being compositionally shifted downward and not from a MPB as widely reported. As expected, the properties are strongly temperature dependent unlike that observed for MPB systems.

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Section: Lead-free Piezoelectricsmentioning

confidence: 99%

Lead-free piezoelectric ceramics vs. PZT?

2007

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“…[8][9][10][11][12] Other studies focused on either A-and/or B-site doping to improve small and large signal electromechanical properties. [13][14][15][16] It was proved that either replacing Bi on the A-site 16 or all A-site cations are effective approaches. 13 Compositional modifications with iso-and aliovalent dopants are technologically relevant because small doping amounts can modify considerably electrical properties due to cation vacancy formation and chemical pressure.…”

Section: Introductionmentioning

confidence: 99%

Tailoring ergodicity through selective A-site doping in the Bi1/2Na1/2TiO3–Bi1/2K1/2TiO3 system

Acosta

Liu

Deluca

et al. 2015

Journal of Applied Physics

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Articles you may be interested inSolid-state conversion of (Na1/2Bi1/2)TiO3-BaTiO3-(K1/2Na1/2)NbO3 single crystals and their piezoelectric properties Appl. Phys. Lett. 104, 222910 (2014) The morphotropic phase boundary composition Bi 1/2 Na 1/2 TiO 3 -20 mol. % Bi 1/2 K 1/2 TiO 3 was chosen as initial material to do selective A-site aliovalent doping replacing Na and K by 1 at. % La, respectively. The materials were studied macroscopically by measuring dielectric and electromechanical properties. The Na-replaced material has a lower freezing temperature T fr , lower remanent polarization and remanent strain, and thus a higher degree of ergodicity than the K-replaced material. These results are contrasted with local poling experiments and hysteresis loops obtained from piezoresponse force microscopy. The faster relaxation of the tip-induced local polarization and the lower remanent state in bias-on and -off loops confirm the higher degree of ergodicity of the Na-replaced material. The difference in functional properties is attributed to small variations in chemical pressure achieved through selective doping. Raman results support this working hypothesis. V C 2015 AIP Publishing LLC.[http://dx

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“…Although BNBT-x ceramics possess good piezoelectric properties near the MPB, the gap is still existent comparing with PZT. To further enhance the properties of BNBT-x ceramics, some additions have been used for the specific application [10][11][12][13][14][15][16]. Pengpat K [12] reported the effect of La 2 O 3 additive on piezoelectric properties of BNBT-x ceramics.…”

Section: Introductionmentioning

confidence: 99%

Effects of MnO2 addition on microstructure and electrical properties of (Bi0.5Na0.5) 0.94Ba0.06TiO3 ceramics

Wang

Quanlu

2007

J Electroceram

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In this letter, MnO 2 -doped (Bi 0.5 Na 0.5 ) 0.94 Ba 0.06-TiO 3 (BNBT-6) lead-free piezoelectric ceramics were synthesized by solid state reaction, and the microstructure and electrical properties of the ceramics were investigated. X-ray diffraction (XRD) reveals that all specimens take on single perovskite type structure, and the diffraction peaks shift to a large angle as the MnO 2 addition increases. Scanning electron microscopy shows that the grain sizes increases, and then decreases with increasing the MnO 2 content. The experiment results indicate that the electrical properties of ceramics are significantly influenced by the MnO 2 content, and the ceramics with homogeneous microstructure and excellent electrical properties are obtained with addition of 0.3 wt% MnO 2 and sintered at 1160°C. The piezoelectric constant (d 33 ), the electromechanical coupling factor (k p ), the dissipation factor (tan δ) and the dielectric constant (ɛ r ) reach 160 pC/N, 0.29, 0.026 and 879, respectively. These excellent properties indicate that the MnO 2 -doped BNBT-6 ceramics can be used for actuators.

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Piezoelectric and dielectric properties of La2O3 added Bi(Na, K)TiO3–SrTiO3 ceramics for pressure sensor application

Cited by 38 publications

References 5 publications

Lead-free piezoelectric ceramics vs. PZT?

Lead-free piezoelectric ceramics vs. PZT?

Tailoring ergodicity through selective A-site doping in the Bi1/2Na1/2TiO3–Bi1/2K1/2TiO3 system

Effects of MnO2 addition on microstructure and electrical properties of (Bi0.5Na0.5) 0.94Ba0.06TiO3 ceramics

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