Electrical properties of a lead-free perovskite ceramic: (Na0.5Sb0.5)TiO3

Prasad, K.; Lily,; Kumari, Khushboo; Chandra, K. P.; Yadav, K. L.; Sen, Shrabanee

doi:10.1007/s00339-007-3989-6

Cited by 35 publications

(23 citation statements)

References 30 publications

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“…Figure 5(a) shows the microstructure of as-deposited film surface of sample G. It was found that granular BNT crystals (approximately 2 µm grain size) and tetrahedral Bi 2 O 3 crystals were generated on the substrate, and those Bi 2 O 3 crystals were dispersed all over the film surface. The Bi 2 O 3 impurity was more generated in the case of high Bi(NO 3 ) 3 concentrations. The generation of Bi 2 O 3 increased the thickness of deposited films, and however it has no contribution to the piezoelectric property of deposited films.…”

Section: Observation Of Synthesis Processmentioning

confidence: 95%

“…It was found that the film thickness tended to be large in the case of high Bi(NO 3 ) 3 concentrations. Figure 5(a) shows the microstructure of as-deposited film surface of sample G. It was found that granular BNT crystals (approximately 2 µm grain size) and tetrahedral Bi 2 O 3 crystals were generated on the substrate, and those Bi 2 O 3 crystals were dispersed all over the film surface.…”

Section: Observation Of Synthesis Processmentioning

confidence: 99%

“…In the hydrothermal synthesis of BNT films, hydrated bismuth nitrate [Bi(NO 3 ) 3 •5H 2 O, hereinafter referred to as Bi(NO 3 ) 3 ] and titanium oxide(TiO 2 ) were used as bismuth precursor and titanium precursor respectively, and sodium hydroxide(NaOH) was used as sodium precursor and mineralizer.…”

Section: Hydrothermal Synthesismentioning

confidence: 99%

“…The optimized synthesis condition was determined on the evaluation target of the calculated BNT content. Figures 8 and 9 show the correlation between the BNT content of deposited films and the Bi(NO 3 ) 3 and TiO 2 concentrations of starting solutions, respectively. In these two figures, fitting curves obtained by the least square method show that the BNT content reach a maximum at the Bi(NO 3 ) 3 and TiO 2 concentrations of 1.2 and 0.5 mol/l, respectively.…”

Section: Optimization Of Synthesis Conditionmentioning

confidence: 99%

“…Therefore, there is a great need to develop lead-free piezoelectric ceramics for replacing them. BNT, one of promising lead-free piezoelectric ceramics, belongs to the perovskite family (ABO3-type) with rhombohedral symmetry at ambient temperature (3) .…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Piezoelectric (Bi1/2Na1/2)TiO3 Films by a Hydrothermal Method

Kusukawa

2009

JMMP

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Thin films of lead-free piezoelectric ceramics (Bi 1/2 Na 1/2 )TiO 3 (abbreviated as BNT) were prepared on pure titanium substrates by a hydrothermal method. The properties of BNT films synthesized from the reaction solution with various contents of bismuth and titanium were investigated using SEM, EDX, XRD and other instruments. Moreover, the effects of the concentrations of starting materials on permittivity and piezoelectric effect of deposited BNT films were discussed. The results showed that an impurity of Bi 2 O 3 crystal was produced on the surfaces of all deposited films. With assumption of deposited films as an system of (1-x) (Bi 1/2 Na 1/2 )TiO 3 -xBi 2 O 3 , the BNT content was calculated from the Bi/Ti ratio of the EDX results. The optimized synthesis condition was determined on the evaluation target of the calculated BNT content. In addition, the unimorph cantilever type actuators were fabricated by BNT deposited samples, and their piezoelectric responses were measured at their resonance frequencies under AC field. It was noted that the piezoelectric effect of the deposited BNT film was greatly dependent on its crystallization level.

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Section: Observation Of Synthesis Processmentioning

confidence: 95%

Section: Observation Of Synthesis Processmentioning

confidence: 99%

Section: Hydrothermal Synthesismentioning

confidence: 99%

Section: Optimization Of Synthesis Conditionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Piezoelectric (Bi1/2Na1/2)TiO3 Films by a Hydrothermal Method

Kusukawa

2009

JMMP

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Electronic properties of polypyrrole based TiO₂ nanofiber composite

Tiwari

Atri

Sharma

2013

J of Applied Polymer Sci

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In this work, Polypyrrole (PPy), Titanium dioxide nanofiber (TiO2‐nf) are prepared by oxidative polymerization and hydrothermal process respectively. The PPy/TiO2‐nf composite is prepared by in situ oxidative polymerization in the presence of pyrrole monomer and TiO2‐nf. The nanocomposite and TiO2‐nf are then characterized by scanning electron microscopy (SEM) and energy dispersive X‐ray spectroscopy (EDX) techniques and XRD studies. Dielectric studies of PPy/TiO2‐nf composite is carried out in the frequency range of 1 KHz‐3 MHz at varying temperature and it shows anomalous behavior at 1MHz, where its value reaches to its minimum value of 13 at room temperature and this dip remains even at higher temperature. Impedance study is used to understand the grain and grain boundary effects of the material; frequency dependent ac conductivity has two regions separated at 1MHz, which is being explained by hopping conduction and Maxwell‐Wagner type mechanism, respectively. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2014, 131, 40036.

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