Sol–gel synthesis and characterization of BaTiO3-doped (Bi0.5Na0.5)TiO3 piezoelectric ceramics

Cernea, Marin; Andronescu, Ecaterina; Radu, Roxana; Fochi, Fabio; Galassi, Carmen

doi:10.1016/j.jallcom.2009.10.140

Cited by 101 publications

(48 citation statements)

References 38 publications

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“…The mixing of (Sol-1) and (Sol-2) with oxalic acid at stoichiometric ratio was done under warm conditions, and with stirring at 90 C/15 min. Then a gradual dropping of 10 M solution of sodium hydroxide was added to the oxalate solution with continuous stirring at 90 C/ 72 h. [7][8][9][10] The resultant powder was washed and filtered for five times with distilled water, then characterized by X-ray diffraction XRD analysis. The steps for preparation of BNT via a hydrothermal process is shown in Fig.…”

Section: Experimental Workmentioning

confidence: 99%

Dielectric properties of BNT-xBT prepared by hydrothermal process

Mahmood

Al‐Shakarchi

2017

J. Adv. Dielect.

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The BNT ceramic sample might be a good replacement for PZT piezoelectric in industrial applications, especially in energy harvesting from crystal vibrations. In order to enhance the performance of BNT ceramic, the solid solution was chosen by substitution with Ba þ2 at Morphtropic Phase Boundary (MPB). The BNT-xBT powders with x ¼ 1, 0.07, 0.06 and 0 were prepared by the hydrothermal method with average particle size (65-150 nm) at (90 C/72 h). The ceramic disc was sintered at (1150 C/4 h) and showed excellent relative density of about 96%. The results of X-ray diffraction (XRD) confirmed the MPB for x ¼ 0:06 and 0.07, while the BNT had a rhombohedral structure and BT had a tetragonal structure. The dielectric measurements showed that BNT, BNT-7BT, BNT-6BT behave as the relaxator ferroelectric and showed a strong dependence on frequency, especially in the MPB region while BT behaves as a normal ferroelectric. Both the Curie temperature and depolarization temperature decrease at the MPB region and showed strong dependency on frequency.

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Section: Experimental Workmentioning

confidence: 99%

Dielectric properties of BNT-xBT prepared by hydrothermal process

Mahmood

Al‐Shakarchi

2017

J. Adv. Dielect.

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“…4 shows the relative density of the BNT-BST ceramics obtained at different sintering temperatures. The theoretical density of the BNT-BST ceramics can be calculated by the following equation [17]:…”

Section: Resultsmentioning

confidence: 99%

Effects of sintering temperature on the piezoelectric properties of (Bi,Na)TiO3-based composites for energy harvesting applications

Kwon

Lee

Koh

2015

Ceramics International

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“…A second mass decrease of 4% is recorded in 200-300°C temperature range, and this is accompanied by a weak endothermic peak in DTA curve, with the maximum at 274°C. This event can be assigned to decomposition and removal of residual nitrate groups from calcium nitrate used as precursor in the sol-gel synthesis process [16,17], as well as to pyrolysis of the residual organic component [18]. The further mass loss (7.6%) recorded up to about 570°C, without events in DTA curve, is related to dehydroxylation of the sample [19].…”

Section: Resultsmentioning

confidence: 99%

Gold nanoparticles developed in sol–gel derived apatite—bioactive glass composites

Simon

Lucacel

Radu

et al. 2012

J Mater Sci: Mater Med

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The study is focussed on synthesis and characterisation of a new sol-gel derived composite system consisting of nanocrystalline apatite, bioactive glass and gold nanoparticles, which are of interest both for regenerative medicine and for specific medical applications of the releasable gold nanoparticles. Samples dried at 110°C and then heat treated for 30 min at 300 and 500°C were investigated by thermal analysis (DTA/TG), X-ray diffraction (XRD), UV-VIS-NIR, Fourier Transform Infrared (FTIR) spectroscopy, X-ray Photoelectron(XPS) spectroscopy, Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). Gold nanoparticles and nanocrystalline apatite are developed already after heat treatment at 300°C. XPS analysis clearly revealed the presence of both metallic and ionic gold species. The development of gold nanoparticles was evidenced by UV-VIS-NIR and TEM analysis, and their size increased from few nanometers to 25 nm by increasing the treatment temperature from 300 to 500°C. The bioactivity of the samples immersed in simulated body fluid was demonstrated by XRD and SEM results.

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Sol–gel synthesis and characterization of BaTiO3-doped (Bi0.5Na0.5)TiO3 piezoelectric ceramics

Cited by 101 publications

References 38 publications

Dielectric properties of BNT-xBT prepared by hydrothermal process

Dielectric properties of BNT-xBT prepared by hydrothermal process

Effects of sintering temperature on the piezoelectric properties of (Bi,Na)TiO3-based composites for energy harvesting applications

Gold nanoparticles developed in sol–gel derived apatite—bioactive glass composites

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