Fabrication and dielectric properties of lead titanate nanocomposites

Wongmaneerung, R.; Rujiwatra, Apinpus; Yimnirun, Rattikorn; Ananta, Supon

doi:10.1016/j.jallcom.2008.07.074

Cited by 13 publications

(6 citation statements)

References 35 publications

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“…However, it is well known that pure PT ceramics are difficult to obtain because they break up into powders when they are cooled down through the Curie point, due to the large distortion of the tetragonal phase at room temperature (which is characterized by a c/a ratio of ∼1.06) [2,3]. Therefore, dielectric properties of PT ceramics are only available for porous and doped samples.…”

Section: Introductionmentioning

confidence: 99%

Dielectric properties of PbTiO3/ZnO ceramic nanocomposites obtained by solid-state reaction method

Wongmaneerung

Choopan

Yimnirun

et al. 2011

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Dielectric properties of PbTiO3/ZnO ceramic nanocomposites obtained by solid-state reaction method

Wongmaneerung

Choopan

Yimnirun

et al. 2011

Journal of Alloys and Compounds

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“…The prominent PbTiO 3 with the perovskite crystal structure possesses a relatively high Curie point of 490 C. The high c/a ratio in PbTiO 3 at low temperature confers tetragonal phase. So, it disintegrates into powder when cooled to the Curie point [9]. Various methods of PbTiO 3 nanopowder preparation, such as the conventional mixed-oxide method, Pechini-type processes, mechanochemical synthesis, hydrothermal process, sputtering, spray drying, and sol-gel processing have already been reported by some authors [10,11,12,13,14,15,16].…”

Section: Introductionmentioning

confidence: 99%

Ferroelectric behavior and spectroscopic properties of La-Modified lead titanate nanoparticles prepared by a sol-gel method

Mostafa

Alrowaili

Rashwan

et al. 2020

Heliyon

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A B S T R A C TThe sol-gel method was used to prepare perovskite type (Pb 1-1.5x La x □ 0.5x )TiO 3 (PLT) ceramics with x ¼ 0.21, 0.22, 0.23, 0.24, 0.25 in order to investigate their structural, optical, and dielectric properties. The crystallite compounds were obtained by calcinating the mixture of PbCO 3 , TiO 2 , and La 2 O 3 at 1000 C for different time periods. After 4 h annealing, PLT23 sample, approximately a very little secondary phases have been observed in the XRD spectrum of the PLT sample with 23% La content (PLT23). The presence of La dopants might have affected the tetragonality of the Lead titanate crystal structure. The PLT samples tolerance factor decreases from 0.991 as in x ¼ 0.21 to 0.986 for x ¼ 0.25. Hence, these structures tend, generally, to be in the perovskite phase as t~1. In the doped ceramics, characteristic phase transitions were shifted to lower temperatures. The dielectric permittivity value showed the tendency of a slight increase with lanthanum addition and achieved its maximum ε m (3649) at x ¼ 0.23, then it decreases for higher concentrations of La. The samples' estimated average crystallite size ranged from 40 nm to 50 nm, the maximum crystallite size about (49.6 nm) at x ¼ 0.23 La. The calculated bandgaps were 3.1, 3.26, 3.28, 3.08, and 3.12 for the PLT with 0.21, 0.22, 0.23,0.24 and 0.25% La, respectively.The Curie constant C was obtained as the slope of the curve of the inverse values of ε r vs. temperature. The highest C value (5.2 Â 10 5 K) was measured for the 23% La sample. The sample with 23% La content appears to be notably distinguished in its structural, optical, and dielectric characteristics compared with other samples.

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“…So it disintegrates into powder when cooled to the Curie point [7]. Some authors have already reported various methods of PbTiO3 nanopowder preparation, such as the conventional mixed-oxide method, Pechini-type processes, mechanochemical synthesis, hydrothermal process, sputtering, spray drying, and sol-gel processing [8][9][10][11][12][13][14]. Among these methods, the low-cost and simple sol-gel technique can precisely control the composition, making it more advantageous.…”

Section: Introductionmentioning

confidence: 99%

Ferroelectric Behavior and Spectroscopic Properties of La-Modified Lead Titanate Nanoparticles Prepared by a Sol-Gel Method

Mostafa¹,

Alrowaili²,

Rahwan³

et al. 2019

Preprint

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Perovskite type (Pb1-1.5x Lax0.5x)TiO3 (PLT) ceramics with x = 0.21, 0.22, 0.23, 0.24, 0.25 were prepared by the sol-gel method. Their structural, optical, and dielectric properties were investigated. The crystallite compounds were obtained by calcinating the mixture of PbCO3, TiO2, and La2O3 at 1000ºC for different time periods. After 4 h annealing, PLT23 sample, no secondary phases have been observed in the XRD spectrum of the PLT sample with 23% La content (PLT23). This sample appears to be notably distinguished in its structural, optical, and dielectric characteristics compared with other samples.

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Fabrication and dielectric properties of lead titanate nanocomposites

Cited by 13 publications

References 35 publications

Dielectric properties of PbTiO3/ZnO ceramic nanocomposites obtained by solid-state reaction method

Dielectric properties of PbTiO3/ZnO ceramic nanocomposites obtained by solid-state reaction method

Ferroelectric behavior and spectroscopic properties of La-Modified lead titanate nanoparticles prepared by a sol-gel method

Ferroelectric Behavior and Spectroscopic Properties of La-Modified Lead Titanate Nanoparticles Prepared by a Sol-Gel Method

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