Structural and dielectric properties of La-doped lead titanate ceramics

Kellati, M.; Sayouri, S.; Moudden, N. El; Elaatmani, M.; Kaal, A.; Taïbi, M.

doi:10.1016/j.materresbull.2004.01.003

Cited by 20 publications

(9 citation statements)

References 16 publications

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“…Synthesis of PT powder Crystalline nanopowders PT:Mgx, were synthesized by the sol-gel process [12,13] . Then, the pellets were sintered according to the following sintering cycle: a first temperature level at 600 °C during 1 h was created for removing the PVA followed by a second level at 1000 °C for 6 h reached with a heating rate 5 K/min.…”

Section: Methodsmentioning

confidence: 99%

Synthesis and characterization of magnesium doped lead titanate

Fadil

Lamcharfi

Abdi

et al. 2011

Cryst. Res. Technol.

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Magnesium (Mg) doped lead titanate powders (PT: Mg) ceramics, with various Mg contents (0, 2.5, 5, 7.5, 10, 12.5, 15, 17.5, 20, and 30 mol%), are prepared by the sol-gel method and characterized by X-Ray diffraction (XRD), scanning electron microscopy (SEM) and Raman spectroscopy. XRD results show that the magnesium diminishes the lattice tetragonality of PT:Mg. The average particle size and morphology were studied by SEM. The investigations done by Raman spectroscopy allow the analyzis of the substitution mechanism behavior related to the Mg incorporation into PT structure. A concentration threshold appears around 10% of Mg corresponding in a change of the compensation process with Mg 2+ ions replacing Pb 2+ions below and both Pb 2+ and Ti 4+ above.

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Section: Methodsmentioning

confidence: 99%

Synthesis and characterization of magnesium doped lead titanate

Fadil

Lamcharfi

Abdi

et al. 2011

Cryst. Res. Technol.

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“…Com o meio reacional ainda sob agitação, adicionou-se etilenoglicol. O controle de pH foi feito adicionando-se NH 4 OH antes da adição do etilenoglicol. A solução precursora obtida foi submetida a uma pré-calcinação (250 ºC por 2 h) seguido de desaglomeração e tratamento térmico de 300 a 700 ºC, por duas horas em fluxo de oxigênio a uma taxa de aquecimento de 10 ºC.min -1 .…”

Section: Methodsunclassified

“…Titanato de chumbo (PT) é um dos materiais ferroelétricos mais investigados devido às suas propriedades dielétricas, piroelétricas e piezoelétricas [1][2][3][4], que são de grande interesse científico e tecnológico. Devido a isto, o PT apresenta grande tendência para ser aplicado como piroelétrico estável e material piezelétrico para aplicações em altas temperaturas ou altas freqüências [5], sendo muito utilizado como transdutor ultra-sônico em aplicações médicas e sonares [6].…”

Section: Introductionunclassified

Comportamento térmico do PbTiO3 modificado por terras raras

et al. 2005

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Titanatos de chumbo dopados com itérbio e ítrio, PYbT e PYT foram preparados pelo método Pechini. Os materiais obtidos foram calcinados sobre fluxo de oxigênio em diferentes temperaturas e investigados utilizando-se as técnicas de difração de raios X (DRX), microscopia eletrônica de varredura (MEV) e espectroscopia na região do infravermelho (IV). O comportamento térmico de PbTiO3 dopados com itérbio e ítrio é descrito através de curvas termogravimétricas (TG) e análise térmica diferencial (ATD). Os resultados revelaram que a fase perovskita foi obtida em uma baixa temperatura e que o aumento da dopagem favorece a estabilidade térmica dos materiais obtidos.

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“…A number of techniques have been developed to prepare ferroelectric ceramics such as conventional solid-state reaction [3,4] glycothermal process [5], sol-gel [6,7] as well as hydrothermal [8,9] etc. This work presents an alternative process to prepare the ferroelectric material powder lead lanthanum titanate Pb 1−x La x TiO 3 (x = 0.20): the combustion synthesis process [10,11].…”

Section: Surface and Microstructural Characterization Of Lanthanum Momentioning

confidence: 99%

Surface and Microstructural Characterization of Lanthanum Modified Lead Titanate Obtained by Combustion Synthesis

et al. 2006

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Luiz, km 235, 13565-905, São Carlos, SP, Brasil Perovskite-type lead lanthanum titanate powders, (Pb,La)TiO 3 (PLT) were successfully prepared by the combustion synthesis method. The ceramic powders were analyzed by X-ray diffraction (XRD), surface area measurement, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Surface chemical composition was investigated by X-ray photoelectron spectroscopy (XPS), which revealed the presence of La 3+ , Ti 4+ , and two Pb species, related to the perovskite and lead oxide phases. The assynthesized product characterization indicated that the type of combustible used, urea and glycine, plays an important role in the kinetic and thermochemical parameters of the reaction, and on the obtained material microstructure.

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Structural and dielectric properties of La-doped lead titanate ceramics

Cited by 20 publications

References 16 publications

Synthesis and characterization of magnesium doped lead titanate

Synthesis and characterization of magnesium doped lead titanate

Comportamento térmico do PbTiO3 modificado por terras raras

Surface and Microstructural Characterization of Lanthanum Modified Lead Titanate Obtained by Combustion Synthesis

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