BaTi1–xZrxO3 nanopowders prepared by the modified Pechini method

Bernardi, M. I. B.; Antonelli, Eduardo; Lourenço, Ariane Baffa; Feitosa, Carlos Alberto Carneiro; Maia, Lauro J. Q.; Hernandes, Antônio Carlos

doi:10.1007/s10973-006-7767-z

Cited by 21 publications

(9 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…BaTiO3 and BaTi0.8Zr0.2O3 powders were synthesized by the polymeric precursor route, as described elsewhere [18]. A Barium acetate (99%, Alpha hours, measured at 1 kHz.…”

Section: Methodsmentioning

confidence: 99%

Microstructure effects on BaTiO3/BaTi0.8Zr0.2O3 composites properties

Amaral

Antonelli

Ochoa

et al. 2016

Ceramics International

View full text Add to dashboard Cite

The dielectric, pyroelectric and ferroelectric properties of bilayered BaTiO3/BaTi0.8Zr0.2O3 ceramics are described and correlated with their microstructure. Different sintering times are employed to change the microstructure and promote interdiffusion between the layers. The effects of constrained sintering on both compositions are analyzed and their properties are compared to that of single phase BaTiO3 and BaTi0.8Zr0.2O3 ceramics. The results show that, at sintering times until 2 hours, the bilayer properties are predominantly affected by the presence of residual stresses. Only after 4 hours sintering, the properties are predominantly affected by interdiffusion between the layers.

show abstract

“…BaTiO3 and BaTi0.8Zr0.2O3 powders were synthesized by the polymeric precursor route, as described elsewhere [18]. A Barium acetate (99%, Alpha hours, measured at 1 kHz.…”

Section: Methodsmentioning

confidence: 99%

Microstructure effects on BaTiO3/BaTi0.8Zr0.2O3 composites properties

Amaral

Antonelli

Ochoa

et al. 2016

Ceramics International

View full text Add to dashboard Cite

show abstract

“…Em geral o objetivo do método Pechini consiste na obtenção de materiais dielétricos altamente puros, de composição controlada e na forma de pós e de filmes finos [11][12][13]. Esse método é uma rota simples de preparação de pós, fundamentada na capacidade que certos ácidos -hidroxicarboxílicos possuem para formar quelatos.…”

Section: Método Pechiniunclassified

Preparação e caracterização de pós e filmes finos de BaTiO3 sintetizados via método Pechini

Cerconi

González‐Borrero

2013

Matéria (Rio J.)

View full text Add to dashboard Cite

RESUMONos últimos anos o emprego do titanato de bário (BaTiO 3 ) na indústria de cerâmicas tecnológicas e em dispositivos optoeletrônicos tem se incrementado em decorrência de suas propriedades ferroelétricas, termoelétricas, piezoelétricas e ópticas. O objetivo deste trabalho foi sintetizar e caracterizar pós e filmes finos amorfos de titanato de bário (BaTiO 3 ), por meio do método Pechini. Esses pós foram caracterizados via Análise Térmica (TG/DSC) e Difração de Raios X (DRX). A temperatura utilizada no tratamento térmico dos pós foi de 400°C a 800°C dependendo da amostra, durante 10 horas. A análise estrutural de DRX revelou um aumento da linha espectral, que pode ser observada em alguns difratogramas, próxima do ângulo de 30° em 2, sugerindo uma maior cristalinidade e um aumento do tamanho do cristalito provocado pelo aumento da temperatura de calcinação. Essas análises indicaram também a presença de BaCO 3 , além disso, observou-se a formação de apenas um pico próximo a 45° em 2, sugerindo a formação de titanato com fase cúbica. A partir dos difratogramas foi calculado o tamanho de grão, o resultado obtido foi da ordem de 20 nm. Os filmes finos de BaTiO 3 foram depositados via Dip Coating. Esses filmes foram analisados por meio da Microscopia de Força Atômica (AFM). Esta técnica permitiu observar aglomerações de partículas em todos os filmes. A superfície desses filmes apresentou alterações significativas em sua rugosidade com aumento da temperatura de tratamento térmico dos filmes. Palavras-chave:Titanato de Bário; Método Pechini; Filmes Finos. ABSTRACTIn recent years the use of barium titanate (BaTiO 3 ) in ceramics industry technology and optoelectronic devices has increased due to their ferroelectric, thermoelectric, piezoelectric and optical properties. The objective of this study was to synthesize and characterize amorphous powders and thin films of barium titanate (BaTiO 3 ), through the Pechini method. These powders were characterized via thermal analysis (TG / DSC) and X-Ray Diffraction (XRD). The temperature employed in the heat treatment of the powders was 400° C to 800° C depending on the sample, for 10 hours. Structural analysis of the XRD revealed an increase in the spectral line which can be observed in some diffractograms patterns near to the angle of 30º 2, suggesting a higher crystallinity and an increase in crystallite size caused by the increase of the calcination temperature. These tests also indicate the presence of BaCO 3 and was also observed the formation of only one peak at 45° 2, suggesting the formation of cubic phase with titanate. Through the results obtained from the XRD the grain size was calculated, whose dimensions gotten were approximately 50 nm. BaTiO 3 thin films were deposited by dip coating. These films were studied by atomic force microscopy (AFM). This technique allowed us to observe clusters of particles in every film. The surface of these films presented significant changes in roughness with increasing temperature heat treatment of films.

show abstract

“…Details about the powder synthesis and structural characterization can be found in Bernardi et al 5 . To electrophoretic deposition, two different suspensions were studied: (1) BTZ+ethanol (EtOH) and (2) BTZ in a mixture of acetylacetone (Acac) and ethanol (EtOH) (1:1 volumetric ratio) (Acac+EtOH).…”

Section: Methodsmentioning

confidence: 99%

“…As the Zr content increases, the phase transition temperaturesapproach each other, until, at a Zr content ofy∼0.15, only one phase transition exists [2][3][4] . The achievement of BTZ nanometric particles has been studied using polymeric precursor methods 5 . Compared to the traditional solid state reaction method,the main advantage of this method is the better control of the stoichiometry, high purity, easy dopant incorporation, and formation of nanometric particles with controlled particle size 6,7 .…”

Section: Introductionmentioning

confidence: 99%

Electrophoretic deposition of BaTi0.85Zr0.15O3 nanopowders

et al. 2013

View full text Add to dashboard Cite

The present study reports the results of thick films (20-130 µm) produced through electrophoretic deposition of BaTi 0.85 Zr 0.15 O 3 (BTZ) nanometric powders synthesized by the Pechini's method. The BTZ powderscalcined at 600°C/2h presented a single crystalline phase with an average particle size of ~20nm. To thick films deposition, a stable suspension of acetylacetone (Acac) and ethanol (EtOH)was prepared and the powder was deposited on platinum substrates. The viscosity of BTZ powders suspensions as a function of operational pH (OpH)was measured and the reactions between nanoparticles and the media were discussed. A milling process was used to deagglomerate the powders and it had a great influence in the suspension stability and deposition of thick films. Dense and crack-free thick films were obtained after sintering at 1220 °C/1h. The dielectric properties results, comparable with those of bulk BTZ ceramics, suggested potential applications of the EPD process for the deposition of ferroelectric/piezoelectric thick films.

show abstract

BaTi1–xZrxO3 nanopowders prepared by the modified Pechini method

Cited by 21 publications

References 21 publications

Microstructure effects on BaTiO3/BaTi0.8Zr0.2O3 composites properties

Microstructure effects on BaTiO3/BaTi0.8Zr0.2O3 composites properties

Preparação e caracterização de pós e filmes finos de BaTiO3 sintetizados via método Pechini

Electrophoretic deposition of BaTi0.85Zr0.15O3 nanopowders

Contact Info

Product

Resources

About