Direct large-scale synthesis of perovskite barium strontium titanate nano-particles from solutions

Qi, J.; Wang, Yu; Chen, Wan Ping; Li, Long Tu; Chan, Helen Lai Wah

doi:10.1016/j.jssc.2004.12.003

Cited by 44 publications

(25 citation statements)

References 26 publications

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“…Advantages and disadvantages of traditional processes vs. the centrifuge-and microwave-assisted processes in terms of nature of precursors, calcination temperature, production of by-products, and control over molar stoichiometric ratio. Inferior stoichiometric control Wet chemical synthesis technique (4) .…”

Section: Resultsmentioning

confidence: 99%

“…Yet another hydrothermal route required no calcination, which saved an enormous amount of energy, especially during mass production. However, a precursor gel was produced using TiCl 4 , a toxic and corrosive chemical for the environment (7). One study attempted a one-step synthesis, or a simple direct precipitation method involving temperatures lower than 1008C.…”

Section: Introductionmentioning

confidence: 99%

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Toward a more environmentally benign synthesis of doped barium titanate

Marteel‐Parrish

DeCarlo

Harlan

et al. 2008

Green Chemistry Letters and Reviews

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Barium titanate is one of the most thoroughly studied members of the perovskite family due to its prominent place in the electroceramic industry. To be used as a capacitor at room temperature, a high-dielectric constant is needed which is achieved through doping. The focus of this research was to develop a more environmentally benign alternative to the doping of barium titanate. The barium source was barium titanyl catecholate, Ba[Ti(cat) 3 ] (aq) and the doping sources were strontium oxalate (SrC 2 O 4 ) and strontium carbonate (SrCO 3 ). The doping strategies included a solid-state synthetic pathway as well as microwave-and centrifuge-assisted methods which both employed water as the only solvent. The last two benign by design methods were tested with respect to their thermodynamic control over barium-to-strontium stoichiometric ratios. These methods of doping proved to be more environmentally friendly and economical while combining green chemistry and materials science.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Toward a more environmentally benign synthesis of doped barium titanate

Marteel‐Parrish

DeCarlo

Harlan

et al. 2008

Green Chemistry Letters and Reviews

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“…All of the 75 developments in the synthesis of nanoscale ferroelectrics will not be complete without a proper choice of characterisation tools to study the ferroelectric features at the nanoscale, and these techniques will be also discussed; focusing on scanning probe based techniques, especially piezoresponse microscopy (PFM), as 80 these are the vital characterisation tools to investigate the ferroelectric and piezoelectric functionality at the nanoscale.…”

Section: Nanoscale Ferroelectrics and Piezoelectricsmentioning

confidence: 99%

“…29,31,141,142,164,[225][226][227][228][229] For example, in 1988 Ishikawa and co-workers experimentally demonstrated that sol-gel-prepared PbTiO3 nanoparticles displayed a critical 75 size limit of approximately 10 nm at 300 K. 141,142 Later on, Fong et al 31 demonstrated that the ferroelectric phase in PbTiO3 thin films was stable for thicknesses down to 3 unit cells (~ 1.2 nm) at room temperature. Roelofs et al 98 suggested that the reduced critical size-limit of thin films could be due to the fact that they 80 shrink the ferroelectric polarisation component in one dimension only, but not in all three directions as with nanoparticles. The critical film thickness of other pervoskite-based ferroelectrics such as BaTiO3 (2.4 nm) 229 and PZT (4 nm) 226 have also been demonstrated experimentally.…”

Section: Scaling Effects Of Nanoscale Ferroelectric Materialsmentioning

confidence: 99%

“…10,252 In addition, pyroelectric materials can act as energy scavengers, 253 whereby electrical energy can be created from wasted heat in an electronic circuit. 254 Owing to their high dielectric permittivity, ferroelectrics also find extensive use as 80 capacitors in electronic industry. 11,243,249 Apart from the niche applications mentioned above, the latest developments in the use of nanoferroelectrics are summarised in the following section.…”

Section: Applications Of Nanoscale Ferroelectric Materialsmentioning

confidence: 99%

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Ferroelectric nanoparticles, wires and tubes: synthesis, characterisation and applications

2013

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Nanostructured materials are central to the evolution of future electronics and information technologies. Ferroelectrics have already been established as a dominant branch in the electronics sector because of their diverse application range such as ferroelectric memories, ferroelectric tunnel junctions, etc. The on-going dimensional downscaling of materials to allow packing of increased numbers of components onto integrated circuits provides the momentum for the evolution of nanostructured ferroelectric materials and devices. Nanoscaling of ferroelectric materials can result in a modification of their functionality, such as phase transition temperature or Curie temperature (TC), domain dynamics, dielectric constant, coercive field, spontaneous polarisation and piezoelectric response. Furthermore, nanoscaling can be used to form high density arrays of monodomain ferroelectric nanostructures, which is desirable for the miniaturisation of memory devices. This review article highlights some research breakthroughs in the fabrication, characterisation and applications of nanoscale ferroelectric materials over the last decade, with priority given to novel synthetic strategies

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Synthesis of silver nanocrystals by a modified polyol method

Bregado-Gutiérrez¹,

Saldívar-García²,

López³

2007

J of Applied Polymer Sci

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A modification of the polyol method has been shown to result in improved efficiency and enhanced kinetics for the synthesis of silver nanocrystals when compared with the traditional polyol method. The Ag nanocrystals produced were characterized using Xray diffraction and transmission electron microscopy. Accordingly, the exhibited Ag crystal structure, corresponding lattice constants, and resultant particle sizes were determined by these means. In addition, using Fourier transform infrared spectroscopy, it was found that a solid-state reaction between the AgNO 3 and the Poly (vinylpyrrolidone) (PVP) takes place prior to their dissolution in ethylene glycol. Moreover, when crystals grow under total rest conditions, they do not develop a spherical morphology as in the traditional polyol method, but a well-defined geometric shape showing preferential crystallographic growth directions. Under the experimental conditions of this work, the exhibited nanocrystal shapes were quasi-planar hexagonal. Apparently, PVP interacts with the FCC crystal structure promoting growth on the {100} preferential direction by playing the role of an atomic arranger.

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Direct large-scale synthesis of perovskite barium strontium titanate nano-particles from solutions

Cited by 44 publications

References 26 publications

Toward a more environmentally benign synthesis of doped barium titanate

Toward a more environmentally benign synthesis of doped barium titanate

Ferroelectric nanoparticles, wires and tubes: synthesis, characterisation and applications

Synthesis of silver nanocrystals by a modified polyol method

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