Sol–gel combustion synthesis of Zr-doped BaTiO 3 nanopowders and ceramics: Dielectric and ferroelectric studies

Aghayan, Mahdi; Zak, A. Khorsand; Behdani, Mohammad; Hashim, Ahmad Hariza

doi:10.1016/j.ceramint.2014.07.045

Cited by 62 publications

(17 citation statements)

References 13 publications

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“…This fact accordingly controls the size of the particles within the sol. Our results showed that this step is essential and crucial for the preparation of the optical solutions because direct contact of the water with titanium alkoxide results in precipitation of Ti(OH) 4 and therefore must be avoided. 2-propanol/Ti ratios of 1, 3, 4, 6 and 9 were tested.…”

Section: Evolution Of the Preparation Methods And The Applied Optimizamentioning

confidence: 95%

“…Barium titanate with high transmittance in the visible region is a suitable candidate for various electro-optic applications such as solar power systems [1][2][3], dielectric mirrors and antireflective coatings. The use of alkoxides and sol-gel process for preparation of metal oxides powders and thin films has been explored with a view to nanostructuring [2][3][4][5]. Solar energy conversion is receiving increasing interest as a serious solution to energy production.…”

Section: Introductionmentioning

confidence: 99%

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A new sol–gel processing routine without chelating agents for preparing highly transparent solutions and nanothin films: engineering the role of chemistry to design the process

Ashiri

2014

Philosophical Magazine

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The great sensitivity of titanium alkoxides to hydrolysis makes their sol-gel transformation very fast and thus difficult to control. A method was proposed to alleviate this drawback. Preparation of highly transparent solutions and nanothin films is another objective of the present research. Employing nanoemulsion method and optimizing the processing conditions, a clear solution of well-dispersed nanosized particles was obtained. With the proposed process BaTiO 3 precursor sols and nanothin films with enhanced optical transparency towards the visible were prepared. The optimal formulation of the sol consists of acetic acid, barium acetate, 2-propanol, TTIP and deionized water with 6:1:1:1:150 M ratios, respectively. It was found that the reduction of the temperature in the initial stage of mixing of precursors controls the size of the forming species and accordingly improves the stability and transparency of the sol. The results also showed that the applied modifications and optimizations significantly downsize the particles within the sol to the nanometric scale and accordingly result in a significant improvement in the optical response of the products.

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Section: Evolution Of the Preparation Methods And The Applied Optimizamentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

A new sol–gel processing routine without chelating agents for preparing highly transparent solutions and nanothin films: engineering the role of chemistry to design the process

Ashiri

2014

Philosophical Magazine

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“…Co-precipitation via oxalate [16] and citrates [17] can produce BaTiO 3 at a lower temperature easier than other methods. Alternative and modified techniques also were proposed such as sonochemical [18], supercritical fluid [19], sol-gel hydrothermal [20], Sol-gel combustion [21], microwave solvothermal [22], microwave-hydrothermal [23], etc. Much excellent work has been carried out by soft chemistry, but it usually requires the complicated step of experimental procedures, which need a highly purified, expensive precursor and specific equipment.…”

Section: Introductionmentioning

confidence: 99%

A facile one step conversion of the sub-micrometer to uniform nanopowder in tetragonal BaTiO3 via a surface active etching salt

Charoonsuk

Vittayakorn

2016

Materials & Design

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“…Moreover, Sun et al (2014) observed that the dielectric constant as a function of temperature showed a decrease in Curie temperature (T C ) with increasing Zr concentration. Similarly, Aghayan et al (2014) reported that a significant increase in the permittivity of Zr doped BaTiO 3 material was revealed as well as the best dielectric properties and a ferroelectric behavior were found for Zr content equal to x=0.05. Furthermore, zirconium doping in ZnO matrice has been used extensively.…”

Section: Introductionmentioning

confidence: 71%

Electric Conduction Mechanisms Study within Zr Doped Mn₃O₄ Hausmannite Thin Films through an Oxidation Process in Air

Saïd

Boughalmi

Inoubli

et al. 2017

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In this work further optical and electrical investigations of pure and Zr doped Mn 3 O 4 (from 0 up to 20 at.%) thin films as a function of frequency. First, the refractive index, the extinction coefficient and the dielectric constants in terms of Zr content are reached from transmittance and reflectance data. The dispersion of the refractive index is discussed by means of Cauchy model and Wemple and DiDomenico single oscillator models. By exploiting these results, it was possible to estimate the plasma pulse ω p , the relaxation time τ and the dielectric constant ε ∞ . Second, we have performed original ac and dc conductivity studies inspired from Jonscher model and Arrhenius law. These studies helped establishing significant correlation between temperature, activation energy and Zr content. From the spectroscopy impedance analysis, we investigated the frequency relaxation phenomenon and hopping mechanisms of such thin films. Moreover, a special emphasis has been putted on the effect of the oxidation in air of hausmannite thin films to form Mn 2 O 3 ones at 350°C. This intrigue phenomenon which occurred at such temperature is discussed along with this electrical study. Finally, all results have been discussed in terms of the thermal activation energies which were determined with two methods for both undoped and Zr doped Mn 3 O 4 thin films in two temperature ranges.

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Sol–gel combustion synthesis of Zr-doped BaTiO 3 nanopowders and ceramics: Dielectric and ferroelectric studies

Cited by 62 publications

References 13 publications

A new sol–gel processing routine without chelating agents for preparing highly transparent solutions and nanothin films: engineering the role of chemistry to design the process

A new sol–gel processing routine without chelating agents for preparing highly transparent solutions and nanothin films: engineering the role of chemistry to design the process

A facile one step conversion of the sub-micrometer to uniform nanopowder in tetragonal BaTiO3 via a surface active etching salt

Electric Conduction Mechanisms Study within Zr Doped Mn₃O₄ Hausmannite Thin Films through an Oxidation Process in Air

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Sol–gel combustion synthesis of Zr-doped BaTiO 3 nanopowders and ceramics: Dielectric and ferroelectric studies

Cited by 62 publications

References 13 publications

A new sol–gel processing routine without chelating agents for preparing highly transparent solutions and nanothin films: engineering the role of chemistry to design the process

A new sol–gel processing routine without chelating agents for preparing highly transparent solutions and nanothin films: engineering the role of chemistry to design the process

A facile one step conversion of the sub-micrometer to uniform nanopowder in tetragonal BaTiO3 via a surface active etching salt

Electric Conduction Mechanisms Study within Zr Doped Mn3O4 Hausmannite Thin Films through an Oxidation Process in Air

Contact Info

Product

Resources

About

Electric Conduction Mechanisms Study within Zr Doped Mn₃O₄ Hausmannite Thin Films through an Oxidation Process in Air