Dielectric, ac-impedance and modulus spectroscopic studies of nano-crystalline Bi0.5Na0.5TiO3 synthesized by using one pot glycine assisted solution combustion from inexpensive TiO2

Singh, Laxman; Kim, Ill Won; Singh, Shalendra; Sin, Byung Cheol; Woo, Sang Kook; Lee, Youngil

doi:10.1007/s10854-014-2477-y

Cited by 11 publications

(5 citation statements)

References 38 publications

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“…For example, bismuth-based titanates, such as Na 0.5 Bi 0.5 TiO 3 , is an electroceramic material with Curie temperature ∼320 °C, cohesive field of 73 Kv/cm, and remnant polarization ∼40 μC/cm 2 . Ma et al and Singh et al reported on the solution combustion synthesis of this compound. Ma and co-workers employed urea as fuel and Ti(C 4 H 9 O 4 ) 4 as the titanium source, in addition to a solution of sodium and bismuth nitrate .…”

Section: Solution Combustion-derived Materialsmentioning

confidence: 99%

Section: Solution Combustion-derived Materialsmentioning

confidence: 99%

“…Singh et al 711 utilized solid TiO 2 as titanium source and solutions of bismuth and sodium nitrates as well as glycine to prepare Na 0.5 Bi 0.5 TiO 3 ceramic nanopowders. The combustion reaction in a slurry of TiO 2 and the reactive solution was ignited on a hot plate, and then the resulting material was calcined at 800 °C.…”

Section: Nanoceramicsmentioning

confidence: 99%

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Solution Combustion Synthesis of Nanoscale Materials

Mukasyan²,

et al. 2016

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Solution combustion is an exciting phenomenon, which involves propagation of self-sustained exothermic reactions along an aqueous or sol-gel media. This process allows for the synthesis of a variety of nanoscale materials, including oxides, metals, alloys, and sulfides. This Review focuses on the analysis of new approaches and results in the field of solution combustion synthesis (SCS) obtained during recent years. Thermodynamics and kinetics of reactive solutions used in different chemical routes are considered, and the role of process parameters is discussed, emphasizing the chemical mechanisms that are responsible for rapid self-sustained combustion reactions. The basic principles for controlling the composition, structure, and nanostructure of SCS products, and routes to regulate the size and morphology of the nanoscale materials are also reviewed. Recently developed systems that lead to the formation of novel materials and unique structures (e.g., thin films and two-dimensional crystals) with unusual properties are outlined. To demonstrate the versatility of the approach, several application categories of SCS produced materials, such as for energy conversion and storage, optical devices, catalysts, and various important nanoceramics (e.g., bio-, electro-, magnetic), are discussed.

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Section: Solution Combustion-derived Materialsmentioning

confidence: 99%

Section: Solution Combustion-derived Materialsmentioning

confidence: 99%

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Solution Combustion Synthesis of Nanoscale Materials

Mukasyan²,

et al. 2016

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“…The transition from long-range to short-range mobility indicates the existence of a hopping-type mechanism for charge transport within the material. In a hopping mechanism, charge carriers hop between localized states or sites, and the transition in mobility reflects changes in the dynamics of this hopping process [ 82 ].…”

Section: Resultsmentioning

confidence: 99%

Enhanced Spectroscopic Insight into Acceptor-Modified Barium Strontium Titanate Thin Films Deposited via the Sol–Gel Method

Czekaj,

Lisińska-Czekaj

2024

Materials

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In the present paper, composite thin films of barium strontium titanate (BaxSr1−xTiO3) with an acceptor modifier (magnesium oxide—MgO) were deposited on metal substrates (stainless steel type) using the sol–gel method. The composite thin films feature BaxSr1−xTiO3 ferroelectric solid solution as the matrix and MgO linear dielectric as the reinforcement, with MgO concentrations ranging from 1 to 5 mol%. Following thermal treatment at 650 °C, the films were analyzed for their impedance response. Experimental impedance spectra were modeled using the Kohlrausch–Williams–Watts function, revealing stretching parameters (β) in the range of approximately 0.78 to 0.89 and 0.56 to 0.90 for impedance and electric modulus formalisms, respectively. Notably, films modified with 3 mol% MgO exhibited the least stretched relaxation function. Employing the electric equivalent circuit method for data analysis, the “circle fit” analysis demonstrated an increase in capacitance from 2.97 × 10−12 F to 5.78 × 10−10 F with the incorporation of 3 mol% MgO into BST-based thin films. Further analysis based on Voigt, Maxwell, and ladder circuits revealed trends in resistance and capacitance components with varying MgO contents, suggesting non-Debye-type relaxation phenomena across all tested samples.

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“…However, the use of the leadbased ceramics has caused great damage to the environment and human health because of the strong toxicity and high volatility of lead oxide. Therefore, there is an increasing demand to develop environment-friendly leadfree piezoelectric ceramics with excellent piezoelectricity for replacing lead-based ceramics [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Improved piezoelectric and bright up-conversion photoluminescent properties in Ho-doped Bi0.5Na0.5TiO3–BaTiO3 lead-free ceramics

Zhou

Zou

Tian

et al. 2015

J Mater Sci: Mater Electron

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Lead-free ceramics of 0.94(Bi 1-x Ho x Na) 0.5 TiO 3 -0.06BaTiO 3 have been prepared by a conventional solid reaction method and their piezoelectric, ferroelectric and photoluminescent properties have been studied. After the partial substitution of Ho 3? for Bi 3? , a new Bi 0.5 Na 0.5 TiO 3 -based solid solution with a pure perovskite structure is formed. The doping of Ho 3? has no obvious influence on the crystal structure of the ceramics. After the addition of a small amount of Ho 3? (x = 0.015), the piezoelectricity (d 33 = 187 pC/N, k p = 41.1 %, respectively) and ferroelectricity (P r = 25.2 lC/cm 2 ) of ceramics are enhanced. The down-conversion and up-conversion photoluminescence of the ceramics are observed. A green down-conversion emission band at 548 nm is observed which is from the 5 S 2 ? 5 I 8 transition of Ho 3? ; the main down-conversion excitation bands located at 410-500 nm is due to the 5 I 8 ? 5 G 5, 6 transitions, and the maximum brightness of down-conversion photoluminescence are obtained at x = 0.015. The ceramic with x = 0.01 exhibits the maximum value of the up-conversion emission at 475 nm, which is attributed to the 5 F 3 ? 5 I 8 transition. Our study shows that the ceramics with x = 0.01-0.02 exhibit simultaneously good piezoelectricity, strong ferroelectricity and excellent photoluminescence, suggesting a potential application in the electro-optic devices.

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Dielectric, ac-impedance and modulus spectroscopic studies of nano-crystalline Bi0.5Na0.5TiO3 synthesized by using one pot glycine assisted solution combustion from inexpensive TiO2

Cited by 11 publications

References 38 publications

Solution Combustion Synthesis of Nanoscale Materials

Solution Combustion Synthesis of Nanoscale Materials

Enhanced Spectroscopic Insight into Acceptor-Modified Barium Strontium Titanate Thin Films Deposited via the Sol–Gel Method

Improved piezoelectric and bright up-conversion photoluminescent properties in Ho-doped Bi0.5Na0.5TiO3–BaTiO3 lead-free ceramics

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