Structural, dielectric and electrical properties of BaFe0.5Nb0.5O3 ceramic prepared by solid-state reaction technique

Ganguly, M.; Parida, S.; Sinha, E.; Rout, S. K.; Simanshu, A.K.; Hussain, Ali; Kim, I.W.

doi:10.1016/j.matchemphys.2011.10.017

Cited by 54 publications

(11 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the cubic phase, the zone center optical phonons belong to 3F 1u + F 2u irreducible representations. Each of the F 1u modes is triply degenerate and infrared active, while the F 2u modes are Raman active [46]. According to the group theory calculation no first order Raman active modes are possible in materials with cubic symmetry [47].…”

Section: Numerical Simulationmentioning

confidence: 98%

Structural, microwave dielectric properties and dielectric resonator antenna studies of Sr(ZrxTi1−x)O3 ceramics

Parida

Rout

Subramanian

et al. 2012

Journal of Alloys and Compounds

Self Cite

View full text Add to dashboard Cite

Section: Numerical Simulationmentioning

confidence: 98%

Structural, microwave dielectric properties and dielectric resonator antenna studies of Sr(ZrxTi1−x)O3 ceramics

Parida

Rout

Subramanian

et al. 2012

Journal of Alloys and Compounds

Self Cite

View full text Add to dashboard Cite

“…It is also well known that during technological processes using high sintering temperatures, oxygen vacancies and Fe 2+ are created, resulting in growth of the electrical conductivity, dielectric loss, as well space charge, an excess of which accumulates on the grain boundaries [16]. The ceramic samples obtained by a combined method (by MA and SPS techniques) show very higher values of electric permittivity at room temperature in comparison with BFN ceramics obtained by the Solid-State Reaction Method [23]. BFN ceramics is an interesting material in terms of the possibility of new applications (e.g., as a shield against electromagnetic radiation) due to its negative dielectric properties at higher temperatures (Figures 5 and 6a).…”

Section: Resultsmentioning

confidence: 99%

“…These high dielectric constants are influenced by both extrinsic as well as intrinsic factors [16]. In order to improve the dielectric properties of the BFN materials, different technologies for obtaining ceramics are used [17][18][19][20][21][22][23][24][25], or modifiers are introduced into the base compound [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Mechanochemical Activation and Spark Plasma Sintering of the Lead-Free Ba(Fe1/2Nb1/2)O3 Ceramics

et al. 2021

View full text Add to dashboard Cite

This paper investigates the impact of the technological process (Mechanochemical Activation (MA) of the powder in combination with the Spark Plasma Sintering (SPS) method) on the final properties of lead-free Ba(Fe1/2Nb1/2)O3 (BFN) ceramic materials. The BFN powders were obtained for different MA duration times (x from 10 to 100 h). The mechanically activated BFN powders were used in the technological process of the BFN ceramics by the SPS method. The measurements of the BFNxMA ceramic samples included the following analysis: Scanning Electron Microscopy (SEM), Energy Dispersive Spectrometry (EDS), DC electrical conductivity, and dielectric properties. X-ray diffractions (XRD) tests showed the appearance of the perovskite phase of BFN powders after 10 h of milling time. The longer milling time (up 20 h) causes the amount of the perovskite phase to gradually increase, and the diffraction peaks are more clearly visible. Short high energy milling times favor a large heterogeneity of the grain shape and size. Increasing the MA milling time to 40 h significantly improves the microstructure of BFN ceramics sintered in the SPS technology. The microstructure becomes fine-grained with clearly visible grain boundaries and higher grain size uniformity. Temperature measurements of the BFN ceramics show a number of interesting dielectric properties, i.e., high values of electric permittivity, relaxation properties with a diffusion phase transition, as well as negative values of dielectric properties occurring at high temperatures. The high electric permittivity values predestines the BFNxMA materials for energy storage applications e.g., high energy density batteries, while the negative values of dielectric properties can be used for shield elements against the electromagnetic radiation.

show abstract

“…Researchers constantly tried to improve the dielectric nature of material by way of controlling grain growth and designing microstructure inhomogeneity [11]. Many research findings have suggested the BaFe0.5Nb0.5O3 based systems can be used as HDC materials, However, dielectric loss(~1) of BaFe 0.5 Nb 0.5 O 3 ceramic is high at room temperature [12,13]. Electric properties of BFN system can be improved by doping or by forming solid solutions with other systems.…”

Section: Introductionmentioning

confidence: 99%

Structural and Conductivity studies of BFN-ST40 Nanoceramics Processed by Ball milling

Kumar¹

2018

IJRASET

View full text Add to dashboard Cite

0.60 Ba(Fe 0.5 Nb 0.5)O 3-0.40 SrTiO 3 nanoceramics sample was prepared by ball milling induced solid-state reaction method after annealing at high temperature 1200 o C.The phase purity and crystallinity have been studied by using the X-ray diffraction (XRD) technique. The micro structural analysis has been carried out by field emission scanning electron microscopy (FESEM). Conductivity studies have done on the basis of experimental data obtained by impedance analyzer. Variation in Activation energies with the increase in frequency exhibits that at lower frequency the long range hopping involves to overcome the high barrier width while the lower activation energy at high frequency involves the short range or localized hopping. Jump relaxation model (JRM) and Universal dielectric response (UDR) law have been used to explain conductivity behavior of present sample.

show abstract

Structural, dielectric and electrical properties of BaFe0.5Nb0.5O3 ceramic prepared by solid-state reaction technique

Cited by 54 publications

References 19 publications

Structural, microwave dielectric properties and dielectric resonator antenna studies of Sr(ZrxTi1−x)O3 ceramics

Structural, microwave dielectric properties and dielectric resonator antenna studies of Sr(ZrxTi1−x)O3 ceramics

Mechanochemical Activation and Spark Plasma Sintering of the Lead-Free Ba(Fe1/2Nb1/2)O3 Ceramics

Structural and Conductivity studies of BFN-ST40 Nanoceramics Processed by Ball milling

Contact Info

Product

Resources

About