Nanofibrous carbon-based electrodes constitute key components in light-weight and environmentally-friendly supercapacitors. However, there is still need to reach higher specific capacitance, better stability of the electrode materials more efficient energy density. In particular, carbon electrodes' applications are limited by their low Electric Double-Layer Capacitance (EDLC) high cost. Our goal achieve a supercapacitor with combining fast charging EDLC density pseudocapacitor feature. Here,...

1-x(Li2O–2P2O5)-xMnO2 glasses where x ​= ​0.2, 0.3 and 0.4 ​mol%, respectively, were synthesized by melted-quenching method. The Mn P oxidation states local structures around P-ions including Mn–O P–O bonding distances coordination numbers have been studied via X-ray absorption near edge structure (XANES) extended fine (EXAFS), respectively. XANES results exhibit a coexistence of state Mn2+ Mn3+ with mean value 2.82. Moreover, K-edge EXAFS show the approximately 2.083–2.094 ​Å 1.766–1.774...

Lead-free piezoelectric ceramics of Bi0.5(Na0.80K0.20)0.5TiO3 powders were prepared via a conventional solid-state reaction method, and effects calcination temperature on many properties the investigated. XRD patterns for all ceramic samples showed coexistence between rhombohedral tetragonal phases without any impurity. Calcination temperatures from 700 to 1000°C shifted depolarization 92 100°C. Dielectric improved optimum values which calcined at 800°C. The improvements related with...

This research was conducted to study influence of ferric oxide nanoparticles on the properties modified BNKT ceramics. The optimum sintering temperature 1125°C at which all compositions had low porosity (0.12–0.19%). Raman and XRD showed coexisting rhombohedral tetragonal phases throughout entire compositional range. Pr, d33 g33 were slightly degraded when additive added. maximum room dielectric (ϵ′ = 1689, tan δ 0.0606) mechanical (HV 5.6 GPa, HK 4.9 E 93 GPa KIC 1.58 MPa.m1/2) obtained for...

Effect of sintering temperatures on phase formation, mechanical and electrical properties lead-free Bi 0.5 (Na 0.8 K 0.2 ) Ti 0.98 Zr 0.02 O 3 or BNKTZ piezoelectric ceramics were investigated. The prepared via a conventional solid-state technique under various temperature range 1100-1150°C for 2 h. formation microstructure the examined using X-ray diffraction (XRD) scanning electron microscopy (SEM) method, respectively. XRD analysis indicated that all samples exhibited single perovskite...

The ferroelectric ceramics with composition of (1-x)Pb(Zr 0.52 Ti 0.48 O 3 [PZT] – x(Ba 0.9 Ca 0.1 )(Ti 0.85 Zr 0.15 )O [BCZT] (x = 0, 0.04, 0.08 and 0.10 ) have been successfully prepared via two-step mixed oxide method. material systems lead zirconate titanate (PZT) barium calcium (BCZT) intensive studied due to their remarkable properties high piezoelectric values. In this work, we are interesting combine PZT BCZT system in order improve the electrical property ceramic samples. From...

The (1−x)Pb(Ni0.33Nb0.67)0.5Ti0.35Zr0.15O3[PNNZT] – xBi0.4871Na0.4871La0.0172TiO3[BNLT] ceramics (x = 0, 0.03, 0.06, 0.09, 0.12 and 0.15) were prepared by a two steps mixed-oxide method. XRD patterns of all ceramic samples exhibited complete perovskite phase without pyroclore no second phase. BNLT addition has significant effect on the grain growth inhibition PNNZT-BNLT ceramics. dielectric studies indicated that transition behavior compositions becomes more diffuse with increasing content....

In this work, electric field-induced strain behavior and ferroelectric properties of xBCZT/PZT (with x = 0, 4 8 mol%) ceramics have been investigated. The Ec Pr increased with increasing field exhibited pinched-shape hysteresis loop at 60 kV/cm. abnormal domain walls switching the domains were used to discuss above results. value BCZT content reached maximum 0.27% (d*33 450 pm/V) for mol% sample. This offered an opportunity obtain a good candidate using in piezoelectric applications.

This research investigated the effects of sintering temperatures on structural, dielectric, ferroelectric, piezoelectric and mechanical properties lead-free Bismuth Sodium Potassium Titanate (BNKT) ceramics. The BNKT ceramics were prepared by solid-state mixed oxide method at temperature ranging from 1100 to 1150°C for 2 h. All sample showed highly density reach a maximum 1125°C 5.81 g/cm 3 . X-ray diffraction patterns exhibited pure perovskite structure with coexisting...

In this work, the properties of lead-free 0.92(Bi 0.5 Na 0.42 K 0.08 )TiO 3 -0.08(BaNb 0.01 Ti 0.99 )O or 92BNKT-8BNbT ceramic has been investigated. The sample was fabricated by a solid-state reaction technique. well sintered and dense with high density value 5.86 g/cm . X-Ray diffraction (XRD) patterns showed single perovskite phase tetragonal symmetry no impurity secondary phases. microstructure analysed using scanning electron microscopy (SEM). Average grain size measured calculated...

This research aimed to reduce electricity costs in the production process. A case study of a pipe fittings company based on actual issues, which were prioritized afterwards by Pareto diagram that shown excessive energy EM-12 and LC-44 set up It was found there problems wastes from motion Therefore, this suggests guidelines cost finding open area, arranging fixture shelves close machines distance, designing appropriate for ECRS Technical applied operating The results indicate reduction...

The work focuses on preparing and characterising BNT-based ceramics via a solidstate method. To investigate the phase, microstructure, physical electrical properties of ceramics.Lead-free piezoelectric bismuth sodium titanate – potassium stronsium zirconate (BNT-BKT-SZ) were fabricated by solid-state reaction effect sintering temperature with soaking times 2, 4, 6 h at 1150C structural, density, porosity, was examined. phase formation examined using X-ray diffraction (XRD). Scanning electron...

The properties of modified Bi 0.5 Na TiO 3 (BNT) based lead-free ceramics were investigated. BNT-based prepared by a solid-state mixed oxide method Phase formation was determined X-ray diffraction technique (XRD). analysis the suggested that all samples exhibited perovskite structure without second phase. value dielectric constant increased with increasing in sintering temperature. Moreover, high temperatures could improve ferroelectric BNT base ceramics.

Fuel cell is an electrochemical which converts chemical energy into electricity via reaction of hydrogen and oxygen gases. It also alternative with environmental friendly. Generally, the fuel consists many parts. Electrolyte important part for because it has high ion conductivity leads to increase electrical cell. In case solid oxide cell, barium cerate-based ceramics have been much attention due their good properties this work, BaCe 1- x Y O 3-δ ( = 0.20) ceramic was synthesized by a state...