Structural,optical, magnetic,and photoluminescence properties of Sn0.7−xMo0.3 NdxO2+δ (0.0 ≤ x ≤ 0.3)

Journal of Materials Science: Materials in Electronics - In this study, the properties of a series of (Sn0.7?xMo0.3 NdxO2+δ) (0.0?≤?x?≤?0.3) Nd3+ thin...     

Microstructure,optical and dielectric properties of cobalt-doped zinc ferrite nanostructures

Journal of Materials Science: Materials in Electronics - In the present work, we have explored the physical properties of ZnFe2?xCoxO4 (0?≤?x?≤?0.06)...     

Structure evolutions with enhanced dielectric permittivity and ferroelectric properties of Ba(1−x)(La,Li)xTiO3 ceramics

Journal of Materials Science: Materials in Electronics - Polycrystalline Ba(1?x)(La0.50Li0.50)xTiO3 (0?≤?x?≤?0.12) ceramics are fabricated via the...     

Enhanced relative cooling power of lanthanum-deficiency manganites La0.77−xMg0.23MnO3 (0 ≤ x ≤ 0.2): structural,magnetic and magnetocaloric properties

Journal of Materials Science: Materials in Electronics - Polycrystalline compounds La0.77?xMg0.23MnO3 (0?≤?x?≤?0.2) were elaborated using the ceramic...     

Effect of Sr substitution on structural properties of LaCrO3 perovskite

Journal of Materials Science: Materials in Electronics - We present the structural studies of perovskite-type La1?xSrxCrO3 (0?≤?x?≤?0.30) compounds...     

The investigation of structural and magnetic properties of Er2−xCoxO3 nano-oxides

Journal of Materials Science: Materials in Electronics - The sol–gel technique was used to synthesize Er2?xCoxO3 (0.0?≤?x?≤?0.30) mixed oxides to...     

Cold sintering optimized LiF microwave dielectric ceramics for the development of dielectric resonator antennas at 5G millimeter-wave band

Journal of Materials Science: Materials in Electronics - Dense LiF ceramics have been successfully prepared via a cold sintering process (100 °C?≤?T?≤?200...     

On I–V measurements and high field conduction of (Se80Te20)94−xGe6Bix (0 ≤ x ≤ 12) chalcogenide alloys

Journal of Materials Science: Materials in Electronics - (Se80Te20)94?xGe6Bix (0?≤?x?≤?12) chalcogenide alloys were prepared by melt quenching technique....     

Synergistic effect of SiO2 on proton conduction and thermal behavior for nanocomposite electrolyte CsH2PO4 fuel cells

Journal of Materials Science: Materials in Electronics - Solid acid composite electrolytes (1?x)CsH2PO4(CDP)/xSiO2 (0?≤?x?≤?0.35) were prepared and...     

Complex (Mg1/3Ta2/3)4+ ionic substitution on the phase structure and microwave dielectric properties of wolframite MgZr1−x(Mg1/3Ta2/3)xNb2O8 (0 ≤ x ≤ 0.08) ceramics

Journal of Materials Science: Materials in Electronics - In this study, single-phase MgZr1?x(Mg1/3Ta2/3)xNb2O8 (0?≤?x?≤?0.08) ceramics with monoclinic...     

Microwave dielectric properties of non-stoichiometric Sr1 + xNd2Al2O7 + x ceramic prepared by reaction-sintering process

Journal of Materials Science: Materials in Electronics - Sr1?+?xNd2Al2O7?+?x (0?≤?x?≤?0.04) ceramics were prepared using a more concise...     

Dissolution and geopolymerization of synthetic fly ash glass

Journal of Materials Science - Two fly ash glasses were synthesized and dissolved in KOH at a water/solid ratio of?≤?0.3. We measured reaction kinetics, gel formation, and...     

Valence States of B-Site Cation and Their Correlation to Magnetic Phase Transition in La2-xSrxNiRuO6

Journal of Superconductivity and Novel Magnetism - La2-xSrxNiRuO6 (0?≤?x?≤?1) samples were successfully synthesized by standard solid-state reaction method. The...     

Optical and Magnetic Behaviors of Ru-Doped ZnO Nanoparticles

Journal of Superconductivity and Novel Magnetism - This work uses the co-precipitation method for the synthesis of Zn1-xRuxO nanoparticles, with (0?≤?x?≤?0.04)....     

Improved Magnetoresistance in Sm0.7-xCexSr0.3MnO3 Manganites Prepared by a Sol–Gel Route

Journal of Low Temperature Physics - In this work, manganite ceramics of Sm0.7-xCexSr0.3MnO3 (0?≤?x?≤?0.3) are prepared by a citrate sol–gel chemical route...     

Buoyancy-driven convective heat transfer from a semi-circular cylinder for various confinements

Buoyancy-driven convective heat transfer from a semi-circular cylinder for various confinements has been studied using numerical simulations for wide ranges of parameters, Reynolds numbers (1?≤?Re?≤?50), Richardson numbers (0?≤?Ri?≤?2), Prandtl numbers (0.7?≤?Pr?≤?50) and confinement ratios (0.2?≤?β?≤?0.8). A hot semi-circular cylinder is symmetrically kept in a 2D rectangular confinement. The circular side of the cylinder faces the upstream flow and the fluid flows against gravity in the channel. The governing equations are numerically solved using FLUENT and the results obtained are presented in the form of isotherms, streamlines, pressure coefficients, drag coefficients, Nusselt numbers, etc. The highest value of pressure coefficient increases with blockage ratio for all cases. The drag coefficient decreases with Re and shows complex phenomena with change in Ri and blockage ratio of the channel. Pressure drag has contributed more as compared with viscous drag in all cases. The curved surface showed more heat transfer than the flat surface of the semi-circular cylinder. The value of β also has great influence at large value of Peclect numbers (=?2500). Overall average heat transfer in terms of average Nusselt number is a function of Ri, Re, Pr and β.     

Electrical and oxygen sensing properties of Nd<Subscript>1−x</Subscript>Ba<Subscript>x</Subscript>CoO<Subscript>3</Subscript> ceramics

Nd_1?xBa_xCoO₃ (0?≤?x?≤?0.2) ceramics was synthesized by solid state reaction. All the samples have an orthorhombic perovskite structure (Space group P n m a). The electrical transport property indicates that Ba doped NdCoO₃ ceramics goes through semiconductor–metal phase transition. The electrical resistivity of Nd_1?xBa_xCoO₃ (0?≤?x?≤?0.15) ceramics decreases, while the electrical resistivity of Nd_0.8Ba_0.2CoO₃ ceramics increases with the increase of temperature. The chemical-sensing property shows that Nd_1?xBa_xCoO₃ ceramics is very sensitive to oxygen. Also, increasing Ba²⁺ doping concentration can reduce the oxygen desorption rate and increase the sensitivity of resistivity. These results indicate that Ba²⁺ doped NdCoO₃ ceramics is not only the good candidate of the cathode materials of solid fuel cells but also the good materials of gas sensor devices.     

A study of the influences of transition metal (Mn,Ni) co-doping on the morphological,structural and optical properties of nanostructured CdO films

In this paper, a systematic investigations on the effects of transition metals such as Mn and Ni-dopant on physical properties of cadmium oxide (CdO) thin films coated on soda lime glass substrates by using SILAR method have been reported. The characterizations of un-doped, Mn-doped (Cd_0.99 Mn_0.01O) and Mn/Ni double doped CdO [(Cd_0.99?xMn_0.01Ni_xO)(0?≤?x?≤?0.001)] films were investigated by SEM, EDX, XRD and UV–Vis spectrophotometry to determine the morphological, structural and optical properties, respectively. SEM analysis showed that the surface morphologies of the CdO films were influenced by Mn doping and Mn/Ni co-doping. The EDX result verified the presence of expected elements Cd, O, Mn and Ni in the growing solution. The crystal phases of the samples and their crystallinity quality have been investigated by XRD measurements. The X-ray diffractograms show all the diffraction peaks are highly intense also they demonstrate the preferential orientations of (111) and (200) directions. Optical investigations revealed red shift with Mn doping and Mn/Ni co-doping in the absorbance spectrum.     

Increased fatigue strength of partially stabilised zirconia achieved by shot peening

The effects of shot peening (SP) on the fatigue strength of partially stabilised zirconia were studied. Smooth specimens and specimens containing a surface pre-crack with depths in the range 35–110?μm were subjected to SP. The cyclic fatigue tests were performed using a three-point bending setup. SP introduced compressive residual stresses on the specimens and improved their fatigue strengths. The shot peened specimens with pre-crack depths?≤?50?μm fractured outside the pre-crack area and exhibited considerably high fatigue limits, equivalent to those of the shot peened smooth specimens. Therefore, the pre-cracks with depths?≤?50?μm could be rendered harmless by SP, which was confirmed by the theoretical estimations based on fracture mechanics.     

Influence of copper doping on structural and dielectric response on sodium lithium tri titanates (Na1.9Li0.1)Ti3O7:X Cu (0.0?≤?X?≤?0.1)

Pure and Cu-doped [(Na_1.9Li_0.1) Ti₃O₇XCu (0.01?≤?X?≤?1.0)] layered ceramics are prepared via the conventional solid state reaction method. The microstructure, dielectric properties and ac conductivity of copper doped (Na_1.9Li_0.1) Ti₃O₇ have been investigated. The XRD results indicate that copper ions enter the unit cell maintaining the layered structure of solid solution. The dependence of loss tangent (tanδ) and relative permittivity (ε_r) on temperature range (373–573?K) and frequency ranges (100?kHz–1?MHz) have been repeated for [(Na_1.9Li_0.1) Ti₃O₇]XCu (0.01?≤?X?≤?1.0)]. The dielectric losses in copper doped derivatives of layered (Na_2-xLi_xTi₃O₇) (where X?=?0.1) ceramic are the cooperative contribution of electrical conductions, dipole orientation and space change polarization. The peaks of relative permittivity at high temperature indicate a possible ferroelectric phase transition. It is observed that low doping of paramagnetic ions (Cu²⁺) enhances electron hopping (polaron) conduction and impedes the interlayer ionic conduction. However, electron hopping conduction is dominant over lower temperature region, but as temperature raises interlayer ionic conduction begins to prevail.