Single-phase Bi1−xNdxFeO3 (BNFOx) (x=0–0.2) multiferroic ceramics were prepared to study the effects of Nd substitution on their crystal structure and ferroelectromagnetic behavior. Rietveld refinement x-ray diffraction data showed a continual transformation from rhombohedral BNFOx=0 (BiFeO3) triclinic in BNFOx=0.05–0.15 pseudotetragonal BNFOx=0.175–0.2. Ferroelectromagnetic measurements revealed existence ferroelectricity with remnant polarization ∼9μC∕cm2 BNFOx=0–0.175, paraelectricity...

Time-to-failure (TTF) prognostic plays a crucial role in predicting remaining lifetime of electrical machines for improving machinery health management. This paper presents novel three-step degradation data-driven TTF prognostics approach rolling element bearings (REBs) machines. In the feature extraction step, multiple features, including statistical intrinsic energy and fault frequency are extracted to detect phenomenon REBs using complete ensemble empirical mode decomposition with...

Under the pressure of climate change, demands for alternative green hydrogen (H <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> ) production methods have been on rise to conform global trend transition a H society. This article proposes multirenewable-to-hydrogen method enhance efficiency renewable-dominated fueling stations (HFSs). In this method, aqueous electrolysis native biomass can be powered by wind and solar generations based...

Single-phase Bi0.875Sm0.125FeO3 ceramics were prepared, and their crystal structure multiferroic properties studied. The triclinic with P1 space group was confirmed in the by refining x-ray diffraction data. Large piezoelectric d33 coefficient of 29pC∕N, together high remnant polarization 15.09μC∕cm2, measured at room temperature, suggesting existence long-range ferroelectric order on a macroscopic scale. observed small magnetization 0.071emu∕g temperature as result collapse space-modulated...

Single-phase multiferroic Bi1−xNdxFeO3 (x=0–0.15) ceramics are polarized and their piezoelectric pyroelectric effects reported. The success in polarizing the originates from low electrical conductivities controlled predominantly by Poole-Frenkel conduction mechanism. Limited internal traps due to reduced oxygen vacancies result sufficiently leakage current densities of &amp;lt;30mA∕m2 even at a high electric field 145kV∕cm. d33 coefficients before after annealing 550°C for 4h measured be ∼28...

Single-phase Bi1−xNdxFeO3 (BNFOx) (x=0–0.2) multiferroic ceramics were prepared to study the effects of Nd substitution on their crystal structures, Raman scattering spectra, and ferroelectric properties. Rietveld refinement x-ray diffraction data showed a gradual change in structure from rhombohedral pseudotetragonal via triclinic with increasing x. The evolvement normal modes x suggested that such structural is accompanied by weakening long-range order. simultaneous occurrence abrupt mode...

Bi1−xLaxFeO3 (x = 0–0.25) multiferroic ceramics were prepared to study the compositional driven structural transformation and ferroelectric– paraelectric phase transition. Rietveld-refined crystal structure parameters revealed existence of a rhombohedral R3c symmetry in BiFeO3, triclinic P1 Bi0.95La0.05FeO3, Bi0.9La0.1FeO3 Bi0.85La0.15FeO3, pseudotetragonal P4mm Bi0.8La0.2FeO3 P4/mmm Bi0.75La0.25FeO3. La substitution led ferroelectric–paraelectric transition accompanying abrupt changes Raman...

Remaining useful life (RUL) prognosis is of great significance to improve the reliability, availability, and maintenance cost an industrial equipment. Traditional machine learning method not fit for dealing with time series signals has low generalization stability in prognostic. In this article, a novel ensemble long short-term memory neural network (ELSTMNN) model RUL prediction proposed enhance accuracy adaptive abilities under different prognostic scenarios. The ELSTMNN contains networks...

Lithium–sulfur batteries are considered potential high-energy-density candidates to replace current lithium-ion batteries. However, several problems remain be solved, including low conductivity, huge volume change, and a severe shuttle effect on the cathode side, as well inevitable lithium dendrites anode side. Rare earth compounds, which play vital roles in various industries, show latent capacity hosts or interlayers tackle inherent of lithium–sulfur application rare compounds has not been...

Terfenol-D/epoxy pseudo 1-3 composites were fabricated by embedding and aligning Terfenol-D particles with a size distribution of 10–300μm in passive epoxy matrix using six volume fractions (υf) ranging from 0.22 to 0.72. The dependence the dynamic relative permeability (μr33T), elastic modulus (E3H), strain coefficient (d33) on υf was investigated as function magnetic bias field (HBias). HBias response data showed that built-in non-180° domain states related residual compressive stresses...

Bi 0.825 Nd 0.175 Fe O 3 (BNFO) thin film is grown on Pt∕TiO2∕SiO2∕Si substrate by pulsed laser deposition, and its multiferroic properties are compared with those of BiFeO3 (BFO) film. With limited Fe2+ ions twinborn oxygen vacancies, both samples show low dielectric losses &amp;lt;0.026 at 100Hz high maximum ferroelectric polarizations ∼34μC∕cm2. The coercive field BNFO reduced ∼40%, reaching a value 235kV∕cm, to that BFO due the increased ratio 180° curved domains total better nucleation...

We have found experimentally and theoretically that laminated composites comprising one layer of length-magnetized Tb0.3Dy0.7Fe1.92 (Terfenol-D) magnetostrictive alloy sandwiched between two layers thickness-polarized, electro-parallel-connected 0.7Pb(Mg1∕3Nb2∕3)O3–0.3PbTiO3 (PMN–PT) piezoelectric single crystal a large converse magnetoelectric effect characterized by magnetic induction in response to an applied ac voltage. The reported originates from the product PMN–PT Terfenol-D layer....

Magnetoelectric (ME) laminate composite consisting of optimal crystal cut thickness-polarized piezoelectric 0.7Pb(Mg1∕3Nb2∕3)O3–0.3PbTiO3 (PMN-PT) single and the length-magnetized magnetostrictive Tb0.3Dy0.7Fe1.92 (Terfenol-D) alloy has been fabricated. The optimization PMN-PT greatly enhances longitudinally magnetized-transversely polarized (L-T) mode ME effect, which a superior voltage coefficient αE ∼3.02V∕cmOe in low frequency band. Near resonance 95kHz, dramatically increases reaches...

A ring-type electric current sensor operated in vortex magnetic field detection mode is developed based on a ring-shaped magnetoelectric laminate of an axially polarized Pb(Zr, Ti)O3 (PZT) piezoelectric ceramic ring bonded between two circumferentially magnetized epoxy-bonded Tb0.3Dy0.7Fe1.92 (Terfenol-D) short-fiber/NdFeB magnet magnetostrictive composite rings. The sensitivity the was evaluated, both theoretically and experimentally. showed high nonresonance ∼12.6 mV/A over flat frequency...

Multiferroic nanocomposite films composed of P(VDF-TrFE) copolymer and CoFe2O4 (CFO) nanoparticles have been prepared by a modified polymeric processing. Structural characterizations reveal that CFO with 80–100 nm diameters are well distributed in the matrix. The crystalline microstructure strongly dependent on volume fraction nanoparticles, which further analyzed Raman spectra. Consequently, ferroelectric magnetoelectric responses influenced concentration nanoparticles. A significant...

Three-phase four-wire grid-forming (GFM) inverters are promising to interface distributed energy resources into low-voltage networks. However, these prone overcurrent under grid faults. Physically increasing the inverter current capacity is not cost-effective cope with complicated fault conditions. In this article, an adaptive ride-through (FRT) scheme based on instantaneous saturators and virtual negative- zero-sequence resistances proposed. It features only limitation by modifying voltage...

High activation potential and poor electronic/ionic conductivity greatly hinder the practical application of Li2S as cathode material in lithium-ion sulfur batteries. Introducing electrolyte additives is one most promising strategies to address these challenges. Appropriate not only lower but also promote rate capability cycling performance. In this Perspective, recent research progress on using reduce reviewed, future possibilities are proposed.

Single‐phase and lead‐free Bi 0.85 La 0.15 FeO 3 multiferroic ceramics were prepared by a rapid liquid sintering method to study their crystal structure behaviors. Rietveld refinement of X‐ray diffraction data showed pseudo‐cubic plus small triclinic distortion. The absence Fe 2+ ions suggested few oxygen vacancies. Large polarizations 20.3 μC/cm 2 together with piezoelectric d 33 coefficient ∼27.7 pC/N achieved. This ferroelectricity originates from the stereochemical activity A‐site 3+...

We report experimentally and theoretically the converse magnetoelectric (CME) effect in a three-phase piezoceramic-metal-cap-magnet composite made by sandwiching thickness-polarized Pb(ZrxTi1−x)O3 (PZT) disk between two truncated conical brass caps thickness-magnetized SmCo disks. The reported CME originates from product of piezoelectric PZT disk, mechanical transformation/amplification caps, magnetic induction exhibits large coefficient (αB) excess 2mG∕V with flat response broad frequency...

In this letter we presented a cantilever beam used for vibration energy harvesting based on shear mode 0.71Pb(Mg1/3Nb2/3)O3–0.29PbTiO3 single crystal. The working principle of the device was inferred and factors influencing output were obtained using an analytical method. electrical properties under different conditions studied systematically. Under cyclic force 0.05 N (peak value), peak voltage 91.23 V, maximum power 4.16 mW measured at 60 Hz with proof mass 0.5 g. results demonstrate...