High energy storage density in high-temperature capacitor films at low electric fields.

High-power applications, particularly in electromagnetic catapults, electric vehicles, and aerospace, necessitate the use of polymer dielectrics that demonstrate reliable performance in high-temperature environments. This study focuses on synthesizing three distinct morphologies of innovative wide-bandgap high-dielectric materials-hydroxyapatite (HAP). By conducting a combination of experiments and Multiphysics finite element simulations, a comprehensive comparison was made regarding the properties exhibited by three polyimide (PI) composites: PI/sea urchin-like HAP, PI/spherical HAP, and PI/rodlike HAP.

Superior Energy-Storage Performances under a Moderate Electric Field Achieved in Antiferroelectric-like NaBiTiO-Based Relaxor Ferroelectric Ceramics by a Synergistic Optimization Strategy.

The progress of power systems and electronic devices promotes the development of lead-free dielectric energy-storage material. Particularly, NaBiTiO-based ferroelectric ceramics featuring large spontaneous polarization as well as wide dielectric adjustability and stability are highly recognized as promising candidates. However, their large remanent polarization () and low electric breakdown strength () result in unsatisfactory recoverable energy density () and/or energy conversion efficiency (η), severely restricting their energy-storage applications.

Significantly Enhanced Energy Storage Performance in High Hardness BKT-Based Ceramic via Defect Engineering and Relaxor Tuning.

Hybrid electric cars and pulsed power technologies have increased the demand for capacitors with high energy density, wide temperature stability, high operating voltage, and good mechanical qualities. In this work, (1 - ) (0.6BiKTiO-0.

Achieving ultrahigh energy storage density and efficiency in 0.90NaNbO-0.10BaTiO ceramics a composition modification strategy.

Ceramic capacitors feature great power density, fast charge/discharge rates, and excellent thermal stability. The poor energy storage density of ceramic capacitors, on the other hand, significantly limits their application in power systems. In this work, a high recoverable energy storage density of = 2.

Ferroelectric-Relaxor Crossover and Energy Storage Properties in SrNaNbO-Based Tungsten Bronze Ceramics.

Filled and unfilled SrNaNbO-based tungsten bronze ceramics based on Gd doping were prepared using a traditional solid-state reaction method. Relaxor behaviors of the two different systems were analyzed, and the corresponding energy storage performance was also characterized. With the support of weakly coupled polar nanoregions and a non-polar matrix, an energy storage density of 2.

Crystal Chemistry, Raman Spectra, and Bond Characteristics of Trirutile-Type CoTiTaO Microwave Dielectric Ceramics.

A novel trirutile-type CoTiTaO ceramic was reported here for the first time. The correlations between the sintering behavior, crystal structure, chemical bond, and dielectric properties were investigated. Pure CoTiTaO ceramic was synthesized in the temperature range of 1000-1100 °C.

Influence of (AlW) co-substitution for Nb in NdNbO and the impact on the crystal structure and microwave dielectric properties.

NdNb1-x(Al1/3W2/3)xO4 (x = 0.03-0.07) solid solution compounds were synthesized and characterized via solid-state reaction.

Structural Evolution and Microwave Dielectric Properties of xZnTiNbO-(1- x)ZnNbTiO Ceramics.

Structure and microwave properties of xZnTiNbO-(1 - x)ZnNbTiO ceramics in the range of x = 0.0-1.0 were investigated.

Photocatalytic activity of attapulgite-TiO-AgPO ternary nanocomposite for degradation of Rhodamine B under simulated solar irradiation.

An excellent ternary composite photocatalyst consisting of silver orthophosphate (AgPO), attapulgite (ATP), and TiO was synthesized, in which heterojunction was formed between dissimilar semiconductors to promote the separation of photo-generated charges. The ATP/TiO/AgPO composite was characterized by SEM, XRD, and UV-vis diffuse reflectance spectroscopy. The co-deposition of AgPO and TiO nanoparticles onto the surface of ATP forms a lath-particle structure.

Improved Thermoelectric Performances of SrTiO3 Ceramic Doped with Nb by Surface Modification of Nanosized Titania.

Nb-doped SrTiO3 ceramics doped with the surface modification of nanosized titania was prepared via liquid phase deposition approach and subsequent sintered in an Ar atmosphere. The surface modification of nanosized titania significantly improved the ratio of the electrical conductivity to thermal conductivity of SrTiO3 ceramic doped with Nb, and has little impact on the Seebeck coefficient, thus obviously improving the dimensionless thermoelectric figure of merit (ZT value). The surface modification of nanosized titania is a much better method to lower the thermal conductivity and to enhance the electrical conductivity than the mechanical mixing process of nanosized titania.

Simulations and analysis of a piezoelectric micropump.

A number of micropumps have been proposed in the last few years based on different actuating principles and fabricated by different technologies. However, many of those micropumps have been designed taking into account primarily available microfabrication technologies rather than appropriate pump performance analysis. In fact, not all papers are available in the literature presenting theoretical models usable to describe the functioning and predict the performance of those micropumps.