Dielectric, pyroelectric, and ferroelectric studies in (1 - )AgNbO-FeNbO lead-free ceramics.

In the present study, the effect of heterovalent Fe ions on the dielectric, pyroelectric, and ferroelectric properties of the (1 - )AgNbO-FeNbO ( = 0.005, 0.01, 0.

Enhanced energy storage performance in reaction-sintered AgNbO antiferroelectric ceramics.

In this research, AgNbO ceramics were produced by two sintering methods: reaction sintering (RS) and conventional solid-state sintering (CSSS). The process was similar for both methods, except that in RS, AgO and NbO precursors were mixed, then formed into pellets, skipping the calcination step, and sintered at 1100 °C for 6 hours. Both prepared ceramics had the same perovskite crystal structure with an orthorhombic crystal system and and 2 space groups with similar lattice dynamic vibration modes at room temperature.

GHz-THz Dielectric Properties of Flexible Matrix-Embedded BTO Nanoparticles.

BaTiO (BTO) nanoparticles produced by wet chemistry methods were embedded in several types of flexible materials in order to fabricate flexible electronic devices. Starting from the produced nanoparticle dielectric properties, flexible material dielectric properties were tested for high electromagnetic frequencies (30 GHz-2 THz) using time domain spectroscopy. Dielectric performances of the different materials obtained with variable nanoparticle concentrations up to 40 wt.

A Vanadium Dioxide-PMMA Composite For Microwave Radiation Switching.

Reconfigurable radio-frequency components are in high demand for modern communication systems as they can be involved in multiband and multistandard electronic devices. The key part of such components is an active switching element. This work offers a way to obtain an efficient microwave switch using vanadium dioxide-poly (methyl methacrylate) composite.

Crystal structure of poly[[di-aqua-tetra-μ-cyanido-platinum(II)iron(II)] methanol 4/3-solvate]: a three-dimensional Hofmann clathrate analogue.

In the title polymeric coordination compound, {[FePt(CN)(HO)]·1.33CHOH} , the Fe cation (site symmetry 4/) is coordinated by the N atoms of four cyanide anions (CN) and the O atoms of two water mol-ecules, forming a nearly regular [FeNO] octa-hedron. According the Fe-N and Fe-O bond lengths, the Fe atom is in the high-spin state.

Spin crossover in 2D iron(ii) phthalazine cyanometallic complexes.

Two new 2D spin-crossover (SCO) analogues of Hofmann clathrates of composition [Fe(phth)2MII(CN)4] (where phth = phthalazine; MII = Pd, Pt) have been synthesized and their structures and switchable behaviour have been characterized. Single-crystal X-ray analysis reveals that the Pt and Pd derivatives contain FeII centres equatorially surrounded by four equivalent μ4-[MII(CN)4]2- groups. Two crystallographically equivalent phthalazine (phth) ligands occupy the axial positions of each FeII site, completing its octahedral coordination environment.