Abstract The solid-state sintering technique has been implemented to synthesize (K 0.5 Na NbO 3 )-0.02(LiSbO ) (KNN-LS) Pb-free ceramic. crystal structure, dielectric and ferroelectric properties of the prepared material were investigated. Pure orthorhombic perovskite phase [ I (220) / (002) = 1.68] with Amm2 space group detected at room temperature for sintered Two anomalous permittivity peaks...

Compared to batteries and electrochemical capacitors, dielectric capacitors are widely studied because of their huge advantages in terms charging/discharging speed power density. In this work, high-entropy (Bi0.2Na0.2Sr0.2Ba0.2Ca0.2)TiO3 lead-free relaxor-ferroelectric ceramics were prepared by both conventional sintering (CS) spark plasma (SPS). The results showed that the ceramic SPS obtained...

Abstract The ceramic composites BaTiO 3 @Ni, composed of a conducting nickel and highly resistive ferroelectric phase, exhibiting positive temperature coefficient electrical resistivity (PTCR), are prepared using conventional method at less than 1000 °C. @Ni show jump-like PTCR effect in by about eight orders magnitude ( ρ max / min ≈ 10 8 ) with < 1 Ωcm. This is the first example standard e...

Ferroelectric materials are heavily used in electro-mechanics and electronics. Inside the ferroelectric, domain walls separate regions in which the spontaneous polarization is differently oriented. Properties of ferroelectric domain walls can differ from those of the domains themselves, leading to new exploitable phenomena. Even more exciting is that a non-ferroelectric material may have domain...

The ferroelectric relaxor behavior in Bi-doped SrTiO3 was studied in the temperature range 1.5–300 K and up to 400 MHz. Some interesting results are shown: ~1! Typical ferroelectric relaxor behavior develops out of the other impurity relaxation modes. The ferroelectric relaxor peaks occur on the quantum-paraelectric background. The polarization irreversibility effect observed after field coolin...

The effect of sintering condition on structure, microstructure, and ferroelectric properties ([Formula: see text][Formula: text] text]- O 3 (KNL–NTS) has been investigated. Ceramic powders have synthesized by the solid-state reaction method sintered at different temperatures (1115[Formula: text]C, 1125[Formula: 1140[Formula: text]C). Then, samples were characterized thermogravimetric analysis, ...

The large electrocaloric coupling in PbZrO3 allows using high-speed infrared imaging for visualizing anti-ferroelectric switching dynamics via the associated temperature change. It is found that ceramic samples of homogeneous and thickness, fast due to generation multiple nucleation sites, with devices responding millisecond range. By introducing gradients however, it possible change propagatio...