Outstanding electrical properties of solids are often due to the composition heterogeneity and/or the competition between two or more sublattices. This is true for superionic and superprotonic conductors and supraconductors, as well as for many ferroelectric materials. As in PLZT ferroelectric materials, the exceptional ferro- and piezoelectric properties of the PMN-PT ((1-x)PbMg1/3Nb2/3O₃-xPbT...

Multiferroic ceramic composites have been engineered to incorporate multiple desired physical properties within a single component. The objective of this study was create such through pressure less sintering ferroelectric-doped PZT and nickel–zinc ferrite at temperature 1250 °C. growth grains found be influenced by the concentration ferroelectric phase. Consequently, an increase in content decr...

The lattice dynamics of the Sr 0.5 Ba Nb 2 O 6 (SBN-50) ceramic was studied using Raman spectroscopy in temperature range 80-700 K with a step 10 K. analysis spectra ν=50-1000 cm -1 revealed features dependence behavior optical modes frequencies associated displacement Ba, and atoms from their average positions crystal lattice, which is macroscopic phase transition paraelectric to ferroelectric...

In this work, the effects of Sb doping on electrical conductivity fine-grain 0.9(K0.5Na0.5)(Nb1−xSbx)O3-0.1Bi(Ni2/3Nb1/3)O3 (KNNSx-BNN) ceramics were systemically investigated. It was found that grain size decreases from ~900 nm (x = 0) to ~340–400 0.06–0.08), and then increases again ~700 0.10). This is because solubility limit about 0.08 in ceramic, more will facilitate growth as sintering ai...

Electric field driven phase transformations require two phases with a mismatch in their electric polarization, as seen antiferroelectric-to-ferroelectric transformations, where the ferroelectric has permanent polarization that is favored under field. Many other nonferroelectric dielectric materials can become electrically polarized according to electrical susceptibility, yet such induced polari...

This paper focuses on the development of the new BiScO3-PbTiO3 (BS-PT) based piezoelectric ceramic transducers for high-temperature SHM applications. By controlling the PbO deficiency in the material system, we modify the lossy ferroelectric properties and enhance the piezoelectric responses from the intrinsic BSPT. The new in-house fabricated piezoelectric transducers can maintain comparably h...

Monophase intergrowth Bi3TiNbO9–Bi4Ti3O12 BTN-BIT ceramics were synthesized by solid-state reaction method. In the temperature dependence of dielectric permittivity, two anomalies appeared at 945 and 1114 K, respectively. The ferroelectric hysteresis loop measurement revealed that the 2Pr is 20 C/cm 2, nearly as twice as that of the BTN ceramic. The crystal structure analysis indicated that the...

Dielectric ageing behaviors of lead-based relavor ferroelectric ceramics, which may affect their application in multilayer ceramic capacitors (MLCs), have been an important research problem for many years. In this paper, the effects of annealing on ageing properties of the PMN-O.1PT system, respectively doped with Fe, CO and Ni ions and annealed in different atmospheres (air and Nz-Hz) after si...