Titanate-based high-entropy perovskite oxides relaxor ferroelectrics.

Different combinations of monovalent and trivalent A-cations in high-entropy perovskite oxides (HEPOs) were investigated. The multicomponent (A'A″BaSrCa)TiO (A' = Na, K, A″ = Bi, La) perovskite compounds were successfully synthesized by solid-state reaction method persisting average cubic perovskite phase. The trivalent cation exhibited distinct effects on local structure, dielectric properties and relaxor ferroelectric behavior.

Application of the van der Pauw method for electrical conductivity measurements at high temperatures using an insulating compressing ring.

High quality data on the high temperature electrical properties of ceramics, particularly oxides, is of great value for material selection, design, and modeling for a broad range of emerging applications. Utilizing the mismatch in the coefficient of thermal expansion between two materials, a purely mechanical method for establishing electrical contact in the van der Pauw geometry to measure the bulk resistivity of ceramic disks at high temperatures is presented. Measurements of a reference material, 20 mol.

Dielectric Properties of x BiInO₃-(1-x) Pb(Zr₀.₅₂Ti₀.₄₈)O₃ Solid Solutions.

This study focused on the synthesis and electrical property measurements of the lead zirconate titanate (PZT)-bismuth indate (BI) perovskite solid solution system. As the PZT binary system is a very well-developed and integrated materials system, identifying new ternary systems based on PZT would allow for a new dimension of control into the exploration and improvement of its electrical properties, which could enable enhancements in the performance of current technology and devices. Here, the solid solution of BiInO-PbZrO-PbTiO ( x BI-(1- x ) PZT 52/48) was explored.

Neutron Total Scattering Studies of Group II Titanates (ATiO, A = Mg, Ca, Sr, Ba).

Neutron total scattering measurements were conducted on MgTiO, CaTiO, SrTiO, and BaTiO to simultaneously investigate the local and average structure of these materials. The local structures of MgTiO, CaTiO, and SrTiO were well modelled using the refined average structural models: trigonal R[Formula: see text], orthorhombic Pbnm, and cubic Pm[Formula: see text]m respectively. However the local structure for BaTiO, at both temperatures where the average structure is orthorhombic Amm2 and tetragonal P4mm, was best described by the rhombohedral R3m model.

Effects of NiO nanoparticles on the magnetic properties and diffuse phase transition of BZT/NiO composites.

A new composite system, Ba(Zr0.07Ti0.93)O3 (BZT93) ceramic/NiO nanoparticles, was fabricated to investigate the effect of NiO nanoparticles on the properties of these composites.

High-K (Ba0.8Bi0.2)(Zn0.1Ti0.9)O3 ceramics for high-temperature capacitor applications.

Solid solutions of BaTiO(3)-Bi(Zn(1/2)Ti(1/2))O(3) were investigated for high-temperature capacitor applications. Compositions close to 0.8BaTiO(3)-0.

Piezoelectric properties and unipolar fatigue behavior of KNN-based Pb-free piezoceramics.

Single-phase perovskite ceramics were synthesized using a Pb-free (K(0.44)Na(0.52)Li(0.

Structure and ferroelectric properties of Bi(Zn(1/2)Ti(1/2))O3-(Bi(1/2)K(1/2))TiO3 perovskite solid solutions.

Lead-free piezoelectric ceramics based on chiBi(Zn(1/2)Ti(1/2))O3-(1-chi)(Bi(1/2)K(1/2))TiO3 were obtained via solid state processing techniques. A single perovskite phase with tetragonal symmetry was obtained for Bi(Zn(1/2)Ti(1/2))O3 (BZT) substitutions up to 20 mol%. The maximum density was 97.