Poled and unpoled ferroelectric lead zirconate titanate (“soft” PZT) samples were subjected to incremental compressive stresses up to 270 MPa to examine the mechanisms by which this type of ceramic responds to large static loads. Data indicate abundant ferroelastic switching leading to substan...

Optical emission spectra in the 300–700 nm range were collected from four perovskite-structured materials (CaTiO3, SrTiO3, BaTiO3 and CaZrO3), a pyrochlore-structured material (La2Zr2O7) and zirconolite (CaZrTi2O7), using either a Febetron 706 variable energy pulsed-electron-beam generator (pul...

The performance of ferroelectric ceramics is governed by the ability of domains to switch. A decrease in the switching ability can lead to degradation of the materials and failure of ferroelectric devices. In this work the dynamic properties of domain reorientation are studied. In situ time-of-f...

Ferroelastic domain switching in a soft lead zirconate titanate (PZT) ceramic is measured by neutron diffraction on the texture diffractometer HIPPO with mechanical compression applied in situ. Complete orientation distribution functions are measured by time-of-flight neutron diffraction and rep...

Nano sized zinc ferrite (ZnFe2O4) particles have been synthesized by a simple solution combustion method and its electrochemical sensing application has been reported after modifying the glassy carbon electrode with thin film of zinc ferrite. The nanoparticles have been characterized by FTIR, XR...

Cadmium doped barium zirconate titanate (Ba1−xCdx)(Zr0.13Ti0.87)O3 (BCDZT) ferroelectric ceramic compositions with x=0, 0.02, 0.04 and 0.06 have been prepared by solid state reaction method. X-ray diffraction studies reveal a pseudocubic structure. For increasing Cd content, the bulk ceramic mic...

Lead nickel niobate–lead zirconate titanate (PNNZT) and cadmium doped (CdPNNZT) with general composition Pb1.0(Ni0.167Nb0.333Zr0.155Ti0.345)O3 (PNNZT), Pb0.98Cd0.02(Ni0.167Nb0.333Zr0.155Ti0.345)O3 (CdPNNZT) respectively were prepared by conventional solid state reaction. Microstructural and com...

Selenides and tellurides of uranium have been prepared by solid-vapour reaction and densified by melting. Melting points were estimated and some structures were determined by X-ray analysis. Electrical resistivities, Hall coefficients, and thermoelectric powers of specimens of compounds were mea...

The synthesis and crystal structures of the ternary uranium compounds UYX, where Y = Si, Ge, Sn, Sb, and X = S, Se, Te, are reported. USiS, UGeS, USnTe, USbS, USbTe and also UTe2 − x are isotypic with ZrSiS which has a distorted PbFCl-type structure. USiSe, UGeSe and UGeTe have structures of a n...

The new ternary uranium telluride Tl0.56UTe3 crystallizes in the orthorhombic system (a = 4.212(2) Å, b = 23.287(7) Å, c = 6.091(3) Å), space group Cmcm. The structure was solved from X-ray diffraction data collected from a single crystal grown by the chemical vapor transport method. The stru...

The magnetic and some related physical properties of the uranium dichalcogenides are summarized and discussed with regard to their crystal structure. The theoretical magnetic susceptibility calculated on the basis of the usual crystal-field theory is compared with the experimental data. The calc...

Nineteen new uranium complexes, eighteen of which contain the element in the very unusual oxidation state of five, and one of which contains quadrivalent uranium complexed for the first time by an arsenic donor ligand, are reported. The novel uranium(V) compounds include, for the first time, lig...

Low-temperature (5 to 350 K) heat capcity, fluorine combustion, and high-temperature (350 to 1500 K) drop-calorimetric measurements have been performed on a specimen of zirconium ditelluride ZrTe2. Thermodynamic quantities are reported at T = 298.15 K: the standard molar enthalpy of formation, Δ...

Single crystals of the title compound up to a size of 5 mm were available from the elements via chemical transport reactions with TeBr4as transporting agent. The analysis by atomic emission spectrometry gave UTe1.99(5), i.e., stoichiometric composition. By single-crystal structure analysis we co...

The structure of stoichiometric uranium ditelluride, UTe2, has been determined by X-ray powder methods. The compound is orthorhombic, space group Immm; a = 4.1617; b = 6.1276; c = 13.965 Å. Uranium is coordinated by eight tellurium atoms (average distance UTe = 3.17 Å) forming a trigonal pri...

The thermoelectric properties of Sr2Si, Sr5Si3, and their composites are reported. Sr2Si-Sr5Si3 composites were synthesized by partial decomposition of Sr2Si to Sr5Si3 during spark plasma sintering. Semiconducting Sr2Si grains were surrounded by boundary regions composed of smaller grains of Sr2...

The thermodynamics of the Sr–Si system is of fundamental importance for the understanding of eutectic modification of Al–Si alloys. At the same time, strontium silicides have recently been found to have potential applications in electronic devices. Renewed research efforts have led to a re-eva...

The high temperature vaporization processes of strontium silicides were studied by means of the Knudsen Effusion Mass Spectrometry and Knudsen Effusion Weight Loss techniques in the temperature range 665–1300 K, with reference to the recent reinvestigation of the Sr–Si phase diagram [Palenzona...

The results of resistivity and magnetoresistivity measurements for U2.67Te4, U3Y5 (where Y=S, Se), αUS2, βUS2 and UTe2 single crystals are reported. The temperature dependencies of the electrical resistivity reveal semiconducting properties for all the investigated samples with the exception o...

Triscyclopentadienyl uranium (IV) thiolates were prepared by two principal methods namely (1) substitution of the chloride group of [U(cp)3(Cl)] (cp = η-C5H5) by Sr− and (2) oxidation of the trivalent precursors [U(cp)3(THF)] (THF = tetrahydrofuran), [U(C5H4SiMe3)3] and [U(C5H4tBu)3] with the d...