Materials Literature
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Normal spinel ZnCr 2 O 4 undergoes an antiferromagnetic transition at T N =12.5 - 0.5 K. Dielectric constant makes a jump at T N , indicating that an abrupt change in the lattice structure is accompanied with the magnetic transition. X-ray powder diffraction shows that a probable symmetry below T N is an orthorhombic(…
The motion of a filamentary particle and also the discharge from a particle have been extensively investigated for the development of a prevention and protection method against breakdown in gas-insulated switchgear. The particle showed several different patterns of motion, e.g., "standing," precession motion, oscillat…
Previous work has demonstrated how and where the mixing of incompatible brines occurs in waterflooded reservoirs, and what the impact would be on scale prevention strategies in terms of timing and placement of squeeze treatments. This paper extends this work, by modelling the resulting in-situ deposition process. The…
An innovative solid carbonate-oxide composite and related fuel cell technology is reported. The solid carbonate-ceria composite (SCC) electrolytes were found to be highly conductive, with the material conductivity varying from 0.001 to 0.2 S/cm between 400 and 600°C. Fuel cells using these electrolytes reached a power…
The active surfaces of commercially available high temperature corrosion resistant materials can be efficiently characterized using reference reactions such as pyrolysis or metal dusting. The importance of such characterization methods is by far more conclusive than conventional surface analysis. This paper presents e…
Abstract A phenol-based macrocyclic compartmental ligand, (L2;2)2-, having N(amine)2O2 and N(imine)2O2 metal binding sites sharing two phenolic oxygen atoms, has formed the following heterodinuclear MIINiII complexes: [CoNi(L2;2)(AcO)]PF6·CH3CN (1), [NiNi(L2;2)(AcO)]PF6 (2), [CuNi(L2;2)(AcO)]PF6 (3) and [ZnNi(L2;2)(Ac…
The contributing effects of wool fibre morphology have been ignored in early mechanical behavioural models, in which the wool fibre has been treated as a two-phase composite with parallel constituents. Here, the stiffness of wool cells and fibres are modelled in terms of their morphological characteristics and the sti…
Coatings formed on a low carbon steel by a two step hot dipping, primarily in a Zn bath and secondarily in a Zn–6Al bath with or without 0.5 mass% Mg and 0.1 mass% Si addition. The effects of the Mg and Si addition on the surface morphologies, microstructures, and corrosion characteristics of the coatings were investi…
Pseudobinary Pr1−xTbx(Fe0.6Co0.4)2 (0⩽x⩽0.4) cubic Laves single phases have been synthesized by melt spinning and subsequent annealing. Their structure, magnetic properties and stability have been investigated. The composition, at which the anisotropy of Pr1−xTbx(Fe0.6Co0.4)2 is compensated, is close to x=0.1. The spo…
This volume chronicles the proceedings of the 4th International Symposium on Contact Angle, Wettability and Adhesion held in Philadelphia, PA, June 2004. The world of wettability is very wide and it plays a crucial role in many and varied technological areas ranging from microfluidics to biomedical to agriculture to w…
Manufacturing industry uses a large variety of materials for the manufacture of goods today. Among the most important of these are metals, alloys , and plastics . Different kinds of metals and alloys are required for different purposes, and the diagram given below shows some of the metals and alloys that are in common…
The crystal structure and electrophysical properties of the layered intergrowth phase Bi5PbTi3O14Cl have been studied using powder neutron diffraction, ac impedance and second harmonic generation methods. This phase adopts a structure based on a regular intergrowth of Aurivillius-like and Sillén-like blocks in the lay…
The surface of PTFE based implant material could be covalently functionalised with adhesion molecules for improved bio-adhesion by wet chemical oxidation to introduce hydroxy groups followed by cross-linking with cyanuric chloride.
Films of ferroelectric antimony sulphoiodide (SbSI) were grown on platinized silicon substrates by pulsed laser deposition (PLD). The films were grown at room temperature and later annealed at 200-250 C in air for crystallinity. The Curie temperature (T C ) of these films was 17-21 C, whereas the peak dielectric const…
The SiC/Si3N4 sintered materials were prepared by Spark Plasma Sintering at 2000°C. The crystal structure of sintered materials is cubic β-SiC type with relative density higher than 80%. All sintered materials show n-type conduction and the carrier concentration increases with increasing Si3N4 concentration. Seebeck c…
To overcome poor product yields and stability in aqueous solution, we have examined the chloroperoxidase (CPO from Caldariomyces fumago ) catalyzed oxidation of styrene in organic media using tert -butyl hydroperoxide as external oxidant. CPO's intrinsic catalytic activity in tert -butanol, as reflected in its k cat v…
The alloying effects on the stability of vanadium hydrides have been investigated systematically for binary V–M and ternary V–Ti–M alloys, where M’s are various alloying elements. The PCT curves for the β phase (V2H or VH) are measured at low hydrogen pressures using an electrochemical method. On the other hand, for t…
A modified sessile drop method was developed to obtain the precise density values for liquid nickel and nickel-chromium alloy in liquid and solid-liquid coexistence states. The density of liquid nickel decreases linearly with increasing temperature in the range from the melting point to 1923 K. The density at the melt…
The ion adsorption/desorption processes initiated by LC filling in liquid crystal (LC) cells are studied. The LC we used was 5CB and the aligning substrates were UV irradiated polyvinylcinnamate (PVCN) films providing planar alignment of LC. It is shown that intensity of adsorption/desorption processes is strongly det…
ZnS p–n homo junctions have been obtained for the first time with epitaxially grown layers having the structures of n-ZnS:In/p-ZnS:In, Ag, N/p-GaAs and p-ZnS:In, Ag, N/n-ZnS:In/n-GaAs. Both of these structures showed rectifying behavior which is expected for p–n junctions. The forward voltage of 3.7 V where current in…