Materials Literature
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Corrosion at the exposed cut edges of organically coated galvanised steel (OCS) used for construction is one of the primary failure mechanisms. The scanning vibrating electrode technique (SVET) has shown that corrosion is driven by differential aeration when materials are coated with organic over-layers of widely diff…
The evaluation method of stray field loss of engineering oriented loss model (TEAM Workshop Problem 21) is investigated. It is shown that the nonlinear eddy current analysis is obligatory in order to investigate the eddy current loss in the steel plate, because the flux and eddy current in steel are affected by the pe…
Thin films of dicadmium stannate spinel (Cd 2 SnO 4 ) were deposited on glass substrates using a dip‐coating technique. The films were transparent to visible light (90%) and electrically conductive. X‐ray diffractometry showed that annealed films consisted of a single cubic spinel phase only when they were prepared fr…
The structure of Cs 2 ZrSi 3 O 9 synthesized using a sol–gel method was determined from the Rietveld refinement of experimental powder X‐ray diffraction data. The refinement confirmed that this compound was isostructural with wadeite: its structure was hexagonal (space group P 6 3 / m ), and its lattice parameters wer…
To chemically bond β-cyclodextrin (β-CD), which can form inclusion complexes, acrylamidomethyl CD (CD–NMA) obtained from the acid-catalyzed reaction of N-methylolacrylamide (NMA) and β-CD was grafted onto cellulose fibers using CeIV as the initiator. The double-bond content of CD–NMA increased with increase in the NMA…
Beeswax, lauric acid (C12:0, min. 99.0%), palmitic acid (C16:0, min. 95.0%), stearic acid (C18:0, min. 99.0%), oleic acid (C18:1, min. 60.0%), linoleic acid (C18:2, min. 88.0%), linolenic acid (C18:3, min. 60.0%), glycerol and lecithin were purchased from Wako Pure Chemical Industries, Ltd. (Osaka, Japan). Corn oil an…
In this paper, we study a coupled dynamic system describing nematic liquidcrystal flows. The system was motivated by the Ericksen-Leslieequations modeling the flow of nematic liquid crystals. The purpose ofstudying the simplified system is to understand the flow properties ofmore complicated materials,the material con…
A combined in situ Mo K-edge extended X-ray absorption fine structure (EXAFS) and X-ray powder diffraction study has been carried out to follow the evolution of structure in the thermal decomposition of the ammonium thiomolybdates, (NH4)2Mo3S13·2H2O and (NH4)2Mo2S12·2H2O, under nitrogen. Additional information on the…
Pure sodium tetrasulfide (Na2S4) was prepared and reacted with the divalent cations of Mn, Fe, Co, Ni, Cu and Zn in aqueous solution at 25 °C and at concentrations below 10 micromolar of S42–. A series of S42– complexes of these metals were found to exist by voltammetric methods. At higher concentrations, S42– reacted…
A novel inorganic–organic hybrid material incorporating graphite powder and Keggin-type α-germanomolybdic acid (GeMo12) in methyltrimethoxysilane-based gels has been produced by the sol–gel technique and used to fabricate a chemically bulk-modified electrode. GeMo12 acts as a catalyst, graphite powder ensures conducti…
A series of multicomponent Zr 0.5 Ti 0.5 Mn 0.4 V 0.6 Ni 0.85 M 0.15 (M = Fe, Co, Cu, Mo, and Al) alloys are prepared and their crystal structure and pressure-composition-temperature curves are examined. The electrochemical properties of these alloys such as discharge capacity, cycling performance, and rate capability…
Crystals of Na2CoPO4F have been isolated and their structure determined by single crystal X-ray diffraction techniques. Na2CoPO4F crystallizes in the orthorhombic space group Pbcn (no. 60) with a = 5.2475(9), b = 13.795(2), c = 11.689(2) Å, and Z = 8. Its layered structure consists of a framework formed by [CoPO4F]∞ l…
Surface plasmon resonance (SPR) spectroscopy is used to follow the swelling and shrinking processes of a polyaniline redox-active polymer; SPR provides a reading signal for the electrochemical stimuli that activate the polymer.
Polyaluminium coagulants are finding increasing use in potable water treatment plants throughout Australia, with polyaluminium chloride (PACl) in particular now having wide application. This paper reviews the properties and advantages of using these chemicals with particular reference to experience at Daylesford, the…
The first synthesis of two porphyrin-phthalocyanine heterodimers with a direct triple bond linkage between the macrocycles, designed for the study of photo-induced energy and electron transfer processes, is presented along with preliminary ground state and fluorescence spectroscopic data.
The role of surface energy anisotropy during grain growth is investigated using both physical experiments on octachloropropane and numerical experiments using the Elle microstructural modelling system. In particular the effects of anisotropy on growth rates, grain shapes and lattice preferred orientations are analysed…
Abstract This work proposes a control configuration and a nonlinear multivariable model‐based feedback controller for the reduction of thermal gradients inside the crystal in the Czochralski crystal growth process after the crystal radius has reached its final value. Initially, a mathematical model which describes the…
Polyimides having pendant carboxyl groups were prepared by a direct one-pot polycondensation of 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) with 3,5-diaminobenzoic acid (DABz) and bis[4-(3-aminophenoxy)phenyl]sulfone (m-BAPS) in the presence of a γ-valerolactone/pyridine catalyst system using N-methyl-2…
Abstract A detailed X-ray line broadening study in a ball-milled Ti sample is presented. It has been observed that ball milling leads to the formation of nanocrystalline grains and transforms partially to a fcc Ti phase after milling for 10 h. Milled samples show an inhomogeneous strain which increases with increasing…
We have studied the particle removal efficiency of HF-based cleaning mixtures used to clean wafer surfaces during semiconductor manufacturing. and metallic oxide particles can be easily removed from silicon wafers using a HF-based clean, whereas the removal of metallic particles and especially Si and polymeric particl…