Materials Literature
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We present a review of our theoretical and experimental investigations of the domain engineering aspects of domain structure development. Particular attention is paid to the processes governing the fabrication of periodic domain patterns.
By combining the thermodynamic classification of Primary, Secondary and Tertiary Ferroics and the corresponding symmetry-allowed or symmetry-forbidden driving forces for domain switching and reorientation, with a classification of Aizu's 773 species (prototype/ferroic phase point group pairs) into 30 ensembles of prop…
A double hexapole corrector system was constructed for compensation of the spherical aberration of the objective lens of a transmission electron microscope. By implementing this system on a commercial 200 kV instrument with a field emission gun, the spherical aberration correction was demonstrated and an improvement o…
We report measurements of the magnetic and electrical properties of sintered manganites of the form . We find that the peak in the conductivity moves rapidly to lower temperatures as the chromium content is increased and is completely absent for x > 0.2. The Curie temperature, as determined by magnetization measuremen…
Based on an example of the dissolution process of calcium apatites, a new chemical approach to elaboration of basic dissolution mechanisms of inorganic solids in liquids at the atomic (ionic) level has been proposed and discussed The approach is based on experimental results on the surface state analysis, passed throu…
The thermal behaviour of synthetic hydrotalcites, Mg6Al2(OH)16CO3·nH2O and Mg4Zn2Al2(OH)16CO3·nH2O, was studied by thermogravimetric analysis and infrared emission spectroscopy. The Mg/Al-hydrotalcite shows a loss of 7.0% m/m physically adsorbed water up to 70°C. Between 70 and 230°C 16.5% m/m is lost due to decarboni…
Nanoparticles of InS and InSe capped with TOPO (tri-n-octylphosphine oxide) or nanoparticles of InSe capped with 4-ethylpyridine, which are close to mono-dispersed, have been prepared by a single-source route using tris(diethyldithiocarbamato)indium(III) or tris(diethyldiselenocarbamato)indium(III), respectively. The…
Highly mono-dispersed CdSe–CdS core–shell nanoparticles have been prepared by a novel method in which [Cd{Se2CNMe(nHex)}2] (250 °C for 30 min) and [Cd{S2CNMe(nHex)}2] (250 °C for a further 30 min) are thermolysed in tri-n-octylphosphine oxide (TOPO) in a ‘one pot’ synthesis; the core–shell structure has been character…
The phase behaviour of hard spherocylinders is calculated using the classical density functional theory of freezing. In particular, we construct a modified weighted-density approximation and calculate the bulk phase diagram. While the stability regime of the isotropic, nematic and smectic-A phases is in reasonable agr…
Electron spectroscopy for chemical analysis or ESCA is a powerful tool for the characterisation of chemical species at surfaces. ESCA can therefore play a major role in the study of heterogeneous catalysts and catalytic processes. In the polymer field, more recently an increase in sensitivity combined with high spectr…
Sixteen glycosides of polyoxypregnanes, including two new pregnanes, isokidjoladinin and isotemontosin, were isolated form the leaves and caules of Marsdenia tomentosa collected in Fukuoka. The structures of fourteen new glycosides were elucidated and named marstomentosides A-N.
The conduction band offset of the type II heterostructure CdS/ZnSe is determined from photoluminescence data of single quantum wells. The cubic quantum well samples have been grown by compound-source molecular-beam epitaxy. Photoluminescence spectra were measured at low temperatures and evaluated by fitting an effecti…
A new quantitative corrosion testing procedure for copper and copper alloy corrosion inhibitors was developed, with the aim of calculating corrosion protection in percent for each inhibitor on trial. 2-aminopyrimidine, 2-amino-5-mercapto-1,3,4-thiadiazole, benzotriazole, 5,6-dimethylbenzimidazole, 2-mercaptobenzimidaz…
MnBi bulk samples with the low temperature phase are successfully prepared by arc-melting under a He atmosphere. Samples with the high temperature phase are firstly prepared by rapidly quenching a molten solution of Mn and Bi which is arc-melted at an atmospheric pressure of He gas. Subsequently, zone-melting is perfo…
Pressure induced B4 (wurtzite) -B1(rocksalt) transition of ZnO was investigated by energy dispersive X-ray diffraction method up to 12GPa and 1000°C. The phase boundary between the B4 and B1 phases can be described by a straight line with P/GPa=6.1-0.0012*T/°C. Under non-hydrostatic condition, the phase transition at…
Layered double hydroxides (LDH) with the hydrotalcite-like structure, but containing Ni(II) and V(III) cations in the layers, have been prepared by the constant pH method. Characterization by elemental chemical analysis, powder X-ray diffraction, differential thermal analysis, thermogravimetric analysis, FT-IR spectro…
Non-ionically templated [Si]-MSU-1 mesoporous silicas have been prepared in weakly ionic sodium salt solutions from a non-ionic silica precursor and exhibit highly symmetric bimodal mesopore systems and demonstrate the immense flexibility of the non-ionic templating system.
The failure of oxide scales formed on mild steel (mass contents of 0.17% C, 0.13% Si, 0.72% Mn) was investigated using a high‐temperature tensile test technique over the temperature range 830 – 1150°C. Strain and strain rates used were 1.5 – 20% and 0.02 – 4.0 s −1 , respectively. The scales were 10 – 300 μm thick. Th…
The problem of premature failure of rotating machines fed by inverters appears to be of crucial importance. Understanding of the phenomena caused by this new type of supply on the stator insulation of motors provides enhanced reliability of the inverter/motor set. After identifying the stresses created by this type of…
Vanadium oxide films were prepared by dip‐coating from V‐oxoisoproxide sols and heating at 300°C for 1 h. Transmission electron microscopy combined with electron and X‐ray diffraction revealed that the films consist of disordered grains with an orthorombic structure . Electromotor force (emf), cyclic voltammetric (CV)…