Materials Literature
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(LNF) is one of the promising cathode materials for intermediate-temperature solid oxide fuel cells (SOFCs). However, LNF is more reactive with -based electrolyte than conventional in the sintering temperature region. In this paper, we examine the relationships among LNF sintering characteristics, reactivity, and cell…
A heterometallic complex, Na(2)[Co(II)(2)Co(III)(2)(IDC(3-))(4)(bipy)(4)].12H(2)O (bipy = 2,2'-bipyridine), in which mixed-valence tetranuclear squares with imidazoledicarboxylate (IDC(3-)) linkers are tethered into a unique chain through disodium units, is hydrothermally synthesized and structurally and magnetically…
In this paper we report on the synthesis and oxidation behavior of the layered ternary carbides V 2 AlC and ( Ti 0.5 , V 0.5 ) 2 AlC . The oxidation kinetics were studied thermogravimetically in air in the 500 to 700°C temperature range. The oxidation of V 2 AlC is governed by the inward migration of O, and possibly t…
The composition of Ti-30Nb-10Ta-5Zr, which is simplified that of the Ti-29Nb-13Ta-4.6Zr alloy developed for biomedical applications, was selected, and then Nb content in the basic composition was varied from 20 to 35%. The deformation mechanisms of such Ti-Nb-Ta-Zr system alloys were investigated by loading-unloading…
A novel heterogeneous catalyst, [Zn(2.15)Al(0.86)(OH)(6.02)][Mn](0.19)[C(6)H(5)COO](0.48.2H(2)O, where [[Mn]= chiral sulfonato(-)salen-manganese(iii) complex, Na(2)MnC(20)H(22)N(2)S(2)O(12)Cl, intercalated into Zn(II)-Al(III) layered double hydroxide host], has been synthesized and found to be an effective heterogeneo…
A new analytical methodology, complex capacitance analysis, is developed for porous carbons that are employed as electric double-layer capacitor (EDLC) electrodes. Based on the transmission line model, the imaginary capacitance profiles vs. are theoretically derived for a cylindrical pore and further extended to multi…
The synthesis and structural characterisation of three small nickel(II) cages are reported, all stabilised by pivalate ligands. The magnetic properties of the cages have been studied by a combination of susceptibility measurements and inelastic neutron scattering. For a dinuclear cage, [Ni2(mu-OH2)(O2CCMe3)4(HO2CCMe3)…
A variety of hierarchical oxide nanostructures, including ZnO nanonails on nanowires/nanobelts, ZnO nanorods on nanobelts, comb-like ZnO nanostructures, hierarchical MgO nanowires, etc., have been synthesized by thermal vapor evaporation and condensation. Observation of these nanostructures demonstrates the diversity…
This article reviews the optical properties of fluorinated polyimides (FPIs) that exhibit outstanding optical transparency as well as excellent thermal, mechanical, and electric properties for the applications to optical components, in particular for telecommunication applications. The optical transparency of polyimid…
Alkali treatment was performed on ‘Curaua' fibers to improve their mechanical properties. Curaua fibers were dipped into 5%, 10%, and 15% concentrated sodium hydroxide solutions for 1h and 2h. The effects of solution concentrations and treatment times on the physical and mechanical properties of curaua fibers were eva…
The hydrothermal reaction of thiosalicylic acid, (C(6)H(4)(CO(2)H)(SH)-1,2) with manganese(III) acetate leads to formation of the coordination solid [Mn(5)((C(6)H(4)(CO(2))(S)-1,2)(2))(4)(mu3-OH)2] (1) via a redox reaction, where resulting manganese(II) centres are coordinated by oxygen donor atoms and S-S disulfide b…
This chapter considers thermal spin crossover occurring in transition metal compounds other than those of Fe(II), Fe(III) and Co(II). Unusual magnetic properties of several coordination and organometallic complexes of Mn(II), Mn(III), Cr(II) and Co(III) are discussed in the light of their structural features.
Brief Table of Contents. Graphical Abstracts for the Experiments. 1. INTRODUCTION. 2. IDENTIFICATION AND EVALUATION OF CHEMICAL HAZARDS. 3. CHEMICAL EXPOSURE AND ENVIRONMENTAL CONTAMINATION. 4. SOURCES OF INFORMATION ABOUT CHEMICAL HAZARDS. 5. INTRODUCTION TO GREEN CHEMISTRY. 6. ALTERNATIVE SOLVENTS. 7. ALTERNATIVE RE…
Highly ordered large pore SBA-15 silica functionalized with up to 16% aminopropyl groups, which gave high catalytic activity and selectivity toward flavanone synthesis through aldol condensation and subsequent intramolecular Michael addition of benzaldehyde and 2'-hydroxyacetophenone, was synthesized for the first tim…
The possibility of fabricating a highly regular nanohole array using different acid mixtures for the anodic oxidation of aluminum was investigated. The regularity of a nanohole array formed using a 1:1 sulfuric/oxalic acid mixture was quantified. Excellent regularity was obtained at around an anode voltage of 32 to 36…
This paper deals with the analysis of structural and electronic effects of size in quasi-stoichiometric CeO2 nanoparticles prepared by a microemulsion method. The preparation method yields highly controlled materials in terms of particle size distribution and chemical oxidation state, with the presence of Ce(III) spec…
A class of layered double hydroxides with the layer composition [MAl4(OH)12](NO3)2·xH2O, where M = Zn, Cu, Ni and Co, has been synthesised for the first time and its anion exchange chemistry explored. These materials are related to the minerals chalcoalumite, mbobomkulite and nickelalumite (see M. Fleischer, R. G. Bur…
Polypyrrole (PPy) nanotubes with highly uniform surface and tunable wall thickness were fabricated by one-step vapor deposition polymerization (VDP) using anodic aluminium oxide (AAO) template membranes, and transformed into carbon nanotubes through a carbonization process.
An infiltration method for preparing a boron carbide‐aluminum (B 4 C‐AI) composite was modified so as to reduce the processing temperature and time. Titanium metal and titanium‐based compounds were added to B 4 C powders to enhance the wettability of the liquid aluminum on boron carbide skeletons. As expected, the tim…
We have prepared functional TiO2@CdS core/sheath heterostructure nanowires using a simple chemical reduction method at room temperature. The core/sheath nanowires were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and UV-visible spectroscopic techn…