Materials Literature
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Effects of the preparation condition on magnetic properties were investigated in isotropic TbCu7-type Sm-Zr-Fe-Co-N materials made by the melt-spinning process. All the Sm-Zr-Fe-Co powders melt-spun with wheel speeds of 30-40 m/s showed a single-phase structure with crystalline TbCu7. The grain size of the powder decr…
Equal channel angular pressing (ECAP) is a viable forming procedure to extrude material by use of specially designed channel dies without a substantial change in geometry and to make an ultrafine grained material by imposing severe plastic deformation. Because the evolution of microstructures and the mechanical proper…
The tri-tungsten-vacant polyoxometalate, [alpha-AsW15(OH)4O52]13-, derived from the semi-vacant Wells-Dawson complex [alpha-AsW18(OH)4O58]7-, reacts with the late-transition metal cations, Cu(II) or Zn(II), to form sandwich-type species; the X-ray crystal structure of [alphabetabetaalpha]-(Cu(II)OH2)2(Cu(II))2(AsW15(O…
Significantly high benzyl acetate selectivity of 85% at a toluene conversion of ca. 93% was achieved for the first time in a single step by gas phase acetoxylation over highly active and selective Pd-Sb-TiO2 catalysts.
The nonuniformity of electrical characteristics of grain boundaries in ZnO varistors was systematically analyzed. The high nonuniformity exists in barrier voltages and nonlinearity coefficients in different grain boundaries. The barrier voltages have normal distributions, only a few grain boundaries were electrically…
New biodegradable polyurethanes containing azo-linked polymeric prodrugs of 5-aminosalicylic acid (5-ASA) in the main chain were prepared by reacting 1,6-Hexamethylenediisocyanate (HDI) with 3,30-azobis(6-hydroxy benzoic acid) (ABHB) and 5-[4-(hydroxyl phenyl) azo] salicylic acid (HPAS) as azo derivatives of 5-ASA. Th…
Fumed silica-filled PDMS, where quite a strong interaction exists between the filler and matrix via hydrogen bonding, was recycled by means of an extruder with high power ultrasound attachment. It was found that the reinforcing filler plays an important role in the devulcanization process. Compared to the precipitated…
Abstract The synthesis, structure, and properties of the dimetallic complexes [CuLCr(CN) 6 ] 6 ·[{CuL(H 2 O)} 6 Cr(CN) 6 ](ClO 4 ) 3 · 16H 2 O ( 1 ), [CuLCr(CN) 5 (NO)] 6 ·[{CuL(H 2 O)} 6 Cr(CN) 5 (NO)](ClO 4 ) 3 ·16H 2 O ( 2 ) and [CuL] 3 [W(CN) 8 ] 2 ·4H 2 O ( 3 ) {L = 3,7‐bis(2‐aminoethyl)‐1,3,5,7‐tetraazabicyclo[3…
Semi-processed, non-oriented electrical steels used in motor and transformer cores have their magnetic properties optimized by means of a heat treatment performed under a moistened nitrogen atmosphere containing small amounts of hydrogen. The oxidation of carbon on the steel surface by the oxidizing gases present in t…
The small addition of FeO 1.5 [ e.g. , 0.5 atom % (atom percent)] reduced sintering temperature (by ∼200°C), promoted the densification rate and grain growth, for the ceria-based powders. The measurements of lattice parameter indicated that the FeO 1.5 addition could also enhance the dissolution of Gd 2 O 3 in CeO 2 a…
In this work, we report a new and simple, but very useful, electron beam (EB) method for preventing the misting of inorganic materials. A law is suggested to predict the time required to achieve clear vision on misted transparent inorganic materials irradiated by an electron beam. Since the time to clear vision before…
Poly (tetrafluoroethylene) (PTFE) is a material that causes only a few rejections in a living body but has low tissue affinity. A soft tissue implant material that not only has high biocompatibility but also excellent bondability has been developed by photo-chemically incorporating OH functional groups on the PTFE sur…
A series of mandelic acid derivatives was oxidised by molecular oxygen using cobalt(II) chloride as the catalyst. Benzaldehyde and/or benzoic acid derivatives were obtained in high selectivities, depending on the aromatic ring substitution. Different oxidation mechanisms are operating, depending on the mandelic acid s…
Transient deformation of high burnup boiling water reactor (BWR) fuel rods was measured and failure limit was examined under simulated reactivity-initiated accident (RIA) conditions. Brittle cladding failure occurred at a small hoop strain of about 0.4% during an early phase of the pulse irradiation tests at the Nucle…
Mechanical behavior of bulk semicrystalline poly(ethylene terephthalate) (PET) processed through simple shear is investigated. The equal channel angular extrusion (ECAE) process was used to achieve the simple shear condition. The PET samples were processed in one and two ECAE passes in the same direction, with the sam…
Supermicroporous Sn–Si molecular sieves, with different amounts of tin, have been prepared using polyethylene oxide type surfactants as structure directing agents and a silicon alkoxide as precursor. Syntheses have been carried out in acidic media. The structural and chemical properties of the prepared materials, have…
Mechanical behavior and structure of glass under pressure and stress were investigated to seek a guiding principle for obtaining a less brittle glass. A new simple method for measurement of brittleness was proposed by using the concept of brittleness defined from deformation and fracture behaviors. Using this method,…
A series of sulfated alumina catalysts were synthesised by wet impregnation with sulfate-containing solutions. The degree of surface sulfation and corresponding surface acidity could be readily tuned by varying the molarity of impregnating solution. Strong acid treatments (>0.1 M) induced aluminium-sulfate crystallisa…
High voltage insulation defects cause partial discharges (PD) which can be detected through the reception of radiated radio frequency (rf) impulses. The paper describes a method of detecting insulation defects on overhead lines using vehicle mounted rf measuring equipment. The equipment is based on a 4 antenna array t…
A catalyst design methodology, utilizing combinatorial synthesis in parallel with chemometric analysis, is presented, which considers the 3D steric and electrostatic properties of substituents about a constant core structure.