Materials Literature
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かさ高いエステル基を有する1, 2-ジ置換モノマーであるフマル酸ジイソプロピル (DiPF) と各種ビニルモノマーとのラジカル共重合性の検討を行い, さらにスチレン (St), 酢酸ビニル (VAc), 塩化ビニル (VC) との共重合体においては極限粘度, 熱的性質についても調べた. 共重合は, AIBNを開始剤に用い, 60℃の重合温度で行った. 共重合体は, St, VAc, アクリロニトル, イソブチレン, 1, 3-ブタジエン, VCでは得られたが, メタクリル酸メチルとメタクリル酸では得られなかった. St, VAc, VCとの共重合では, DiPFの組成が約5mol%以内で重合収率に影響はなく, St, VAcでは極…
We discuss, with illustrations drawn from the simple example of a dielectric grating under total internal reflection illumination, the use of electric field, energy density and Poynting vector as tools for understanding phenomena associated with dielectric gratings. The electric field has greatest direct observational…
An optimization procedure for designing a ceramic tensile creep specimen to minimize stress concentration is carried out using a finite element method. The effect of pin loading and the specimen geometry are considered in the stress distribution calculations. A growing contact zone between the pin and the specimen has…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
An X-ray diffraction (XRD) investigation was undertaken to clarify the processes occurring during the oxidation of ferrosilicon and silicon carbide in the presence of lanthanum oxide, with the aim of optimising the technique to give a product that is easy to fuse with lithium tetraborate into a bead suitable for X-ray…
Organic sulfur compounds have played important roles in developing new organic materials. Recently we have reported that thiophene-fused DCNQI (DTQl)1 forms a new family of highly conducting CuI complex.1 However, all our attempts to grow a single crystal suitable for an X-ray analysis have been unsuccessful. The pres…
A study was made of a broad range of size formulations based on four different kinds of polyvinyl alcohols (PVAs), carboxymethyl cellulose (CMC), carboxymethyl starch (CMS), and sodium polyacrylate (PA), as well as binary mixtures of PA with PVAs, CMC or CMS, CMC with PVA or CMS, and CMS with PVA. The effect of size f…
Corrosion behavior of iron in 0.1 kmol·m−3 LiClO4 methanol-water solutions in the range of water contents up to 100% was investigated by the immersion corrosion test, polarization curve and electrode impedance measurement. The effect of water content on the corrosion rate of iron shows a maximum around the water conte…
The effect of σ phase precipitation on the toughness of duplex stainless steel and its weld metal was investigated by means of fractography. The material used was SUS329J1 steel, and the samples were welded using SMAW SUS329J4L (DP3) electrode and SUS329J3L (DP8) electrode. The materials were reheated at 1023K and 112…
The oxidation of silicon boride (SiB4) powder at high temperatures was investigated in order to determine the possibility of its high-temperature utility. SiB4 powder with an average particle size of about 10μm was used in this experiment. The sample oxidized at 200 to 1100°C for 5min to 50h in air; the weight changes…
Improvement in sensitivity performance of uncooled infrared sensor and increase in pixel numbers of the sensor have been accelerated. It is the first time in Japan that the uncooled camera is realized, which employs 256 ×256 uncooled bolometer sensor elements. Vanadium Oxide material is selected for the uncooled bolom…
The effects of the moisture on CLBO have been investigated. CLBO hydrated at high humidity condition, resulting in 5B2O3·Cs2O·8H2O. The surface hydration seems to induce the cracking and the refractive index change in CLBO. The thermal annealing is effective to restore the changed index.
Abstract The growth rate oscillations of {10 1 ) NaNO 3 crystal face have been measured at certain range of supersaturation of a water solution. It has been found, that root‐mean‐square amplitude of the oscillations of rates increases linearly with the growth of the mean growth rate. The supposition has been made that…
Six varieties of tussah and two varieties of mulberry yarn were assessed by using the Seriplane test method for various appearance grades and also on the Uster evenness tester. The correlation coefficients between evenness, cleanness, and neatness as determined by the Seriplane method and the mass irregularity (CV%),…
From around 1990, many new types of fibers and textiles began to be released onto the market by synthetic-fiber companies. Known as shingosen, these synthetic-fiber textiles are characterized by their innovatory texture, touch, and appearance and created a new paradigm and fashion among the textile industries. Shingos…
PbTe single crystals were prepared by the Bridgman method, where either Ag2Te or PbI2 was doped as the source material of silver and iodine. The hole concentration was successfully controlled in the range from 2.0×1024 to 9.0×1024 m−3 by doping 100 to 700 mol ppm Ag2Te, and from 3.5×1023 to 4.5×1024 m−3 by doping 100…
SiO2-Si3N4 composites were prepared by hot pressing process. Their flexural strength and fracture toughness obtained are 143MPa and 1.7MPa.m1/2=, which are 107% and 70% higherthan those of the SiO2 matrix material respectively. The addition of higher elastic modulus Si3N4 particulates and the residual stress caused by…
The directional solidification of highly undercooled single phase alloy is put forward. In contrast with the conventional directional solidification, it occurs under a negative temperature gradient at the solid/liquid interface. The essential condition for this process is that the thermal diffusion in liquid plays a d…
Infrared chopper elements have been fabricated, utilizing the transient light scattering effect of ferroelectric liquid crystal with asymmetric waveform voltage drive. New elements can performed 12% of modulation degrees in around 10 microns region. A combination of an IR-chopper and a pyroelectric sensor is used to m…
Oxidation behavior of high-purity Si-SiC composite (molar ratio 40/60) was studied during reactions at 1600K for 15h in Ar-O2 (PO2: 0.02-97kPa) atmospheres to evaluate the oxidation-resistant property. The oxidation rate was determined by measuring CO and CO2 concentrations during the oxidation using a quadrupole mass…