Materials Literature
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The new oxide K0.75Ba0.25Fe1.25Ge0.75O4 has been prepared at 1000 °C in air. This germanoferrite exhibits the real tridymite type structure—hexagonal cell, a = 5.38 Å, c = 8.92 Å—which is fully stuffed by K+ and Ba2+ cations. A combined X-ray and neutron powder diffraction Rietveld analysis gives evidence for a large…
Cu-0.78 mass%Si bicrystals are internally oxidized at various conditions and morphological evolution of amorphous SiO2 formed on a grain boundary (GB) is observed. After the reaction of Si atoms with oxygen, a film-like SiO2 phase with holes is initially formed on GB of Cu. At temperatures used for the internal oxidat…
Copper agglomeration in Cu(100 nm)/Ta(50 nm)/Si structure deposited by ion beam deposition was examined. Copper thin films were annealed at 650°C for 1 to 60 min in hydrogen atmosphere. The surface morphology, crystalline microstructure and electrical resistivity were investigated by field-emission scanning electron m…
マグネサイトを低温で酸化マグネシウムに改質することを目的として, マグネサイトに硝酸マグネシウム6水和物を添加して加熱改質試験を行った. その結果, マグネサイトの改質速度は単独加熱の場合よりも大きくなり, 最大170K低温でマグネサイト改質を行うことができた. これは, 硝酸マグネシウム6水和物の分解によって生じる窒素酸化物の効果であり, マグネサイトをより低温で脱硫剤に改質できる可能性が示された.
The crystal (NH4)2CuCl4·2H2O and some related compounds have been subjected to the thermal (DSC), dielectric (in the frequency range 300 H2÷ 1 MH2) and ultrasound wave propagation studies, in the temperature range from 5 K to the dehydration temperature.
This paper reports a study of static and dynamic mechanical properties of electron beam (EB) cured polymer dispersed liquid crystals. These systems consist of micron-sized droplets dispersed in a solid polymer matrix. They are prepared according to the polymerization induced phase separation process initiated by expos…
Transparent ferromagnetic semiconductor Fe-Zn-O heterogranular films composed of wurtzite ZnO matrix and magnetite particles have been prepared by chemical deposition of film in aqueous solutions followed by heating at 773 K under vacuum. The Fe-Zn-O heterogranular films revealed ferromagnetic behaviors with Curie tem…
A ceramic material can be elongated extensively in tension above approximately half the absolute melting point provided it has a fine (<1 μm diameter) equiaxed grain size that is stable during deformation. The discovery of superplasticity in ZrO2-based ceramics triggered numerous research activities on ceramics superp…
The effect of direct exposure to UV-radiation on the migration of vinyl chloride monomer (VCM) from unplasticized polyvinyl chloride (uPVC) pipes was investigated using locally manufactured pipes. Specimens 33-cm long were used throughout the research. The investigation was carried out, at different times of exposure…
Melt‐compounded composites of synthetic styrene‐co‐butadiene rubber (BUNA SL18) and silica particles (Silica VN3, Degussa) were characterized by wide‐angle and small‐angle x‐ray diffraction and stretching calorimetry. At low elongations, silica particles provided a considerably weaker reinforcement effect of the rubbe…
A fibrin-free intraocular lens (IOL) has been developed for hindering secondary cataract. Hydrophilic and hydrophobic micro-domains were alternately generated on the poly(methyl methacrylate) [PMMA] IOL surface with UV photon irradiation. The modified IOL was soaked in aqueous fibrin solution, and the fibrin adsorptio…
The effect of small amount of CoO addition on alkali oxide containing borosilicate glass ceramics has been discussed in order to see the influence on the crystalline phase constitution, microstructure and dielectric behavior. The glasses were crystallized in the temperature range 725–950°C. The lower crystallization t…
Tensile properties of die cast magnesium AM60 were investigated by testing tensile bar specimens obtained from three sources. The first series of tensile bars were cut from eight locations from multiple copies of a die cast magnesium AM60 automotive instrument panel beam. The second series were cut from six-inch squar…
Cocrystals were prepared from 2-amino-5-nitropyridine (2A5NP) and achiral benzenesulfonic acids (Ar–SO3H), which were designed for second-order nonlinear optical materials. Both components are commonly crystallized in 1:1 ionic forms of 2A5NPH+ · Ar–SO3 −. The cocrystal of 2A5NP with 2-nitrobenzenesulfonic acid belong…
The p-type Ag0.208Sb0.275Te0.517 boule was unidirectionally grown using a Bridgman furnace and, it was subsequently cooled rapidly by an Ar flush to form a high temperature phase AgSbTe2, which could be desirable for power generation. Though the boule looked a homogeneous Widmannstätten structure of the AgSbTe2 phase,…
Based on a new concept using only "Concentrated Gaussian Curvature by angle ( =2pai )" for clothing Abstract Kc theta - design, we classified similar curved surface shapes of tight-fitting b patterns (called T-pattern) regardless of odice size. In accordance with the conservation law based on the Gauss-Bonnet theorem,…
Recent studies of electro-optical properties of Ultraviolet (UV) and Electron Beam (EB) cured Polymer Dispersed Liquid Crystals (PDLCs) show substantial advantages of EB systems. Threshold and saturation voltages are lower while the contrast ratio is higher for EB systems compared to UV counterparts. The present paper…
A new surface modification technique for PET films is proposed. This technique, called VPI modification technique, is a combination of two processes: The first step involves the deposition of vinylphthalimide (VPI) on the PET film surfaces, followed by Ar plasma irradiation of the VPI-covered film surfaces. The VPI mo…
Shock‐wave experiments with four glasses of different hardness, two ceramics, quartz and silicon single crystals have been carried out. Experiments with piles of thin sample plates confirm the appearance of the failure wave in elastically compressed fused quartz, K8 crown glass, and heavy flint glass, although the rel…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Hideki Aoyagi, Togo Kudo, Hajime Tanida, Hideo Kitamura; New configuration of photoconductive‐typ…