Materials Literature
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The dielectric constant of KTaO 3 has been measured as a function of the applied uniaxial stress normal to the (100), (110) and (111) faces. Under the stress normal to (100) or (110), the induced ferroelectric phase transition has been observed at liquid-helium temperatures. From the analysis of the stress dependence…
Optical spectra of Mo${\mathrm{S}}_{2}$ in the excitonic region were obtained by photoconductivity, photovoltaic effect and wavelength-modulated reflectivity at temperatures of 300 to 4.2 K and in magnetic fields of up to 70 kG. Cleaved natural crystals and synthetic crystals studied in both the Faraday and Voigt conf…
Results of an extensive investigation of the optical properties of CaW${\mathrm{O}}_{4}$: ${\mathrm{Sm}}^{3+}$ are reported. Absorption, fluorescence, and excitation spectra and pulsed fluorescence measurements were obtained at temperatures from below 8 K to room temperature on an undoped single crystal and crystals c…
X-ray photoemission experiments were performed on samples of magnesium and aluminum prepared with clean surfaces in ultrahigh vacuum. Core-level binding energies were in excellent agreement with x-ray emission data. Asymmetries in core-level peaks were observed and are compared with theory. The Mg $\mathrm{KLL}$ Auger…
We have determined the frequency dependence of the nonlinear optical susceptibilities of fused quartz and four other glasses, and determined the relative contributions of "electronic" and "nuclear" mechanisms to their nonlinear optical indices. This is the first such determination in solids. Our method has been to ana…
Core-line asymmetries have been observed in the x-ray-photoemission spectra of a number of metals. They are ascribed to the interaction of the suddenly created potential of the photohole with the conduction electrons. A comparison of the experimental line shapes with those predicted by a theoretical calculation gives…
Optical rotatory power, birefringence and thermal expansion were measured near the structural phase transition point of CsCuCl 3 . All these quantities show discontinuous changes at the transition point. Enantiomorphic domains were observed in the low-temperature phase and irreversible temperature dependence of the op…
Room-temperature electrical resistivity and Hall effect measurements as a function of pressure are reported on p-type MoS 2 and on n-type MoS 2 , MoSe 2 and MoTe 2 . In each case, the resistivity decreases under pressure, due to an increase in the carrier concentration. The Hall mobility is relatively pressure-indepen…
PVC is a very versatile thermoplastic. Unfortunately, its potentialities often cannot be realized in practice because of the difficulties encountered in processing. For instance, successful extrusion is possible only in a limited range of conditions and with the use of processing aids. If processing temperatures and s…
To clarify the internal corrosion mechanism in food cans, the effect of trimethylamine oxide (TMAO) on the liberation of tin from tinplate was examined. In the range of pH 2.8-8.0, tin liberation by TMAO was maximum around pH 4, at which there was also marked decomposition of TMAO. Around that pH, the amount of tin li…
Environmental Condition : Air Temperature (23.5±0.5℃) and Relative Humidity (50±10%) were kept constant in a circulation type wind tunnel. Surface temperatures of inside wall, ceiling and floor were kept almost equal to air temperature. Air velocity was the only variable with <10cm/s, 30cm/s, and 50cm/s. Subjects were…
During irradiation, some of the mobile point defects induced by irradiation migrate to and pin down dislocations. Whereas a behavior of these pinning points on dislocations is subject to controversy at present,1, 2 the number of these pinning points is considered to increase, at least, during irradiation. Normally, si…
The phenomena induced in austenitic stainless steels by cathodic charge of hydrogen were phase transformation, hydride and numerous surface cracks formation as previously reported. In this study, the hydrogen induced phases were compared with those of quench or stress induced, and the hydrides were compared with those…
59 Co N.m.r. spectra of 24 µ-carboxylato-di-µ-hydroxo-bis[triamminecobalt(III)] complexes have been examined. Chemical-shift values are constant for all the complexes. However, the linewidths differ significantly. It is shown that the 59Co relaxation is a function of the basicity of the oxygen atoms of the symmetrical…
Computer simulation of back reflection Laue patterns now provides the means to plot Laue patterns for any crystal system in any orientation. This capability makes it possible to determine, rapidly and accurately, the orientation of single crystals and large grains in polycrystalline materials even in cases where littl…
With the aim of obtaining a siliconized layer without any porosity, a silico-carburizing method using a hot bath consisting of Si, carbonate (K2CO3, Na2CO3, Li2CO3, SrCO3 or BaCO3) and neutral salts (KCl, NaCl) has been studied. The results obtained are summarized as follows.(1) In a hot bath consisting of neutral sal…
The current efficiency of the lens system for an accelerating lens composed of three anodes combined with an auxiliary magnetic lens in a field emission scanning electron microscope is described. In this system the spot size for the needed primary beam current can satisfactorily be minimized since the working distance…
Anodic polarization behaviours of SUS 304 and SUS 316 stainless steel open surface and those of crevice-containing specimen were studied in 0.5M NaCl, NaBr, and NaI solution at 25°C. The results obtained were summarized as follows. The crevice corrosion potentials or the pitting potentials of the crevice-containing sp…
No method has so far been established for evaluating the yarn knittability before knitting. Thus, any yarn defective in knittability cannot be found out until it is actually knitted. As an aid to solve this problem, we investigated various methods for evaluating the yarn knittability and obtained the following conclus…
The program package described in the paper performs the transformation of the stiffness, piezoelectric and permittivity (or conductivity) matrices of an anisotropic material under a rotation of the co-ordinate system.