[en] As detailed in the fact sheet, this new glass fiber-producing process can yield fibers that are more uniform in diameter, break less easily, and be produced more economically

[en] The luminescence of Ba₂CaUO₆, which has the ordered perovskite structure, is reported. Emission and excitation spectra, quantum efficiency, and decay times were measured at 4.2 K. The temperature dependence of the emission spectra and the decay time were investigated. The results show that, in Ba₂CaUO₆ energy transfer plays an important role, even at 4.2 K. After excitation in the intrinsic uranate centers, the energy migrates through the lattice till it is trapped at uranate centers near defects. These traps get emptied with increasing temperature. This results in a decrease of the luminescence intensity and the decay time. Furthermore, some results are given on the luminescence of Ba₂CaUO₆:Eu³⁺

[en] A correlation of the most probable blister diameter D/sub mp/ and mean blister skin thickness t for helium-ion-irradiated annealed polycrystalline and monocrystalline V (100) surfaces yields a relationship D/sub mp/proportionalt/sup 0.89/. This relationship is different from the relationship D/sub mp/proportionalt/sup 1.5/ suggested by other authors for vanadium. The relationship observed in the present studies does not support the lateral stress model for blister formation, which predicts D/sub mp/proportionalt/sup 1.5/. Evidence is presented for blister formation by internal gas pressure, as suggested earlier by the present authors

[en] The heat capacity of a sample of LaF₃ was determined in the temperature range 5--350⁰K by aneroid adiabatic calorimetry and the enthalpy from 298.15 to 1477⁰K by drop calorimetry. The heat capacity at constant pressure C⁰/sub p/(298.15⁰K), the entropy S⁰ (298.15⁰K), the enthalpy [H⁰ (298.15⁰K)-H⁰ (0)] and the Planck function -[G⁰ (298.15⁰K)-H⁰ (0)]/298.15⁰K; were found to be (90.29 +- 0.09) J ⁰K^-1xmole^-1, (106.98 +- 0.11) J ⁰K^-1xmole^-1, (16717 +- 17) J mole^-1, and (50.91 +- 0.05) J ⁰K^-1xmole^-1. The thermal functions from the present research were extended up to the melting temperature (1766⁰K) by combination with previously published results. The anomalously high heat capacity from about 1100 to 1766⁰K is discussed

[en] A compendium of the reports of nine workshops held to ascertain new directions and priorities for energy related basic research in the materials sciences program is presented. Topics covered include: electronic, magnetic, optical and thermal properties; surface science; x-ray, neutron and electron scattering; low temperature research and superconductivity; phase transformations, stability and materials interactions; defects, diffusion and radiation effects; engineering materials science; mechanical properties; and thermodynamics and electrochemistry

[en] The pressure dependent Raman spectra of the simple ionic conductors Ag₂HgI₄ and Cu₂HgI₄ is reported

[en] Broad bibliographical investigation regarding the materials to be used for the construction of nuclear fusion reactors and their evaluation for the design and research are reported. The investigation was conducted by the nuclear fusion reactor material investigating subcommittee of the Japan Society for the Promotion of Science. The report is divided into eight sections, namely 1) introduction, 2) physical properties, 3) chemical properties, 4) mechanical properties, 5) productivity, 6) irradiation effects, 7) environmental effects, and 8) summary. The investigated materials are molybdenum and molybdenum-base alloys, niobium and niobium-base alloys, vanadium and vanadium-base alloys, SUS-316, Incoloy 800, Nimonic PE 16, Hastelloy X, Inconel X-750, etc. In the coexistence of Hastelloy-N with Li, the corrosion rate is very large, therefore the dynamic corrosion test under the satisfactory control of impurities is strongly desired. For the tensile and creep breaking strength at high temperature, the further precise examination is required for statistic treatment. For the evaluation of productivity, it is desirable to examine along the particulars of the concept design of CTR and environmental condition data. For obtaining the data of 14 MeV neutron irradiation, the construction of a strong neutron source or a criticality experimental apparatus may be required. The radiation effects of 14 MeV must be compared with the data of 1 or 2 MeV. The data of stainless steels of 300 series are predominantly rich, so that the stainless steels can be used for at least the research reactor. For environmental effects, the research must be made on the problems, the information and data of which are short. (Iwakiri, K.)

[en] The Raman spectra of molten YCl₃--A Cl (A=Cs, K, Li) mixtures have been measured at different compositions and temperatures up to 890 degreeC. The Raman spectra of polycrystalline Cs₂NaYCl₆ and YCl₃ were also measured from 25 degreeC to temperatures above melting. The factor group analysis of crystalline Cs₂NaYCl₆ was used to identify the three Raman active modes (ν₁, ν₂, ν₅) of the YCl₆^-3 octahedra. For liquid mixtures rich in alkali halide, the predominant features of the spectra are characterized by a polarized and a depolarized band with frequencies near the ν₁ and ν₅ frequencies of the YCl₆^-3 octahedron and thus indicates the existence of such species in the melt. In melts containing above 25% YCl₃ a new polarized band D appears in the spectra which shifts continuously and rapidly to higher energies with increasing YCl₃ concentration. The frequency shift is attributed to a continuous distortion mechanism of the YCl₆^-3 octahedra by the neighboring yttrium ions. The continuous frequency shift of the D band and a comparison of the liquid and solid Raman spectra of yttrium chloride suggest the existence of lattice-type modes in these melts

[en] In this paper a general survey of development of science of sintering during the period of 150 years according to dealectics point of view is presented. It is the importance of electronic theory of sintering as to further development of science of sintering that is especially pointed out

[en] NMR has been used to study the orientational behavior of registered lattices of ortho-H₂ and para-D₂ molecules adsorbed on graphite in the range 1.3--4.2 K. The results show a weak crystal field (0.56 K for o-H₂ and 2.4 K for p-D₂). In addition, p-D₂ molecules experience a temperature-dependent molecular field arising from electrostatic quadrupole-quadrupole interactions. No orientational ordering occurs down to 1.3 K, a factor of 2 below the mean-field transition temperature