Zobrazeno 1 - 10
of 114
pro vyhledávání: '"Rikuo Ota"'
Autor:
Rikuo Ota
Publikováno v:
Journal of the Society of Materials Science, Japan. 66:542-543
Publikováno v:
Optical Materials. 27:1438-1444
Energy transfer process in soda-lime glasses co-doped with Gd3+ and Eu3+, where a ground state of Gd3+, 8S7/2, was selectively excited to a 6IJ state by a 275-nm pulsed laser irradiation, was studied based on a time-resolved luminescence spectroscopy
Publikováno v:
Journal of the Japan Society of Powder and Powder Metallurgy. 52:786-789
Second-harmonic generation (SHG) has been observed in optically poled TeO2-WO3 glasses doped with vanadium. The second-harmonic (SH) intensity depends on the concentration of vanadium; the glass doped with 0.1 mol% of V2O5 manifests the maximum SH in
Publikováno v:
Journal of the Society of Materials Science, Japan. 54:585-589
Huge amount of ash is generated from industrial wastes. In order to recycle this, the production of glass powder from ash is very useful because the use of glass powder as filler for concrete improves its properties. The purpose of this study is to c
Publikováno v:
Journal of the Society of Materials Science, Japan. 53:623-626
Publikováno v:
Journal of the Society of Materials Science, Japan. 53:53-57
Powders in the ZrO2-MxOy and [20CeO2-80ZrO2 (mol%)]-MxOy system were prepared from zirconium sulfated slurry. The components MxOy are 1-16 groups of metal oxides in the Periodic Table including transition and rare earth. The influence of MxOy additio
Publikováno v:
Journal of Materials Science. 38:2537-2540
Crystallization peak temperature was measured for Li2O · 2SiO2 glass with various number densities of nuclei induced by long heat-treatment (∼405 h) at 460°C. Its crystallization process of Li2O · 2SiO2 glass was simulated numerically in order t
Publikováno v:
Journal of Sol-Gel Science and Technology. 26:859-863
Influence of CeO2 content on the specific surface area (SA), oxygen storage capacity (OSC) and crystalline structure of the powders in the CeO2-ZrO2 system were investigated. The change of SA value by heat-treatment is almost proportional to that of
Publikováno v:
Journal of the Society of Materials Science, Japan. 52:596-599
Isothermal DTA was performed at various temperatures for nucleated Li2O·2SiO2 glasses and the time neccesary to obtain crystallization peak, t0, was measured. The number density of nuclei in the glass was evaluated from crystallization peak temperat
Autor:
Koji Fujita, Iwao Sakaihara, Kazuyuki Hirao, Tsuguo Ishihara, Takashi Wakasugi, Rikuo Ota, Katsuhisa Tanaka
Publikováno v:
Japanese Journal of Applied Physics. 41:1419-1423
Triboluminescence spectra have been measured for polycrystalline Sr1-xBaxAl2O4 (0x1) doped with Eu3+ and Eu2+. The polycrystalline samples of Sr1-xBaxAl2O4:Eu3+,Eu2+ with x=0-0.4 clearly exhibit triboluminescence, while the triboluminescence is hardl