Browsing by Author "Soga, Naohiro"

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    Glass science and glass industry in Japan
    (Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1992) Soga, Naohiro
    In this paper, the history of the Japanese glass industry from the introduction of European glassware in the 16th century is presented first, and the current state of the glass industry, such as the change in number of workers and sales of glass products in recent years, is described next. Then, the research and development areas of industrial interest and the research topics in academic institutions are summarized.
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    Microstructure and magnetic character of terbium borate glass
    (Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1992) Tanaka, Katsuhisa; Ohyagi, Tomohito; Hirao, Kazuyuki; Soga, Naohiro; Mori, Hirotaro
    Microstructure and magnetic character of 30 Tb2O3 · 70 B2O3 glass have been examined by means of high-resolution transmission electron microscopy and magnetization measurements. Although no trace of crystahine phases was observed in the electron diffraction pattern, the transmission electron micrograph revealed that there exist clusters, the size of which is about 1 nm, in the present glass. The magnetization measurements showed that this glass is paramagnetic at room temperature. However, the magnetization is high enough for the glass to adhere to a permanent magnet in the Nd-Fe-B system at room temperature.