Crystallization behavior of new transparent glass-ceramics based on barium borate glasses
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概要
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This paper describes the preparation of several new transparent and very fine crystal glass-ceramics from the BaO-B_2O_3 system utilizing an appropriate additive of fluorides, partial replacement of B_2O_3 by Sid_2 and introducing nucleating agents, such as TiO_2. The physical properties of the prepared materials and the changes with varying base glass compositions and heat treatment programs were investigated. The thermal behavior and microstructure of the developed phases were characterized using DTA, XRD, and SEM. Glass-ceramics with marked transparency were prepared. These transparent derivatives owe their transparency to the distinctive properties of the nano-crystalline samples. The dielectric constant of transparent glass-ceramics samples at 100 kHz were between 14-20, which is very suitable for a wide range of applications, such as the high-speed switching of large-scale integrators. It was found that the addition of F^- and SiO_2 greatly influenced the transparency of the produced glass-ceramics. Also, the addition of TiO_2 greatly enhanced transparency, in spite of increasing cutoff in the UV region to a higher wavelength.
- 社団法人日本セラミックス協会の論文
- 2008-05-01
著者
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KOJIMA Toshinori
Department of Materials and Life Science, Seikei Univ.
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Abdel-hameed Abdel-hameed
Glass Research Department National Research Center
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Abdel-hameed Salwa
Glass Research Department National Research Center
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MARGHA Fatma
Glass Research Department, National Research Center
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GHONIM Nagwa
Glass Research Department, National Research Center
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SATOKAWA Shigeo
Department of Materials and Life Science, Faculty of Science and Technology, Seikei University
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Margha Fatma
Glass Research Department National Research Center:department Of Materials And Life Science Faculty
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Ghonim Nagwa
Glass Research Department National Research Center
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Satokawa Shigeo
Department Of Materials And Life Science Faculty Of Science And Technology Seikei University
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Kojima Toshinori
Department Of Materials And Life Science Faculty Of Science And Technology Seikei University
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Kojima Toshinori
Department Of Information And Computer Science Keio University
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Kojima Toshinori
Department Of Applied Chemistry Faculty Of Engineering Seikei University
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