Fabrication of transparent silica glass by powder sintering

O. Yong-Taeg, Shigeru Fujino, Kenji Morinaga

    研究成果: ジャーナルへの寄稿学術誌査読

    68 被引用数 (Scopus)


    Transparent silica glasses were obtained by sintering a green compact (fabricated by slip-casting methods for high-purity silica glass powder) in diverse atmospheres. The relationships between sintering atmosphere and sintering temperature that result in transparent, sintered silica glass were shown. The results indicate that there are four forming phases for each sintering atmosphere and temperature: (1) nontransparent glass resulting from an overabundance of pores (2) crystal, such as cristobalite or β-quartz, (3) moganite, and (4) transparent glass. Optimum sintering temperature for fabricating transparent silica glass was above 1673 K in a high-vacuum (10-4Pa: p(O2) = 10-14) atmosphere. We investigate the fabrication of transparent and hydroxyl-free silica glass by a powder-sintered method. After studying the effect of sintering schedule on residual [OH-] concentration for transparent, sintered silica glasses, we sintered a green compact prepared by silica powders with a mean particle size of 1.6 μm, first heating it to 1523 K for dehydration and then to 1873 K for densification. This typical fabricated condition resulted in a transparent, sintered silica glass with < 1 ppm [OH-] concentration.

    ジャーナルScience and Technology of Advanced Materials
    出版ステータス出版済み - 12月 2002

    !!!All Science Journal Classification (ASJC) codes

    • 材料科学一般


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