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Densified low-hygroscopic form of P$$_{2}$$O$$_{5}$$ glass

P$$_{2}$$O$$_{5}$$ガラスの高密度化低吸湿形態

Brazhkin, V. V.*; Akola, J.*; 片山 芳則; 小原 真司*; Kondrin, M. V.*; Lyapin, A. G.*; Lyapin, S. G.*; Tricot, G.*; Yagafarov, O.

Brazhkin, V. V.*; Akola, J.*; Katayama, Yoshinori; Kohara, Shinji*; Kondrin, M. V.*; Lyapin, A. G.*; Lyapin, S. G.*; Tricot, G.*; Yagafarov, O.

P$$_{2}$$O$$_{5}$$は高い吸湿性を持つ典型的なガラス形成酸化物である。われわれは超高圧下でP$$_{2}$$O$$_{5}$$融体を急冷することで、通常よりも12%も高い密度を持つガラスを作ることに成功した。このガラスは吸湿性が少なく、数週間空気中で安定である。この新しい形態のガラスの構造解析によって、ガラス中のナノ空孔の体積が減少していることが明らかになった。

P$$_{2}$$O$$_{5}$$ compound is an archetypical glass-forming oxide with a high hygroscopicity. We found that the quenching from the P$$_{2}$$O$$_{5}$$melt under ultrahigh pressures enables obtaining densified P$$_{2}$$O$$_{5}$$ glasses with a residual densification up to 12% at normal conditions. These glasses have a low hygroscopicity and can exist under air conditions for several weeks. An examination of the structure of the new form of P$$_{2}$$O$$_{5}$$ glass reveals a cardinal decrease of the volume of nanovoids in the glassy matrix.

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パーセンタイル:44.78

分野:Chemistry, Physical

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