Correlation with one- and two-photon absorptions in Bi2O3 containing B2O3 and SiO2 glasses with zero photoelastic constant

Hayashi, Katsuki; Ishibashi, Yukihide; Shimizu, Tomohito; Asahi, Tsuyoshi; Saitoh, Akira

doi:10.7567/1882-0786/ab40f4

Cited by 4 publications

(1 citation statement)

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“…The exact value depends not only on the phase of , but also on the preparation route and the microstructure of the material (e.g. a thin film or polycrystalline ceramics) 29 . The value mostly reported for bulk samples is 2.75–2.8 eV 30 .…”

Section: Discussionmentioning

confidence: 99%

Facile and reproducible method of stabilizing $$\hbox {Bi}_2\hbox {O}_3$$ phases confined in nanocrystallites embedded in amorphous matrix

Pietrzak

Jarocka

Jastrzębski

et al. 2021

Sci Rep

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Bismuth sesquioxide ($$\hbox {Bi}_2\hbox {O}_3$$ Bi 2 O 3 ) draws much attention due to wide variety of phases in which it exists depending on the temperature. Among them, $$\delta$$ δ phase is specially interesting because of its high oxide ion conductivity and prospects of applications as an electrolyte in fuel cells. Unfortunately, it is stable only in a narrow temperature range ca. 730–830 $$^{\circ }$$ ∘ C. Our group has developed a facile and reproducible two-stage method of stabilizing $$\hbox {Bi}_2\hbox {O}_3$$ Bi 2 O 3 crystalline phases confined in nanocrystallites embedded in amorphous matrix. In the first stage, glassy materials were obtained by a routine melt-quenching method: pure $$\hbox {Bi}_2\hbox {O}_3$$ Bi 2 O 3 powders were melted in porcelain crucibles and fast-cooled down to room temperature. In the second step, the materials were appropriately heat-treated to induce formation of crystallites of $$\beta$$ β , $$\delta$$ δ or $$\gamma$$ γ $$\hbox {Bi}_2\hbox {O}_3$$ Bi 2 O 3 phases confined in a glassy matrix, depending on the process conditions. It was found out that the vitrification of the initial $$\hbox {Bi}_2\hbox {O}_3$$ Bi 2 O 3 and the subsequent nanocrystallization were unexpectedly possible due to the presence of some Al, and Si impurities from the crucibles. Systematic DTA, XRD, optical, Raman and SEM/EDS studies were carried out to investigate the influence of the syntheses processes and allowed us to determine conditions under which the particular phases appear and remain stable down to room temperature.

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Section: Discussionmentioning

confidence: 99%