アルカリ土類アルミノケイ酸塩ガラスの等温熱処理における相変態

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タイトル別名
  • Phase Transformations of Alkaline-Earth Aluminosilicate Glasses during Isothermal Heat Treatment
  • アルカリ ドルイ アルミノ ケイサンエン ガラス ノ トウオン ネツ ショリ

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抄録

Phase transformations during the isothermal heat treatments of alkaline-earth aluminosilicate glasses with compositions of RO⋅Al2O3⋅2SiO2 (R=Mg, Ca, Sr, Ba) were studied based on the time-temperature-transformation (TTT) diagram. The crystallization conditions of metastable and stable phases such as cordierite (MgO⋅Al2O3⋅2.5SiO2), anorthite (CaO⋅Al2O3⋅2SiO2) and celsian (SrO⋅Al2O3⋅2SiO2, BaO⋅Al2O3⋅2SiO2), are determined. The onset time of crystallization is related to the viscosity of supercooled liquid measured in the previous works. The transformation processes of metastable-to-stable phases are discussed in terms of anion structure and cation radius.

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