Effect of Third Oxides Added in Liquid Na<SUB>2</SUB>O·2SiO<SUB>2</SUB> upon Activity of Soda

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  • Na<SUB>2</SUB>O·2SiO<SUB>2</SUB>系融体中のNa<SUB>2</SUB>Oの活量に及ぼす第三成分の影響
  • Na2O・2SiO2系融体中のNa2Oの活量に及ぼす第3成分の影響
  • Na2O 2SiO2ケイ ユウタイチュウ ノ Na2O ノ カツリョウ ニ オ
  • Effect of Third Oxides Added in Liquid Na<SUB>2</SUB>O&middot;2SiO<SUB>2</SUB> upon Activity of Soda

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The activity of Na2O has been measured, when “third oxide”, Li2O, Al2O3, CaO, Fe2O3 or B2O3 has been added up to 12 mol% to Na2O·2SiO2 melt at 1173 K to 1673 K.<BR>The activity was obtained from the electromotive force of the Galvanic cell with solid electrolyte of beta-Na2O·11Al2O3 as follows:<BR>(This article is not displayable. Please see full text pdf.) <BR>The activity of soda was increased by addition of Li2O, Al2O3, CaO and decreased by B2O3. Ferric oxide did not affect the activity of soda.<BR>The values of (dlogγNa<SUB>2O</SUB>)⁄(d mol%MO) were 0.07 for Li2O, 0.05 for Al2O3, 0.04 for CaO, zero for Fe2O3 and −0.05 for B2O3 at 1573 K.

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