溶解Na_2SO_4中における塩基度の電気化学的制御とAl_2O_3, Cr_2O_3およびSiO_2の溶解挙動

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タイトル別名
  • Electrochemical Control of Basicity of Fused Na2SO4 and Solubility of Al2O3, Cr2O3 and SiO2.
  • 溶融Na2SO4中における塩基度の電気化学的制御とAl2O3,Cr2O3およびSiO2の溶解挙動
  • ヨウユウ Na2SO4 チュウ ニ オケル エンキド ノ デンキ カガクテキ セイギョ ト AI2O3 Cr2O3 オヨビ SiO2 ノ ヨウカイ キョドウ

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説明

The basicity of fused Na2SO4 at 1173 K was successfully controlled by the electrolysis of the salt with platinum electrodes. With progress of the electrolysis, the basicity of the fused salt decreased in the anolyte and increased in the catholyte. The changes in solubility of Al2O3, Cr2O3 and SiO2 powders in the fused Na2SO4 were examined as a function of the basicity of it using the electrolysis method. The changes in the basicity of the fused salt both for increasing and decreasing resulted in an increase of the solubility of Cr2O3 and more significantly of Al2O3. On the other hand, the solubility of SiO2 was independent of the basicity and was extremely low in the acidic region, whereas that increased with decreasing the basicity in the basic region.

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