1986 Fiscal Year Final Research Report Summary
Application of <BETA> -Alumina to the Research of Metallurgical Physical Chemistry
| Project/Area Number |
59470050
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
金属精錬・金属化学
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| Research Institution | Faculty of Engineering, Osaka University |
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Principal Investigator |
KOZUKA Zensaku Faculty of Engineering, Osaka University, 工学部, 教授 (80028935)
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| Co-Investigator(Kenkyū-buntansha) |
ITOH Mitsuru Faculty of Engineering, Osaka University, 工学部, 助手 (30151541)
YAO Shinya Faculty of Engineering,Osaka University, 工学部, 助手 (90029299)
KATAYAMA Iwao Faculty of Engineering, Osaka University, 工学部, 講師 (10029192)
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| Project Period (FY) |
1984 – 1986
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| Keywords | Beta-Alumina / Solid Electrolytes / Sodium Ion-Conductor / Metallurgical Physical Chemistry / EMF Measurement / 【SO_2】センサー |
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| Research Abstract |
The following( <I> )-( <IV> ) galvanic cells were constracted and equilibrium EMF were measured.
( <alpha> + <beta> )- <Al_2O_3> in air / <Na^+> - <beta> - <Al_2O_3> / <Na_2SO_4> / <SO_2> + <SO_3> +air ・・・・( <I> ),
Ag/ <Ag^+> - <beta> - <Al_2O_3> / <Ag_2SO_4> / <SO_2> + <SO_3> +air・・・・( <II> )
Na/ <Na^+> - <beta> "- <Al_2O_3> / <Na_2S> +Ag+ <Ag_2S> ・・・・・・( <III> ),
Pb/ <Pb^(2+)> - <beta> "- <Al_2O_3> /PbS+ <Ag_2> S+Ag ・・・・( <IV> ) From the EMF measurements of cells ( <I> ) and ( <II> ), it was found the contents of <SO_2> in air were estimated from the EMF values and the thin films of <Na_2SO_4> and <Ag_2SO_4> on the surfaces of <beta> - <Al_2O_3> solid electrolytes were easily produced from the reaction to the sample gas containing <SO_2> and <SO_3> .
From the cells ( <III> ) and ( <IV> ), the sulpher potentials in right sample electrodes were measured from EMF values and these values were good agreements with the calculated ones based on reliable thermodynamic values. In order to investigate the stability of <beta> and <beta> "- <Al_2O_3> , the activities of <Na_2O> solid AgI and <Ag_2S> and beta-alumina were investigated by means of EMF measurements and coulometric titration method of the following ( <V> ) and ( <VI> ) cells.
Na/ <beta> "- <Al_2O_3> /Ag+AgI+( <beta> "- <Al_2O_3> ) ・・・・・・( <V> )
Na/ <beta> "- <Al_2O_3> /Ag+ <Ag_2S> +( <beta> "- <Al_2O_3> ) ・・・・・( <VI> )
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