scholarly journals Activity measurement of Ga in liquid Ga-Pb alloys by EMF method with zirconia solid electrolyte

2002 ◽  
Vol 38 (3-4) ◽  
pp. 229-236 ◽  
Author(s):  
I. Katayama ◽  
Dragana Zivkovic ◽  
Dragan Manasijevic ◽  
T. Oishi ◽  
Zivan Zivkovic ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Composition Range ◽  
Electrochemical Cell ◽  
Experimental Methods ◽  
Entire Composition Range ◽  
Activity Measurement ◽  
Published Data ◽  
Emf Method ◽  
Positive Deviation ◽  
Duhem Equation

EMF measurement of the electrochemical cell with zirconia as solid electrolyte was performed to determine the gallium activity from 950 to 1150K in the entire composition range of liquid Ga-Pb alloys. In the whole concentration range, activity of Ga shows moderately positive deviations from ideality, and activity of Pb which is derived by Gibbs- Duhem equation shows also positive deviation from ideality. These are compared with published data obtained by different experimental methods.

scholarly journals Activity measurement of solid Cu-In alloys by EMF method with solid electrolyte

2002 ◽  
Vol 38 (1-2) ◽  
pp. 23-31 ◽  
Author(s):  
I. Katayama ◽  
K. Miyakusu ◽  
T. Iida
Keyword(s):  
Solid Electrolyte ◽  
Thermodynamic Activity ◽  
Activity Measurement ◽  
Published Data ◽  
Emf Method ◽  
Free Energies ◽  
Temperature Range

The thermodynamic activity of indium in the solid Cu-In alloys was obtained from the EMF measurement of cell: In,In2O3, ZrO2(+11mol%CaO), Cu-In,In2O3 for 16 alloys in the temperature range 773 to 900K. Activity changes with composition at 823K are very large in the and - phase regions. Activity and free energies of formation are derived and compared with the published data.

scholarly journals Thermodynamic study of semiconducting related materials by use of EMF method with solid electrolyte

2003 ◽  
Vol 39 (3-4) ◽  
pp. 453-464 ◽  
Author(s):  
Iwao Katayama ◽  
Toshihiro Tanaka ◽  
Takamichi Iida
Keyword(s):  
Solid Solution ◽  
Solid Electrolyte ◽  
Thermodynamic Functions ◽  
Electromotive Force ◽  
Experimental Methods ◽  
Thermodynamic Study ◽  
Published Data ◽  
Emf Method ◽  
Force Method ◽  
Electromotive Force Method

Electromotive force method with solid electrolyte is briefly explained, and a thermodynamic study of semi conducting compound solid solution ZnTe-CdTe is picked up to show the way how thermodynamic functions of this system are obtained by several experimental methods based on our published papers and recently published data are added for comparison.

scholarly journals Activity Measurement of Mn–Bi Alloys by the EMF Method with CaF2 Solid Electrolyte

1990 ◽  
Vol 31 (9) ◽  
pp. 789-792 ◽  
Author(s):  
Iwao Katayama ◽  
Seiji Matsushima ◽  
Zensaku Kozuka
Keyword(s):  
Solid Electrolyte ◽  
Activity Measurement ◽  
Emf Method

Experimental Determination fo Ga Activity in Liquid Ga-Sb-Tl Alloys by EMF Method

2007 ◽  
Vol 127 ◽  
pp. 71-76
Author(s):  
Iwao Katayama ◽  
Yusuke Sendai ◽  
Dragana Zivkovic ◽  
Dragan Manasijević ◽  
Zivan Zivkovic ◽  
...  
Keyword(s):  
Experimental Determination ◽  
Solid Electrolytes ◽  
Composition Range ◽  
Galvanic Cell ◽  
Emf Method ◽  
Positive Deviation ◽  
Raoult’S Law ◽  
Cell Temperature ◽  
Cell Potential ◽  
Raoult's Law

EMF of galvanic cell with zirconia –based solid electrolytes was measured to determine the activity of Ga in liquid Ga-Sb-Tl alloys between 946 and 1233 K along the tree pseudobinary lines of Ga-(Sb/Tl), (xSb/xTl = 1/3, 1/1 and 3/1) The cell used was: Ga,Ga2O3|(ZrO2)0.92(Y2O3) 0.08|Ga-Sb-Tl, Ga2O3. The activity of Ga (aGa ) was derived by :-3EF = RT ln aGa , where E is cell potential, F is Faraday’s constant, R is gas constant and T is cell temperature. The activity of Ga shows slight negative deviations from ideality in the section with positive deviation from ideality in the whole composition range. The activity of gallium shows slight negative deviations from Raoult’s law in the section with xSb/xTl = 3/1, moderately positive deviations in xSb/xTl =1/1 section and large positive deviations in xSb/xTl =1/3 section.

scholarly journals Activity Measurement of Gallium in Ga–Bi and Ga–Sb–Bi Alloys by EMF Method Using Zirconia as Solid Electrolyte

1993 ◽  
Vol 34 (9) ◽  
pp. 792-795 ◽  
Author(s):  
Iwao Katayama ◽  
Jun-ichiro Nakayama ◽  
Tsuneo Ikura ◽  
Zensaku Kozuka ◽  
Takamichi Iida
Keyword(s):  
Solid Electrolyte ◽  
Activity Measurement ◽  
Emf Method

Activity Measurement of Liquid Sn-Ag-Bi Alloys by Fused Salt EMF Method

2005 ◽  
Vol 502 ◽  
pp. 129-138 ◽  
Author(s):  
Iwao Katayama ◽  
Toshihiro Tanaka ◽  
Shin-ichi Akai ◽  
Kisao Yamazaki ◽  
Takamichi Iida
Keyword(s):  
Binary Systems ◽  
Composition Range ◽  
Excess Free Energy ◽  
Ternary Alloys ◽  
Activity Measurement ◽  
Duhem Equation ◽  
Fused Salts ◽  
Energy Of Mixing ◽  
Free Energy Of Mixing ◽  
Small Positive Deviation

Activity of tin in liquid Sn-Ag-Bi alloys was derived by EMF measurement of galvanic cell with fused salts electrolyte in the temperature range of 700 to 900K in the whole composition range. Activity of tin at 900K shows very small positive deviation from Raoult’s low for Sn-Bi alloys. Activity of ternary alloys was measured along three pseudo binary systems of Sn-(Ag,Bi) (where xAg/xBi =1/3,1/1 and 3/1). Its concentration dependence is very complex. From the iso-activity curves in the ternary system excess free energy of mixing is derived using Darken’s method for Gibbs-Duhem equation

scholarly journals Activity Measurement of FexO in FexO-B2O3 System Molten Slag by EMF Method Using Zirconia Solid Electrolyte.

1994 ◽  
Vol 7 (1) ◽  
pp. 67-75
Author(s):  
Noboru TAGUCHI ◽  
Takao OTOMO ◽  
Kazuo KOIKE ◽  
I CHYO ◽  
Minehiro MIZUNO
Keyword(s):  
Solid Electrolyte ◽  
Molten Slag ◽  
Activity Measurement ◽  
Emf Method

Activity measurement of gallium in the B2 phase of the CoGa–Sb system by the EMF method with zirconia-based solid electrolyte

2003 ◽  
Vol 11 (11-12) ◽  
pp. 1161-1165 ◽  
Author(s):  
Iwao Katayama ◽  
Tadashi Matsui ◽  
Toshio Oishi
Keyword(s):  
Solid Electrolyte ◽  
Activity Measurement ◽  
Emf Method ◽  
B2 Phase

scholarly journals Calculation of activities in Ga-Cd and Cu-Pb binary systems

2002 ◽  
Vol 38 (3-4) ◽  
pp. 273-284 ◽  
Author(s):  
Dragan Manasijevic ◽  
Dragana Zivkovic ◽  
Zivan Zivkovic
Keyword(s):  
Melting Point ◽  
Phase Diagrams ◽  
Binary Systems ◽  
Composition Range ◽  
Entire Composition Range ◽  
Melting Point Depression ◽  
Calculation Methods ◽  
Duhem Equation ◽  
Coexisting Phases ◽  
Mutual Comparison

Calculations of activities in Ga-Cd and Cu-Pb binary systems were done based on their known phase diagrams, using different calculation methods. First, activities of cadmium at 700 K and copper at 1263 K in Ca - Cd and Cu - Pb systems, respectively, were calculated by melting point depression method and Zhang-Chou method for binary systems with phase diagrams involving two liquid or solid coexisting phases. In order to obtain activity values in the entire composition range, these methods were applied in the definite parts of composition range in both investigating systems. The same procedure was done, using modified Rao- Belton method by Chou, who used Richardson assumption. Activities of the second component in both investigating systems were calculated by use of Gibbs-Duhem equation. All calculated results were compared with literature data and mutual comparison between applied methods was done.

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