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To quantify the chemical oxidation of PbS layers , S2 -- ions were determined spectrophotometri- cally [ 10 ] . ... resistance of the layer decreases ) , but the rate of PbO2 chemical destruction rises appreciably with oxidation time .
To quantify the chemical oxidation of PbS layers , S2 -- ions were determined spectrophotometri- cally [ 10 ] . ... resistance of the layer decreases ) , but the rate of PbO2 chemical destruction rises appreciably with oxidation time .
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Effect of the oxidation duration t on ( 1 ) the electrical resistance R , ( 2 ) chemical destruction rate v , and ( 3 ) PbS content in the layer after oxidation . The solution composition ( mol / l ) : Na2S2Og , 1.0 ; NaOH , 0.125 .
Effect of the oxidation duration t on ( 1 ) the electrical resistance R , ( 2 ) chemical destruction rate v , and ( 3 ) PbS content in the layer after oxidation . The solution composition ( mol / l ) : Na2S2Og , 1.0 ; NaOH , 0.125 .
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For alkali concentrations higher than 0.15 mol / l , PbS oxidation to PbO2 is accompanied by the destruction of the ( PbS + PbO2 ) layer , presumably , as a result of a redox reaction PbS + PbO2 + 4NaOH = Na2PbO2 + Na2PbO3 + H2S + H2O .
For alkali concentrations higher than 0.15 mol / l , PbS oxidation to PbO2 is accompanied by the destruction of the ( PbS + PbO2 ) layer , presumably , as a result of a redox reaction PbS + PbO2 + 4NaOH = Na2PbO2 + Na2PbO3 + H2S + H2O .
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Vol 48 No 9 | 1282 |
Simultaneous English language translation of the journal is available from MAIK NaukaInterperiodica Russia | 1446 |
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absorption acid activation analysis angles anion atoms band bond calculated cations Chem chemical Chemistry cm-¹ complexes components composition compounds concentration constant containing coordination Copyright corresponding crystal crystal structure curves decreases determined diagram distances effect electron energy experimental field formation formed function heating hydrogen increases Inorganic intensity interaction ions Journal Khim layer ligand materials measured melting metal method mixture molecules Moscow Neorg Note observed obtained oxidation oxygen parameters phase Physics positions prepared properties range ratio reaction REFERENCES refined reflections region respectively ring Russian salt samples Sciences shifts shown shows signals single sodium solid solid solutions solubility solutions space space group spectra spectrum spinel stability structure studied Synthesis Table temperature thermal tion trans transition Translation values vibrations X-ray diffraction