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  • 1
    Digitale Medien
    Digitale Medien
    The Activity Coefficients of HCl in HCl–Na2SO4 Solutions from 0 to 50°C and Ionic Strengths Up to 6 Molal (1997)
    Springer
    Journal of solution chemistry 26 (1997), S. 31-45 
    Details
    ISSN: 1572-8927
    Schlagwort(e): Activity coefficient ; electromotive force ; Pitzer ; HCl ; Na2SO4 ; NaHSO4
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract The electromotive force of HCl–Na2SO4 solutions has been determined from 5 to 50°C and ionic strengths from 0.5 to 6m with a Harned type cell $${\text{Pt; H}}_{\text{2}} ({\text{g, 1 atm}})|{\text{HCl(}}m_1 {\text{) + Na}}_{\text{2}} {\text{SO}}_{\text{4}} {\text{(}}m_2 {\text{)}}|{\text{AgCl, Ag}}$$ The results have been used to determine the activity coefficient of HCl in the mixtures. The activity coefficients have been analyzed with the Pitzer equations to account for the ionic interactions. The measurements were used to determine interaction coefficients (β0, β1) for NaHSO4 solutions from 5 to 50°C. The model represents the mean activity coefficients of HCl in the mixtures to ±0.005 over the entire temperature and concentration range of the measurements. The results have been combined with literature data to provide parameters that are valid from 0 to 250°C for NaHSO4 solutions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1024433011426
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    The activity coefficiencts of HCl in HCl−Na2SO4 solutions from 0 to 50°C and ionic strengths up to 6 molal (1997)
    Springer
    Journal of solution chemistry 26 (1997), S. 31-45 
    Details
    ISSN: 1572-8927
    Schlagwort(e): Activity coefficient ; electromitive force ; Pitzer, HCl ; Na2SO4 ; NaHSO4
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract The electromotive force of HCl−Na2SO4 solutions has been determined from 5 to 50°C and ionic strengths from 0.5 to 6m with a Harned type cell $$Pt; H_2 (g, 1 atm)|HCl(m_1 ) + Na_2 SO_4 (m_2 )|AgCl, Ag$$ The results have been used to determine the activity coefficient of HCl in the mixtures. The activity coefficiencts have been analyzed with the Pitzer equations to account for the ionic interactions. The measurements were used to determine interaction coefficients (β0, β1) for NaHSO4 solutions from 5 to 50°C. The model represents the mean activity coefficients HCl in the mixtures to ±0.005 over the entire temperature and concentration range of the measurements. The results have been combined with literature data to provide parameters that are valid from 0 to 250°C for NaHSO4 solutions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02439442
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Alkoxide Derived SrBi2Ta2O9 Phase Pure Powder and Thin Films (1997)
    Springer
    Journal of sol gel science and technology 9 (1997), S. 95-101 
    Details
    ISSN: 1573-4846
    Schlagwort(e): SrBi2Ta2O9 ; sol-gel ; thin films ; ferroelectric non-volatile memories
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Phase pure powder and thin films of the novel ferroelectric materials SrBi2Ta2O9 (SBT) have been prepared using the organic precursors. The xero-gel formed was dried and characterized using TGA and DTA to determine the organic burn out and crystallization temperature of SBT. Powder X-ray diffraction was used systematically to check the crystallinity of SBT. Phase pure SBT powder was formed as low as 650°C and thin films at 600°C in comparison to other earlier reported work. SEM micrographs show a grain size of ∼0.1 μm and show crack free films with a film thickness of 2 μm.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1026468525300
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Alkoxide derived SrBi2Ta2O9 phase pure powder and thin films (1997)
    Springer
    Journal of sol gel science and technology 9 (1997), S. 95-101 
    Details
    ISSN: 1573-4846
    Schlagwort(e): SrBi2Ta2O9 ; sol-gel ; thin films and ferroelectric non-volatile memories
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Phase pure powder and thin films of the novel ferroelectric materials SrBi2Ta2O9 (SBT) have been prepared using the organic precursors. The xero-gel formed was dried and characterized using TGA and DTA to determine the organic burn out and crystallization temperature of SBT. Powder X-ray diffraction was used systematically to check the crystallinity of SBT. Phase pure SBT powder was formed as low as 650°C and thin films at 600°C in comparison to other earlier reported work. SEM micrographs show a grain size of ≈0.1 μm and show crack free films with a film thickness of 2 μm.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02439340
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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