ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Limiting-current type surface modified gas sensor based on β″-alumina fast solid ionic conductor (1991)
    Springer
    Applied physics 52 (1991), S. 94-99 
    Details
    ISSN: 1432-0630
    Keywords: 66.30 ; 82.45 ; 82.80 ; 85.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A new type of limiting current solid state ionic gas sensor is presented. The sensor is based on the reaction of the gaseous species with the electroactive component under the condition of limited access of the gas by a kinetic barrier. This allows one to employ the available fast solid alkali metal, silver and copper ionic conductors at ambient, and moderately increased temperatures. Theoretical considerations are presented and compared to experimental results of this type of limiting-current surface modified solid state electrochemical chlorine gas sensors. A linear relationship between the electrical current and the gas concentration is observed. The device may be operated at low temperatures, is sensitive to low partial gas pressures and may also overcome problems of cross-sensitivity. Sensors for gases other than chlorine may be based on the same principles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00323722
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    ϑ-Sensors: A new concept for advanced solid-state ionic gas sensors (1992)
    Springer
    Applied physics 55 (1992), S. 250-257 
    Details
    ISSN: 1432-0630
    Keywords: 66.30 ; 82.45 ; 82.80 ; 85.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A new principle of solid state electrochemical sensors based on the kinetics of controlled chemical reactions of the gas with the electroactive species of a solid electrolyte is presented and demonstrated for the measurement of CO2 partial pressures. The reaction may be for many gases modified by the formation of intermediate product phases. A periodic voltage or current signal is applied to the electrolyte. The current corresponds to alternating chemical reactions at the electrodes in contact with the gas. The new concept avoids the often complicated application of reference electrodes and shows characteristic signals for different types of gases and allows in this way to overcome problems of cross-sensitivity. The experimental results show high accuracy with an approximately linear relationship between the current and the CO2 partial pressure and also show extraordinarily fast response.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00348393
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Solid ionic conductor/semiconductor junctions for chemical sensors (1993)
    Springer
    Applied physics 57 (1993), S. 37-43 
    Details
    ISSN: 1432-0630
    Keywords: 66.30 ; 72.20 ; 73.20 ; 73.30 ; 85.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The potential drop at solid ionic conductor/semiconductor contacts responds to partial pressure changes of gases since the Fermi level of the semiconductor depends on the adsorbed species and equilibrates with that of the ionic conductor. In an alternative consideration, the semiconductor acts as a catalyst for the reaction of the mobile ions of the solid ionic conductor with the adsorbed species. The junction is employed as a chemical sensor for the detection of CO2 by using NASICON as solid electrolyte and doped SnO2 as semiconductor. The device is applicable even at room temperature with fast response time. Mechanisms of the response of the junction to gases are discussed in detail. The principle of employing solid ionic conductor/semiconductor junctions for sensors is in general applicable for many gases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00331214
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Investigation of solid sodium reference electrodes for solid-state electrochemical gas sensors (1993)
    Springer
    Applied physics 57 (1993), S. 31-35 
    Details
    ISSN: 1432-0630
    Keywords: 64.00 ; 85.80 ; 82.45
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Several types of solid reference electrodes for potentiometric gas sensors based on solid sodium ion conductors (e.g., Na+-β/β″-Alumina or NASICON) are described and the observed experimental results are discussed in view of theoretical predictions. Defined sodium activities are established by appropriate equilibria of binary and ternary phases. The binary systems Na-Sb and Na-Bi, and the ternary systems Na-M-O (M is a transition-metal, Co or Ni) were found to show excellent kinetic performance and are capable to fix the chemical potential of sodium well defined over extended periods of time. Some of the sodium reference electrodes are even stable in air. The results are compared with the application of elemental sodium as reference electrode.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00331213
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...