The oxygen-permeation property of doped-zirconia membrane at high temperature and in reduced condition

2018 ◽  
Vol 43 (1) ◽  
pp. 293-300 ◽  
Author(s):  
Hee Jung Park ◽  
Jae-Kyo Yang ◽  
Yun-Ho Jin ◽  
Kyu Hyoung Lee
Keyword(s):  
High Temperature ◽  
Oxygen Permeation ◽  
Zirconia Membrane

Development of High Temperature Tantalum Polymer Capacitors

2018 ◽  
Vol 2018 (1) ◽  
pp. 000647-000651
Author(s):  
Antony P. Chacko ◽  
James Chen ◽  
Chris Stolarski ◽  
Cristina MotaCaetano ◽  
Philip Lessner
Keyword(s):  
High Temperature ◽  
Conducting Polymers ◽  
Protective Coating ◽  
Series Resistance ◽  
Oxygen Permeation ◽  
Equivalent Series Resistance ◽  
Study Analysis ◽  
Life Test ◽  
Material Technology ◽  
Polymer Oxidation

Abstract This paper focuses on the development of new 150°C capable surface mount polymer tantalum capacitors and the enabling technologies. The conductivity stability of the conducting polymers at high temperatures as well as the equivalent series resistance (ESR) stability of the polymer tantalum capacitors at these temperatures were investigated in this study. Analysis of the oxygen permeation paths causing polymer oxidation and materials solutions for preventing oxygen permeation and polymer oxidation are described. The development of new cathode and protective coating material technology is presented. Their effectiveness in providing high temperature ESR stability is demonstrated by high temperature life test at 150°C of polymer capacitors.

Preparation and Oxygen Permeability of ReBaCo2O5+δ (Re = Pr, Nd, Y) Ceramic Membranes

2012 ◽  
Vol 560-561 ◽  
pp. 959-964 ◽  
Author(s):  
Jong Pyo Kim ◽  
Dae Woong Pyo ◽  
Edoardo Magnone ◽  
Jung Hoon Park
Keyword(s):  
Carbon Dioxide ◽  
High Temperature ◽  
Solid State ◽  
Oxygen Permeability ◽  
Ceramic Membranes ◽  
Solid State Reaction Method ◽  
Oxygen Permeation ◽  
Permeation Flux ◽  
Reaction Method ◽  
Oxygen Permeation Flux

ReBaCo2O5+δ (Re=Pr, Nd, Y) oxides were synthesized by solid state reaction method. The oxygen permeation flux of ReBaCo2O5+δ (Re=Pr, Nd, Y) membranes increased with temperature and oxygen partial pressure and ranked as follow: PrBaCo2O5+δ > NdBaCo2O5+δ > YBaCo2O5+δ. The oxygen permeation response of PrBaCo2O5+δ membrane was fairly stable and no detectable degradation is observed at high temperature under carbon dioxide conditions (CO2 = 500 ppm).

Monitoring pH and Corrosion Potentials in High Temperature Aqueous Environments

CORROSION ◽  
1985 ◽  
Vol 41 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Leonard W. Niedrach ◽  
William H. Stoddard
Keyword(s):  
High Temperature ◽  
Elevated Temperatures ◽  
Corrosion Potential ◽  
Ph Sensor ◽  
Reference Electrode ◽  
Membrane Electrode ◽  
Redox Potentials ◽  
Aqueous Environments ◽  
Zirconia Membrane ◽  
Water Resistivity

Abstract A zirconia membrane electrode that responds to pH can serve admirably as a pH sensor in high temperature aqueous systems. Alternatively, under conditions of known, stable pH, the sensor may be used as a reference electrode for monitoring corrosion and redox potentials. Data are presented to illustrate the thermodynamic reliability and stability of such a sensor at elevated temperatures. An example of corrosion potential monitoring, including correlations with related ambient temperature measurements of pH, oxygen and hydrogen concentrations, and water resistivity, is given.

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