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Newsletter 141
 
News from
Norwegian Electro Ceramics AS
 

ProboStat

 

"MOSE" high precision Micropoas Oxygen Sensor assembly

We can now deliver MicroPoas oxygen sensor (Setnag, France), mounted ready for use in any standard ProboStat™ units. MicroPoas has built-in metal reference so no reference gas is required. It has high resistance to thermal shocks. This miniaturized sensor (diameter = 3 mm, length 10 mm) is suitable for measuring continuously partial pressure variation from 10-35 to 10 atm. Working temperature range for the normal version is 500 to 800°C, but high temperature version with range 600°C to 1050°C is also available. Both types can be made with either S- or K-type thermocouple. Instrumentation for reading the signal and measuring the temperature is optional. >1GΩ input impedance is required. Picture below shows the tip of the MOSE sensor next to a ProboStat™ sample support tube. Link

BZY disk samples

Several perovskite structured solid-oxide electrolytes hydrate in the presence of water vapour and become proton conducting below 700°C. Yttrium-substituted barium zirconate (BZY) is considered to be one of the candidate materials for proton ceramic fuel cells (PCFCs) and electrolyzer cells (PCEC) due to its high proton conductivity and chemical stability towards H2O and CO2 containing atmospheres. NorECs now offers in-house fabricated dense BZY button cells with NiO as sintering aid (BaZr0.85Y0.15O3 + 1 wt% NiO). They are suitable for tutorial studies of proton conduction, impedance spectroscopy of bulk, grain boundary, and electrode impedances, and standard electrolyte for testing of electrodes for PCFCs and PCECs.

Dimensions: Diameter ~18 mm, thickness 1-2 mm.

The disks can be mounted on any ProboStat™ system equipped with an up to 20 mm sample support tube assembly, or other user custom setups. Link

ProboStat™ base unit with selected 15 A feedthroughs

Standard ProboStat™ base units can now be delivered with high current capacity on selected electrical feedthroughs, tested with 15 A long-term. (Standard feedthroughs are rated at 5 A). Two feedthroughs can be connected in parallel to double the capacity. High current feedthroughs may be useful for ohmic heating of tubular gas separation membranes, for large-area electrodes on tubular fuel cells and electrolyzer cells, and for custom user setups. Note: High current feedthroughs require use of high-conductance wires in the hot zone, typically 1 mm diameter Pt or Ag, or 0.5 mm Au, to avoid overheating and melting of the contact, and that the contact to the wire is made with a high-temperature solder.

Sincerely,

NorECs team

Tel: (+47) 22 95 86 23
Fax: (+47) 22 60 44 27
Web: http://norecs.com/
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