Conclusion

Ces rappels bibliographiques nous montrent l’étendue des recherches déjà effectuées sur les capteurs potentiométriques. Le développement de capteurs potentiométriques « ouverts » tout solide semble le plus prometteur.

Les électrodes sensibles à base de carbonate de sodium présente l’avantage d’une importante conductivité à haute température et de réagir avec le dioxyde de carbone indépendamment de la pression partielle d’oxygène. Ces aspects certes connus ne sont jamais vérifiés dans la réalisation d’une électrode sensible.

Les mélanges d’oxydes permettent l’élaboration d’une électrode de référence sensible à la pression partielle d’oxygène pour les capteurs «ouverts ». Cependant, l’influence de la composition de ces électrodes n’a pas encore fait l’objet d’une étude approfondie.

Les études physiques et électriques des matériaux de nos capteurs potentiométriques « ouverts » à CO2 permettront d’optimiser les paramètres de travail et les performances de chaque composant (électrode de travail, électrode de référence et électrolyte). Cela nous amènera à proposer des capteurs planaires.

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