Title of article :
Fabrication and characterization of oxygen sensing properties of Dy l23 sensor utilizing hot spot phenomenon
Author/Authors :
HASSAN, M. Universiti Teknologi MARA - Faculty of Applied Sciences, Malaysia , YAHYA, A. K. Universiti Teknologi MARA - Faculty of Applied Sciences, Malaysia , KU HAMID, K. H. Universiti Teknologi MARA - Faculty of Chemical Engineering, Malaysia , AWANG, Z. Universiti Teknologi MARA (UiTM) - Microwave Technology Center, Malaysia
Abstract :
Characterization of oxygen sensing properties of DyBa2Cu3O7_δ (Dy123) sensor utilizing hot spot phenomenon has been conducted. The minimum electric field for the hot spot appearance is 1.5 V/cm. After the hot spot appearance, the output current strongly depended on oxygen partial pressure (PO2) at any selected voltage. The sensor showed very good stability and reproducibility of output current with the response time of about 5 s. The changing rate of output current increases when P02 decreases, with a maximum average value of 0.039 AJkPa at PO2 between 2.5-5 kPa. The sensor is suggested as a potential candidate for low-level oxygen detection.
Keywords :
Oxygen sensor , Dy123 , hot spot
Journal title :
Journal of Sustainability Science and Management
Journal title :
Journal of Sustainability Science and Management
