Abstract
In this study, scandia-stabilized zirconia (ScSZ) electrolyte thin-film layers were deposited via chemical solution deposition (CSD). We selected 10ScSZ (10% Sc 2 O 3 , 90% ZrO 2 molar ratio) as the target material, and the precursor solution was prepared by precise calculations. The 10ScSZ solution was deposited on Al2O3 substrate using a spin-coating method. Then, the substrate was sintered using two methods: flash light irradiation and thermal. The characteristics of the thin films were compared, including ionic conductivity, surface morphology, and chemical composition. Pulsed light sintering was applied in the sintering step under a variety of energy density conditions from 80 to 130 J/ cm 2 , irradiation on/off times of 10 ms and 10 ms/500 ms, number of pulses, and bottom heat from 300 to 600 °C. The ionic conductivity of the ScSZ electrolyte layers fabricated by thermal or flash light irradiation methods was tested and compared. The results show that the ScSZ electrolyte layer sintered by flash light irradiation within a few seconds of process time had similar ionic conductivity to the electrolyte layer that was thermal sintered for about 10 h including cooling process.
Highlights
IntroductionSolid oxide fuel cells (SOFCs) have emerged as potential energy conversion devices for electricity and heat generation due to their high energy conversion efficiency and eco-friendly characteristics
Solid oxide fuel cells (SOFCs) have emerged as potential energy conversion devices for electricity and heat generation due to their high energy conversion efficiency and eco-friendly characteristics.a high operating temperature (800–1000 ◦ C) is usually required for adequate performance because the ionic transport of oxygen through ceramic electrolytes is sluggish
We demonstrated a novel flash light sintering method to fabricate scandia-stabilized zirconia thin film
Summary
Solid oxide fuel cells (SOFCs) have emerged as potential energy conversion devices for electricity and heat generation due to their high energy conversion efficiency and eco-friendly characteristics. A conventional thermal furnace sintering method requires tens of hours, including cooling time, and consumes a vast amount of energy during the process These manufacturing limitations are obstacles in the commercialization of many devices with oxide thin films requiring high-temperature post-heat treatment processes. We adopted a novel sintering technique with high-power flash light irradiation of a visible wavelength range from 380 to 980 nm This innovative method considerably reduced the post-heat treatment process time from hours to seconds.
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