Spin Coated YSZ Thin Films on Silicon Substrate
Yttria Stabilized Zirconia (YSZ) thin films (<10 μm) were fabricated by spin coating technique on silicon (Si). Parameters such as concentration ratio of YSZ powder to solvent were varied accordingly. The effects of these variations were investigated and discussed. Using X-ray Diffraction and Raman Spectroscopy, the crystal structure of the samples were determined. The 8-YSZ thin films have cubic fluorite structure. The X- ray diffraction patterns were in agreement with the samples' Raman spectra. Pores were evident on single coated substrates but were minimized using higher YSZ concentration. Index Terms—Yttria Stabilized Zirconia,YSZ, spin-coating, thin film ——————————  ——————————
Fabrication and performance of anode-supported YSZ films by slurry spin coating
Yttria-stabilized zirconia (YSZ) thin films were fabricated by slurry spin coating on NiO-YSZ anode substrates. The effect of processing factors, such as the baking temperature and spinning number was investigated and discussed. According to the thermogravimetric analysis, the organic additives could be removed by baking at 400 degrees C for 10 min. Under this heating condition for each coating, the defects in the electrolyte film could be repaired by repetitive coating. Dense and crack-free electrolyte films were consequently obtained. When dry hydrogen was used as the fuel and the stationary air as the oxidant, a single cell based on a 14-mu m-thick YSZ film produced open-circuit voltages (OCVs) of > 1.10 V in all of the operating temperatures (500-700 degrees C). The cell exhibited maximum power densities of 634, 493 and 316 mW/cm(2) at 700, 650 and 600 degrees C, respectively. By using pure oxygen at a flow rate of 100 mL/min, the maximum power density increased to 658 mW/cm(2) at 650 degrees C. (c) 2006 Elsevier B.V. All rights reserved.
Thermodynamics on the Carbochlorination of Titanium-bearing Ores
The equilibrium compositions of the multi-component, multi-phase and multi-reaction system of carbochlorination of titanium-bearing ores are calculated with HSC, a computational chemistry software. The thermodynamic equilibrium calculation of the reaction system shows that a complete conversion of titanium-bearing ores is feasible at a temperature near 200oC. At temperatures ranging from 800 to 1600oC, the products of the reaction system are all in gaseous phase. Thermodynamic analysis accords with the industrial practice. The simulated results provide reasonable scientific basis for improving suitable technological conditions of the carbochlorination reduction.