Thin films of the composition 8% Y2O3–92% ZrO2 (8YSZ) as gas-sensing materials for oxygen detection

Resumo

The synthesis of hydrolytically active heteroligand precursors of the composition [M(O₂C₅H₇)_x(ⁱOC₅H₁₁)_y] (M = Zr⁴⁺ and Y³⁺) using zirconium and yttrium acetylacetonates was investigated. It was shown that the reactivity of the obtained precursors in hydrolysis and polycondensation depends on the composition of the coordination sphere. It was studied how thin films of their solutions are applied by dip coating to the surface of Al₂O₃ substrates with platinum interdigital electrodes and a microheater. A study was made of the effect of the crystallization conditions and thickness of the oxide coatings of the composition 8 mol % Y₂O₃–ZrO₂ on their microstructure and sensor characteristics in oxygen detection.