Adhesion properties of CeO₂ films produced from different precursors using sol-gel process

CeO₂ films were deposited on Ni and Ag tapes by sol–gel process using nitrate, ammonium nitrate, colloidal, alkoxide, acetate, and oxalate based precursors and a detailed characterization of adhesion properties were performed in relation with structural features. The structural, microstructural and adhesion properties of the films heat-treated at 500 °C for 60 min in air were determined via XRD, ESEM and a mini tensile testing machine. The results showed that homogeneous films with cubic structure can be deposited on Ni and Ag tapes. The microstructure of the CeO₂ films could also be tailored by altering precursor type, solvent, chelating agent and modifying liquid. The CeO₂ joint samples with Ag tapes prepared from cerium(III)2,4 pentanedionate based solution exhibited the best adhesive properties because of polymeric sol and gel. The observed results in joint samples indicate a correlation between the failure types and the choice of solution from which CeO₂ films prepared.