YBa2Cu3O7-delta films were produced on (00l) SrTiO3 single crystal substrates by a sustainable fluorine-free chemical solution deposition method. Using water as the primary solvent and low-cost precursors, a direct sintering process without calcination could be obtained. Variation of the heating rate towards the sintering temperature showed a strong effect on texture, surface morphology, phase purity and concurrent superconducting properties. Using an optimized heating rate of 5 degrees C min(-1), superconducting films were produced with an onset critical temperature of 92 K, a difference in critical temperature during transition of 1.8 K, a critical current density of 1.1 MA cm(-2) and a critical current of 50 A cm(-1) width at 77 K and self-field. (C) 2013 Elsevier B. V. All rights reserved.