Patent ID: 8372469

Claim:
Method for producing a film comprising a biocompatible material of the formula Na x K y NbO 3 , 0≦x≦0.8, 0.2≦y≦1, x+y=1, comprising: a) providing a Na-precursor and a K-precursor for Na x K y NbO 3 wherein the precursors are NaNb(OEt) 6 and KNb(OEt) 6 ; b) mixing the precursors in solution, wherein said precursors first react to form a sol and thereafter a gel; c) depositing the gel to a substrate to produce a film; d) heat treating the gel in the film at a temperature increasing from 200 to 1200° C. to obtain an oxide of the material Na x K y NbO 3 , 0≦x≦0.8, 0.2≦y≦1, x+y=1; and e) if necessary, repeating steps (c) and (d).