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A new sol–gel synthesis procedure of stable calcium copper titanate (CaCu 3 Ti 4 O 12 —CCTO) precursor sols for the fabrication of porous films was developed. The composition of the sol was selected in order to avoid the precipitation of undesired phases; ethanol was used as solvent, acetic acid as modifier and poly(ethyleneglycol) as a linker agent. Films deposited by spin-coating...
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