ALTERNATIVE ROUTE FOR SYNTHESIS OF BARIUM TITANYL OXALATE - MOLECULARPRESCURSOR FOR MICROCRYSTALLINE BARIUM-TITANATE POWDERS

An important molecular precursor to barium titanate, namely, barium ti tanyl oxalate [BaTiO (C2O4)(2) . 4H(2)O], has been synthesized by an a lternative route, An alcoholic solution containing 1 mol of butyl tita nate monomer [(C4H9O)(4)Ti] is reacted with alcoholic solution contain ing 2 mot of oxalic acid (H2C2O4:2H(2)O) to form art intermediate solu ble oxalotitanic acid [H2TiO(C2O4)(2) . nH(2)O]. The oxalotitanic acid in alcoholic medium is subjected to cation exchange reaction with aqu eous solution containing equimolar barium acetate to form an insoluble barium titanyl oxalate (BTO) in yields of 80-85% at room temperature, The pyrolysis of BTO in air at T approximate to 750 degrees C/5 h pro duced barium titanate (BT) powders.