Ca0.15Zr0.85O1.85 powder from oxalate precursor: Microwave aided synthesis and thermal characterization

Calcia stabilized zirconia (Ca0.15Zr0.85O1.85) (CSZ) an oxygen ion conducting electrolyte was synthesized from mixed oxalate precursor, namely calcium zirconyl oxalate (CZO). CZO heated in microwave heating system for 1 h yielded the stabilized zirconia in the cubic form at 400 degrees C. Same precursor (CZO) heated in resistance heated furnace for 1 h yielded pure CSZ at 800 degrees C. Thermogravimetry, differential thermal analysis and X-ray diffraction techniques were used to characterize the precursor and optimize the conditions for microwave processing. BET surface areas of CSZ powders prepared by conventional and microwave heating method at 800 and 400 degrees C are 3.28 and 4.46 m(2) g(-1), respectively. (C) 2008 Elsevier B.V. All rights reserved.