1. Advanced Materials Convergence Division, Korea Institute of Ceramic Engineering & Technology, Seoul 153-801, Korea
2. Department of Chemical and Environmental
Engineering, University of California—Riverside, California 92521, United States
3. Electrochemistry Department, Korea Institute of Materials Science, Changwon 641-831,
Korea
4. Department of Fine
Chemical
Engineering, Hanyang University, Ansan
426-791, Korea