1National Institute for Resources and Environment (NIRE), 16-3 Onogawa, Tsukuba-shiIbaraki 305Japan
2Department of Applied Chemistry, Nagoya University, Furocho, Chikusa-kuNagoya 464-01Japan
3Systems Research and Development Institute of Japan, 16-5 Tomihisacho, Shinjuku-kuTokyo 162Japan
4Japan Fine Ceramics Association, Halifax Onarimon Bldg. 6F, 3-24-10, Nishi-shinbashi, Minato-kuTokyo 105Japan