Effect of Potassium Oxide Addition on Viscosity of Calcium Aluminosilicate Melts at 1673–1873 K

1) Department of Materials Science and Engineering, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka, 819-0395 Japan. 2) Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, 980-8577 Japan. 3) Materials Characterization Research Laboratory, Advanced Technology Research Laboratories, Nippon Steel and Sumitomo Metal Corporation, 20-1 Shintomi, Futtsu, 293-8511 Japan. 4) Department of Decommissioning and Waste Management, Nuclear Science Research Institute, Tokai Research and Development Center, Japan Atomic Energy Agency, 2-4, Shirakatashirane, Tokai-mura, Naka-gun, Ibaraki, 319-1195 Japan.