Ion implantation and diffusion of zinc in dense SnO2 ceramics

*National Institute for Materials Science (NIMS), 1–1 Namiki, Tsukuba, Ibaraki 305–0044, Japan **Isotope Imaging Laboratory, Creative Research Institution, Hokkaido University, Sapporo 001–0021, Japan ***Natural History Sciences, Hokkaido University, Sapporo 060–0810, Japan ****Materials Research Center for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226–8503, Japan