College of Materials Science and Engineering Nanjing University of Technology No.5 Xinmofan Road Nanjing 210009 China;
College of Materials Science and Engineering Nanjing University of Technology No.5 Xinmofan Road Nanjing 210009 China;
College of Materials Science and Engineering Nanjing University of Technology No.5 Xinmofan Road Nanjing 210009 China;
College of Materials Science and Engineering Nanjing University of Technology No.5 Xinmofan Road Nanjing 210009 China;
transition metal oxides; microstructure; thermal expansion; ionic conductivity;