Synthesis of Ceria Zirconia Oxides using Solvothermal Treatment Siti Machmudah, Widiyastuti, Sugeng Winardi, Wahyudiono, Hideki Kanda and Motonobu Goto MATEC Web Conf., 156 (2018) 05014 Published online: 14 March 2018 DOI: 10.1051/matecconf/201815605014