Low loss MgAl2O4 ceramics for terahertz windows S.V. Egorov, A.A. Sorokin, I.E. Ilyakov, B.V. Shishkin, V.V. Parshin, S.S. Balabanov and A.V. Belyaev EPJ Web Conf., 187 (2018) 01004 Published online: 03 September 2018 DOI: 10.1051/epjconf/201818701004