High quality factor of (Zn0.6Mg0.4)1.918GeO3.918 microwave dielectrics

Influence of Lithium Substitution for Zinc on Crystal Structure and Microwave Dielectric Properties of Willemite Li2x Zn2−x GeO4

“…18 However, Eoh et al reported that nominal starting composition Zn 2 GeO 4 could not form a single phase but with the ZnO secondary phase, which was successfully removed by reducing the mole ratio of Zn to 1.918. 20 And the quality factor was significantly improved to above 270,000 GHz by substitution of 0.4 mol% Mg for Zn due to the improved cation ordering and the suppression of the second phase. Our previous work on phase formation of Zn 2 GeO 4 is consistent with Eoh's result and Ge excess favored the formation of single phase and enhanced the dielectric performances with a Q × f ∼ 112,700 GHz in Zn 2 Ge 1.1 O 4.4 .…”