Abstract
(Mg 1− x Zn x ) 2SiO 4 ceramics were prepared and characterized. The densification temperatures of the present ceramics are much lower than those for Mg 2SiO 4 and Zn 2SiO 4 end-members. Small solid solution limits of Zn in Mg 2SiO 4 and Mg in Zn 2SiO 4 are observed, and the bi-phase structure is confirmed in (Mg 1− x Zn x ) 2SiO 4 ceramics with x = 0.1–0.9. Even though, it is clear that the Qf value of Zn 2SiO 4 ceramics can be significantly improved together with a suppressed temperature coefficient of resonant frequency τ f by substituting Mg for Zn. (Mg 0.4Zn 0.6) 2SiO 4 ceramics indicate a good combination of microwave dielectric characteristics: ɛ r = 6.6 Qf = 95,650 GHz, and τ f = −60 ppm/°C.
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