“…The R 2 V 2 O 7 (R = Ba, Sr and Ca), BaO-MO-V 2 O 5 (M = Mg, Zn), and SrMV 2 O 7 (M = Mg, Zn) families have also been found to offer good microwave dielectric properties at ultra-low sintering temperatures [25,26]. By using a small Zn substitution, (Mg 1-x Zn x )V 2 O 6 ceramics (ɛ r~ 9.3, Qxf ~ 15,300 GHz @15.5 GHz and τ f ~ -3.4 ppm/°C) even can be sintered at 610°C [4]. In addition, the thermal and mechanical properties of some typical vanadate compositions such as BaV 2 O 6 and BiMg 2 VO 6 were investigated [23,27].…”