Search

In the present work, the microwave dielectric ceramic (Ag0.5Bi0.5)- (MO0 SW0 S)O4 was prepared by using the solid-state reaction method. (Ag0.5Bi0.5)- (MO0.5W0.5)O4 was found to crystallize in the scheelite structure, in which Ag+ and Bi3+ occupy the A site randomly with 8-coordination while Mo6+ and W6+ occupy the B site with 4-coordination, at a sintering temperature above 500 °C, with lattice parameters a = b = 5.29469(2) Å and c = 11.62114(0) Å, space group I41/a (No. 88), and acceptable Rp = 9.38, Rwp = 11.2, and Rexp = 5.86. High-performance microwave dielectric properties, with permittivity ~26.3, Qf value ~ 10000 GHz, and temperature coefficient ~+20 ppm/°C, were obtained in the sample sintered at 580 °C. Its chemical compatibility with aluminum at its sintering temperature was revealed and confirmed by both X-ray and energy dispersive spectrometer analysis. This ceramic could be a good candidate for ultralow-temperature cofired ceramics. [ABSTRACT FROM AUTHOR]