A low-temperature sintered composite microwave dielectric ceramic material and its preparation method
A technology of microwave dielectric ceramics and low-temperature sintering, which is applied in the field of dielectric ceramics, which can solve the problems of high slurry viscosity, increased material dielectric loss, and inability to co-fire, and achieve high quality factor Qf, lower sintering temperature, and small temperature coefficient of resonance frequency Effect
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[0028] The material of the present invention consists of Li 2 O-Nb 2 o 5 -TiO 2 It is composed of a series material and a composite fever reducer accounting for 1-10% by weight of the main crystal phase, and the material of the invention can be obtained through solid-state reaction. Li 2 O-Nb 2 o 5 -TiO 2 The composition of the system material is Li a Nb b Ti c o 3 Among them: a=2.081, b=0.243, c=0.676. The raw materials for the manufacture of composite fever reducers include: lithium carbonate (Li 2 CO 3 ), zinc oxide (ZnO), aluminum oxide (Al 2 o 3 ), calcium oxide (CaO), silicon dioxide (SiO 2 ), boron trioxide (B 2 o 3 ) and trace additive components. Table 1 shows the data of several specific examples of the composition content of the present invention, and Table 2 shows the microwave dielectric properties of each example. The preparation method is as above, and the microwave dielectric performance is evaluated by the cylindrical dielectric resonator me...
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