Microwave medium ceramic material with low-temperature sintering spinel structure and preparation method thereof

The invention discloses a microwave medium ceramic material with a low-temperature sintering spinel structure and a preparation method thereof. The microwave medium ceramic material with the low-temperature sintering spinel structure contains 97-100 percent by weight of Li2MTi3O8 and 0-3 percent by weight of material with low melting point, wherein M is Zn or Mg; and the material with the low melting point is B2O3 or BaCu(B2O5) or V2O5. The material can be obtained by a solid-phase reaction. The microwave medium ceramic with a low-temperature sintering spinel structure (LTCC) has low sintering temperature (about 900DEG C) and excellent microwave performance: large dielectric constant (epsilon r), high Q*f value and small tau f; the microwave medium ceramic material does not react with Ag and can be co-fired by using pure Ag as an electrode; in addition, the invention can greatly reduce the manufacturing cost of a device, can be used for manufacturing a low-temperature cofiring ceramic system (LTCC), a multilayer medium resonator, a microwave antenna, a filter and other microwave devices.