The present invention discloses a low temperature
sintering temperature-stable
microwave dielectric ceramic material and a preparation method thereof. According to the present invention, the formula comprises a base material and a
sintering auxiliary agent, wherein the
chemical composition expression formula of the base material is (1-x)Li2ZnTi3O8-xLi2TiO3, x is more than or equal to 0.3 and is less than or equal to 0.6, the
sintering auxiliary agent is ZnO-B2O3-SiO2 glass
powder, the amount of the sintering auxiliary agent is a% of the weight of the base material, and a is more than or equal to 0.50 and is less than or equal to 1.25; the
ceramic preparation process sequentially comprises: respectively pre-synthesizing Li2ZnTi3O8
powder and Li2TiO3
powder in a
calcination manner, preparing a base material according to the
molar ratio of the composition formula (1-x)Li2ZnTi3O8-xLi2TiO3, adding ZnO-B2O3-SiO2 glass powder, and carrying out ball milling, molding, molding agent removing and sintering to obtain the product; and the product sintering temperature can be reduced to below 950 DEG C, the relative
dielectric constant [epsilon]r can be adjusted within 22-26, the quality factor Qf is up to 33500-61200 GHz, and the resonant frequency
temperature coefficient [tau]f is -7.0-8.0 ppm / DEG C and is close to zero, such that the product can become a new LTCC material so as to be widely produced and continuously replace the existing material.