MS-LT composite microwave dielectric ceramic and preparation method thereof

The invention provides an MS-LT composite microwave dielectric ceramic, which has a general formula shown in the following formula: Mg2.1-xCoxSiO4-Li2TiO3, wherein x = 0-0.1, and the mass percentage of Li2TiO 3 in the MS-LT composite microwave dielectric ceramic is 0-40%. Compared with the prior art, the MS-LT composite microwave dielectric ceramic takes a composite oxide with the specific generalformula as a main material, and can realize the dielectric constant between 7 and 10 and the continuous adjustment of the frequency temperature coefficient by adjusting the content of the Li2TiO3. Inaddition, the MS-LT composite microwave dielectric ceramic has a stable structure, a specific dielectric constant and a higher Q * f value, and the resonant frequency temperature coefficient is continuously adjustable. Experimental results show that the dielectric constant of the MS-LT composite microwave dielectric ceramic is 7-9.7, and the Q * f is more than or equal to 41200 GHz, and can reach135,600 GHz. Compared with