LOW-TEMPERATURE co-fired ceramic technology (LTCC) as the classical multilayer substrate technology improved the performance of electronic devices due to the use of the particular material systems which possess low sintering temperatures and compatibility with metal electrodes.1,2 However, the sintering temperatures of most of microwave dielectric ceramics are too high for use in LTCC technology. Therefore, the development of the low sintering temperature ceramics with good microwave dielectric properties has attracted much attention in recent years.