College of Information Science and Engineering;
Guilin University of Technology;
Guilin 541004;
China;
School of Materials Science and Engineering;
Nanchang University;
Nanchang 330031;
China;
Guangxi Universities Key Laboratory of Non-Ferrous Metal Oxide Electronic Functional Materials and Devices;
College of Material Science and Engineering;
Guilin University of Technology;
Guilin 541004;
China;
ceramics; dielectric properties; melilite structure; compositional modulation;