Zuo Yi Li, Lei Li, Xing Yu Chen, Xiao Jian Yan, Xiang Ming Chen
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引用次数: 0
Abstract
MgTiO3 and Mg2TiO4 are important commercial microwave dielectric ceramics, while MgTi2O5 ceramic as the last stable phase in MgO–TiO2 binary phase diagram has not attracted similar attention. In this study, MgTi2O5 ceramics were prepared by solid-state sintering, and the optimal microwave dielectric properties with εr = 18.6, Qf = 53,000 GHz, and τf = − 48.8 ppm/℃ were obtained for the sintering temperature of 1250 °C. CaTiO3 with a large positive τf was further introduced to compensate the large negative τf of MgTi2O5, and the optimal microwave dielectric properties of εr = 22.7, Qf = 39,900 GHz, and τf = 4.9 ppm/℃ were obtained in 0.9MgTi2O5–0.1CaTiO3 composite sintered at 1250 °C. Although the Qf value of the present 0.9MgTi2O5–0.1CaTiO3 composite is lower than that of the commercial MgTiO3–CaTiO3 counterpart with near-zero τf, it is expected to be improved by eliminating the color centers caused by oxygen deficiencies in MgTi2O5. Besides, the 0.9MgTi2O5–0.1CaTiO3 composite has a higher εr and a lower sintering temperature, indicating its potential application prospects in future microwave communications.
期刊介绍:
The Journal of Materials Science: Materials in Electronics is an established refereed companion to the Journal of Materials Science. It publishes papers on materials and their applications in modern electronics, covering the ground between fundamental science, such as semiconductor physics, and work concerned specifically with applications. It explores the growth and preparation of new materials, as well as their processing, fabrication, bonding and encapsulation, together with the reliability, failure analysis, quality assurance and characterization related to the whole range of applications in electronics. The Journal presents papers in newly developing fields such as low dimensional structures and devices, optoelectronics including III-V compounds, glasses and linear/non-linear crystal materials and lasers, high Tc superconductors, conducting polymers, thick film materials and new contact technologies, as well as the established electronics device and circuit materials.