Our website is currently undergoing maintenance. Article records and full texts remain available. Submissions can be made through the Editorial Manager.

Low-Temperature Sintering and Microwave Dielectric Properties of Li₂O-3ZnO-5TiO₂ Ceramics Doped with B₂O₃

J. Liu, J. Zhu, J. Zhu, Y. Zeng

Journal of Ceramic Science and Technology, Vol. 10, No. 2 (2019), pp. 1-8

DOI: 10.4416/JCST2019-00055

Download full article (PDF)

Abstract

Phase composition, crystal structure as well as microwave dielectric properties of Li2O-3ZnO-5TiO2 ceramics (LZT135, for short) with the addition of B2O3 and TiO2 were investigated. X-ray diffraction (XRD) and energy-dispersive spectroscopy (EDS) results revealed that the samples with added B2O3 and sintered at 900 °C had formed solid solutions with a similar crystal structure to Zn2Ti3O8. When 0.25 wt% B2O3 was added, LZT135 ceramics could be densified at about 900 °C, while the negative τf value of about -31.5 ppm/K restricted its applications. TiO2 was added for further adjustment of the τf value of LZT135 ceramics. Finally, with the addition of 0.25 wt% B2O3 and 9 wt% TiO2, near zero τf values of about -0.5 ppm/K can be achieved for LZT135 ceramics, and at the same time, high Qf values of about 48 300 GHz are attractive for low-temperature co-firing ceramics technology.

Keywords

Microwave dielectric properties, LTCC, Li2O-3ZnO-5TiO2

View this issue · Article & DOI index