Journal
CERAMICS INTERNATIONAL
Volume 43, Issue 1, Pages 484-490Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.09.183
Keywords
Microwaves; Dielectric materials/properties; Grain size; Morphology
Categories
Funding
- Natural Science Foundation of China [51372191]
- National Key Basic Research Program of China (973 Program) [2015CB654601]
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Mg1-xZnxSiO3 (x=0-0.3) ceramics were successfully synthesized by conventional solid-state methods and characterized by scanning electron microscopy, dispersive X-ray spectroscopy, and X-ray diffraction. The microstructures and microwave dielectric properties of Mg1-xZnxSiO3 ceramics were systematically investigated. The lattice parameters of the samples with different Zn2+ contents were analyzed. When the Zn2+ content was increased from 0 to 0.15, the Q(u)f(o) of the sample increased from 103,453 GHz to a maximum 138,481 GHz. This also resulted in a significant lowering in the sintering temperature (90 degrees C). Monoclinic structured Mg0.85Zn0.15SiO3 was detected without any secondary phase. In this study, a new combination of microwave dielectric properties (epsilon(r)similar to 8.05, Q(u)f(o)similar to 138,481 GHz, iota(p)similar to-14 ppm/degrees C) was achieved for Mg0.85Zn0.15SiO3 sample sintered at 1360 degrees C for 9 h. The prepared material with remarkable useful dielectric properties can be used for millimeter-wave applications.
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