Correlation between the structure and modified microwave dielectric characteristics of Zr4+ substituted Ni0.4Zn0.6Ti(1-x)ZrxNb2O8 ceramics |
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| Affiliation: | 1. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, China;2. National Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Chengdu, 610054, China;3. China Key System & Integrated Circuit Co., Ltd. Wuxi, 214035, China |
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| Abstract: | Microwave ceramics are an important classes of materials that are used in microwave communication systems, especially in the area of 5G wireless communication and the internet of things. In this work, to improve the Q×f values and enhance the temperature stability of Ni0.4Zn0.6TiNb2O8 ceramics, the influence of the substitution of Zr4+ ions at the Ti site in Ni0.4Zn0.6Ti(1-x)ZrxNb2O8 ceramics was investigated. The Q×f value increases from 32114 GHz to 45733 GHz and the τf value changes from 38.1 ppm/°C to 3 ppm/°C with a slight Zr4+ ion substitution (x = 0.1). Meanwhile, the sample with the Zr4+ ion substitution (x = 0.3) that was sintered at 1120 °C shows a very high Q×f value of 92078 GHz. Furthermore, the XRD results reveal that the phase and structure of the Ni0.4Zn0.6Ti(1-x)ZrxNb2O8 ceramics change with the different Zr4+ ion contents. The substitution of the Zr4+ ion can promote the sintering process for the Ni0.4Zn0.6Ti(1-x)ZrxNb2O8 ceramics and restrain the Ni0.5Ti0.5NbO4 phase formation. The results obtained from Ni0.4Zn0.6Ti(1-x)ZrxNb2O8 ceramics can offer useful information for the study and application of high-frequency microwaves. |
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| Keywords: | Microwave dielectric properties Niobate ceramics Ionic substitutions |
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