Synthesis, characterization and dielectric properties of a novel temperature stable (1−x)CoTiNb2O8−xZnNb2O6 ceramic

Journal of Advanced Ceramics, Jun 2019

(1−x)CoTiNb2O8−xZnNb2O6 microwave dielectric ceramics were prepared via the conventional solid-state reaction route with the aim of reducing the τf value and improving the thermal stability. The phase composition and the microstructure were investigated using X-ray diffraction, Raman spectra, and scanning electron microscopy. A set of phase transitions which were induced by composition had been confirmed via the sequence: rutile structure→coexistence of rutile and columbite phase→columbite phase. For (1−x)CoTiNb2O8−xZnNb2O6 microwave dielectric ceramics, the addition of ZnNb2O6 content (x = 0–1) led to the decrease of εr from 62.98 to 23.94. As a result of the high Q × f of ZnNb2O6 ceramics, the increase of ZnNb2O6 content also led to the lower sintering temperatures and the higher Q × f values. The τf value was reduced from +108.04 (x = 0) to − 49.31 ppm/°C (x = 1). Among them, high density 0.5CoTiNb2O8-0.5ZnNb2O6 ceramics were obtained at 1175 °C with excellent microwave dielectric properties of εr 39.2, Q × f 40013 GHz, and τf+3.57 ppm/°C.

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Synthesis, characterization and dielectric properties of a novel temperature stable (1−x)CoTiNb2O8−xZnNb2O6 ceramic

Journal of Advanced Ceramics June 2019, Volume 8, Issue 2, pp 228–237 | Cite as Synthesis, characterization and dielectric properties of a novel temperature stable (1−x)CoTiNb2O8−xZnNb2O6 ceramic AuthorsAuthors and affiliations Mengjuan WuYingchun ZhangMaoqiao Xiang Open Access Research Article First Online: 13 June 2019 35 Downloads Abstract (1−x)CoTiNb2O8−xZnNb2O6 microwave dielectric ceramics were prepared via the conventional solid-state reaction route with the aim of reducing the τf value and improving the thermal stability. The phase composition and the microstructure were investigated using X-ray diffraction, Raman spectra, and scanning electron microscopy. A set of phase transitions which were induced by composition had been confirmed via the sequence: rutile structure→coexistence of rutile and columbite phase→columbite phase. For (1−x)CoTiNb2O8−xZnNb2O6 microwave dielectric ceramics, the addition of ZnNb2O6 content (x = 0–1) led to the decrease of εr from 62.98 to 23.94. As a result of the high Q × f of ZnNb2O6 ceramics, the increase of ZnNb2O6 content also led to the lower sintering temperatures and the higher Q × f values. The τf value was reduced from +108.04 (x = 0) to − 49.31 ppm/°C (x = 1). Among them, high density 0.5CoTiNb2O8-0.5ZnNb2O6 ceramics were obtained at 1175 °C with excellent microwave dielectric properties of εr 39.2, Q × f 40013 GHz, and τf+3.57 ppm/°C. Keywordssolid-state reaction (1−x)CoTiNb2O8−xZnNb2O6 ceramics crystal structure microwave dielectric property  Download to read the full article text Notes Acknowledgements This work has been financially supported by the National Natural Science Foundation of China (No. 51772022). References [1] Wu MJ, Zhang YC, Chen JD, et al. Microwave dielectric properties of sol-gel derived NiZrNb2O8 ceramics. J Alloys Compd 2018, 747: 394–400.CrossRefGoogle Scholar [2] Wu MJ, Chen JD, Zhang YC. Effect of B2O3 addition on the microwave dielectric properties of NiTiNb2O8 ceramics. 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If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecomm-ons.org/licenses/by/4.0/. Authors and Affiliations Mengjuan Wu1Yingchun Zhang1Email authorMaoqiao Xiang21.School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijingChina2.State Key Laboratory of Multiphase Complex Systems, Institute of Process EngineeringChinese Academy of SciencesBeijingChina


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Mengjuan Wu, Yingchun Zhang, Maoqiao Xiang. Synthesis, characterization and dielectric properties of a novel temperature stable (1−x)CoTiNb2O8−xZnNb2O6 ceramic, Journal of Advanced Ceramics, 2019, 228-237, DOI: 10.1007/s40145-018-0308-y