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Sintering characteristics and microwave dielectric properties of Ba(Co1/3Nb2/3)O3–MnO2 ceramics

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Abstract

Microwave dielectric ceramics with the composition of Ba(Co1/3Nb2/3)O3–MnO2 (BCN–MnO2) were prepared by the solid-state reaction method. The effects of MnO2 on phase composition, microstructure, sintering characteristics and microwave dielectric properties of BCN ceramics were investigated. The additive MnO2 slightly decreased the sintering temperature and improved the densification of BCN as sintering aids. The multivalent Mn was beneficial for maintaining the compositional stability of BCN, which broadened the region of the sintering temperature. The Q × f value and temperature coefficient of resonant frequency (τ f ) were improved by 0.3 wt% MnO2. BCN–0.3 wt% MnO2 ceramic sintered at 1,340 °C for 12 h in air exhibited good microwave dielectric properties with ε r  = 32.9, Q × f = 90,431 GHz, τ f  = −12 ppm/°C.

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Acknowledgments

This work was supported by Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), the Scientific Innovation Research of College Graduate in Jiangsu province (Project No. CXLX13_403), the Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure (Project No. SKL201309SIC) and Science and Technology Projects of Guangdong Province (Project No. 2011A091103002). College Industrialization Project of Jiangsu Province (JHB2012-12).

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Authors and Affiliations

  1. College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, China

    Zhefei Wang, Baoyu Huang, Lixi Wang & Qitu Zhang

  2. Guangdong Fenghua Advanced Technology Company Limited, Zhaoqing, 526020, Guangdong, China

    Zhenxiao Fu

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  1. Zhefei Wang
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  2. Baoyu Huang
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  3. Lixi Wang
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Correspondence to Qitu Zhang.

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Wang, Z., Huang, B., Wang, L. et al. Sintering characteristics and microwave dielectric properties of Ba(Co1/3Nb2/3)O3–MnO2 ceramics. J Mater Sci: Mater Electron 26, 1107–1112 (2015). https://doi.org/10.1007/s10854-014-2512-z

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