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Low-temperature sintering and microwave dielectric properties of TiO2-based LTCC materials

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Abstract

Temperature stable high-K LTCC material was prepared. The influence of fabrication process on the crystalline phases, microstructures and microwave dielectric properties of TiO2-Bi2O3-CuO ceramics were investigated. The crystalline phases and microstructures of TiO2-Bi2O3-CuO ceramics were investigated by X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy. It was found that rutile TiO2 phase and Bi2Ti4O11 phase co-existed in the TiO2-Bi2O3-CuO ceramics. Separate TiO2 grains and Bi2Ti4O11 grains distributed uniformly in the ceramic matrix. The composition 0.92TiO2-0.08Bi2Ti4O11 with 2 wt% CuO addition that was sintered at 900 °C for 2 h showed high dielectric constant (εr ~ 81), high quality factor (Q × f ~ 3,500 GHz) and near zero temperature coefficient of resonant frequency (τf ~ −5.1 ppm/°C), meanwhile the compatibility test showed that it could co-fire with silver electrode. The processing-microstructure-property interrelationship was also studied.

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Acknowledgments

This work was supported by the National 973-project of China (2009CB623302), International S&T Cooperation Program of China (2009DFA51820), NSFC projects of China (10979035, 60871044, 50835007).

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Authors and Affiliations

  1. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, Xi’an Jiaotong University, 710049, Xi’an, China

    Li-Xia Pang, Hong Wang, Di Zhou & Xi Yao

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  1. Li-Xia Pang
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  2. Hong Wang
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  3. Di Zhou
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Correspondence to Hong Wang.

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Pang, LX., Wang, H., Zhou, D. et al. Low-temperature sintering and microwave dielectric properties of TiO2-based LTCC materials. J Mater Sci: Mater Electron 21, 1285–1292 (2010). https://doi.org/10.1007/s10854-010-0064-4

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  • DOI: https://doi.org/10.1007/s10854-010-0064-4

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