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Synthesis and characterization of complex pervoskite BMT ceramics and the effect of gamma radiation at microwave frequency

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Abstract

Ba(Mg1/3,Ta2/3)O3 (BMT), a complex perovskite ceramic with extremely high Qu and that has been the only choice as dielectric resonator (DR) for satellite multiplexers extensively used in communication satellites. BMT DRs have been prepared by solid-state route by single-step calcinations followed by firing the green compacts at about 1600–1650 °C for 20 h. Excellent Qu-factor > 20,000 at 10 GHz achieved after annealing near 1000 °C combined with near-zero τf and dielectric constant (εr) ~ 24. The DRs are subjected to 100 kRad and 1MRad γ irradiation exposure. The resonant frequency and Qu are measured after the irradiation and found to be within the range of measurement error. This paper briefly discusses the BMT processing, characterization, the properties and the effects of γ-radiation. These BMT DRs are useful for Satellite applications. The ten-pole filters have been assembled and its performance tested and verified.

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Acknowledgements

We gratefully acknowledge Director, VSSC for moral support and permitting this work to publish. The great guidance, encouragement and support given by Shri Roy M. Cherian, AD, VSSC, Dr. S. C. Sharma, AD (R&D), Shri M. Mohan, DD VSSC (MME) and Dr. Bhanu Pant, GD/MMG are acknowledged. Authors are thankful to Dr. Ratheesh, Director CMET (H) for elaborate technical discussions. Also, authors gratefully acknowledge colleagues of GEM for all supports.

Funding

This research work is financially supported by Department of Space (DoS/ISRO), India.

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Authors and Affiliations

  1. Vikram Sarabhai Space Centre, Thiruvananthapuram, Kerala, 695022, India

    K. Ashok, B. Masin & H. Sreemoolanadhan

  2. Space Applications Centre, Ahmedabad, Gujarat, 380015, India

    Nishant Shukla, Vikas Gupta & Praveen Kumar Ambati

  3. U.R.Rao Satellite Centre, Bangalore, Karnataka, 560017, India

    Kinshuk Gupta

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  1. K. Ashok
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  2. B. Masin
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Correspondence to K. Ashok.

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Ashok, K., Masin, B., Shukla, N. et al. Synthesis and characterization of complex pervoskite BMT ceramics and the effect of gamma radiation at microwave frequency. J. Korean Ceram. Soc. 59, 44–50 (2022). https://doi.org/10.1007/s43207-021-00156-y

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  • DOI: https://doi.org/10.1007/s43207-021-00156-y

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