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Microwave Dielectric Properties and Low-Temperature Cofiring of BaTe4O9 with Aluminum Metal Electrode

Authors

  • Do-Kyun Kwon,

    Corresponding author
    1. Center for Dielectric Studies, Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802
      †Author to whom correspondence should be addressed. e-mail: dxk917@psu.edu
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    • *Member, American Ceramic Society.

  • Michael T. Lanagan,

    1. Center for Dielectric Studies, Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802
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    • *Member, American Ceramic Society.

  • Thomas R. Shrout

    1. Center for Dielectric Studies, Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802
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    • *Member, American Ceramic Society.


  • D. Johnson—contributing editor

  • This work was supported by the National Science Foundation, as part of the Center for Dielectric Studies under Grant No. 0120812.

†Author to whom correspondence should be addressed. e-mail: dxk917@psu.edu

Abstract

Polycrystalline BaTe4O9 ceramic compound was investigated as a promising microwave dielectric compound for low-temperature cofired ceramics (LTCC) applications. The binary phase BaTe4O9 was synthesized and subsequently densified over the temperature range of only 500°–550°C, which allows for low-temperature cofiring with aluminum metal. The dielectric properties of BaTe4O9 ceramics sintered at 550°C for 2 h were determined in the microwave region of 12–14 GHz. The dielectric constant and Q×f product obtained were 17.5 and 54 700 GHz at 12 GHz, respectively. The temperature coefficient of resonance frequency showed a negative value of −90 ppm/°C. In terms of its evaluation for LTCC, the BaTe4O9 composition was found to be chemically compatible and successfully cofired with highly conductive aluminum electrode, while maintaining good electrical performance.

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