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Use of LiF to Achieve a Low-Temperature Co-Fired Ceramics (LTCC) with Low Dielectric Loss

DOI

Abstract

The effects of LiF doping on the sintering temperature and microwave dielectric properties of Mg4Nb2O9 (MN) ceramics have been investigated by using a field emission scanning electron microscopy (FE-SEM), X-ray powder diffraction (XRPD), and network analyzer. It was found that the addition of LiF (1.0-10 wt%) to MN is effective in reducing the sintering temperature. The microwave dielectric properties of MN-3.0 wt% LiF sintered at 850°C for 10 h have the dielectric constant (εr) of 12.6, the quality factor (Q•f) of 103607 GHz and the temperature coefficient of resonant frequency (τf) of -70.5 ppm/°C. The bulk densities of MN with 3.0 wt% LiF were noticeably improved at the sintering temperature of around 850°C; the value was 4.186 g/cm3 which was nearly equal to that of MN without LiF sintered at 1350°C. As for the chemical compatibility of MN-3.0 wt% LiF with Ag, the XRPD of the mixtures of MN-3.0 wt% LiF and Ag heat-treated at 920°C for 10 h did not show the evidence of the secondary phase. Thus, it was considered that the MN-xwt% LiF ceramics are applicable to the multilayer devices with silver as a electrode.

Journal

Details

  • CRID
    1390001205523914624
  • NII Article ID
    130004610151
  • DOI
    10.14852/jcersjsuppl.112.0.s1633.0
  • ISSN
    13492756
  • Text Lang
    en
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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