首页|Novel series of high-Q oxyfluoride microwave dielectric ceramics for LTCC applications

Novel series of high-Q oxyfluoride microwave dielectric ceramics for LTCC applications

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Three pure phases Li4NbO4F, Li4MgNbO5F and Li6.5MgTiNbO8F1.5 oxyfluorides were successfully prepared using the way of solid-state reaction method at 650 °C, 600 °C and 725 °C, respectively. According to the XRD data and Rietveld refinement results, these three types of ceramics crystallized in a cubic rock salt structure with space group [Fm-3 m(225)]. The grain sizes, theoretical εtheo and packing fraction were calculated to help with the evaluation of these three ceramics. The oxyfluoride ceramics Li4NbO4F, Li4MgNbO5F and Li6.5MgTiNbO8F1.5 sintered at 875 °C, 900 °C and 900 °C exhibited outstanding microwave dielectric properties: εr = 16.8, 16.4 and 17.3, Q × f = 76,200, 97,300 GHz and 92,600, and τf = ?48.6, ? 40.5 and ? 41.3 ppm/°C, respectively. The compatibility with Ag powders shows that the Li4NbO4F, Li4MgNbO5F and Li6.5MgTiNbO8F1.5 ceramics are potential candidates for low temperature co-fired ceramic technology.

High QLTCC applicationsMicrowave dielectric propertiesOxyfluoride

Zhai S.、Liu P.、Zhang S.、You J.、Yao G.

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School of Physics and Information Technology Shaanxi Normal University

School of Science Xi'an University of Posts and Telecommunications

2022

Journal of Alloys and Compounds

Journal of Alloys and Compounds

EISCI
ISSN:0925-8388
年,卷(期):2022.899
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