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Microwave dielectric properties of low-temperature-fired MgNb2O6 ceramics for LTCC applications

机译：用于LTCC应用的低温烧制MgNB2O6陶瓷的微波介电性能

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摘要

MgNb _(2) O _(6) ceramics doped with (Li _(2) O–MgO–ZnO–B _(2) O _(3) –SiO _(2) ) glass were synthesized by the traditional solid phase reaction route. The effects of LMZBS addition on microwave dielectric properties, grain growth, phase composition and morphology of MgNb _(2) O _(6) ceramics were studied. The SEM results show dense and homogeneous microstructure with grain size of 1.72 μm. Raman spectra and XRD patterns indicate the pure phase MgNb _(2) O _(6) ceramic. The experimental results show that LMZBS glass can markedly decrease the sintering temperature from 1300 °C to 925 °C. Higher density and lower porosity make ceramics have better dielectric properties. The MgNb _(2) O _(6) ceramic doped with 1 wt% LMZBS glass sintered at 925 °C for 5 h, possessed excellent dielectric properties: ε _(r) = 19.7, Q· f = 67?839 GHz, τ _(f) = ?41.01 ppm °C ~(?1) . Moreover, the favorable chemical compatibility of the MgNb _(2) O _(6) ceramic with silver electrodes makes it as promising material for low temperature co-fired ceramic (LTCC) applications.
机译：用传统的固相合成掺杂有（Li _（2）O-MgO-ZnO-B_（2）O _（3）-SiO _（2））玻璃的MgNB _（2）O _（6）陶瓷反应途径。研究了LMZBS对MGNB _（2）O _（6）陶瓷的微波介电性能，晶粒生长，相组成和形态的影响。 SEM结果显示致密且均匀的微观结构，晶粒尺寸为1.72μm。拉曼光谱和XRD图案表示纯相MGNB _（2）O _（6）陶瓷。实验结果表明，LMZBS玻璃可以显着降低1300℃至925℃的烧结温度。更高的密度和更低的孔隙率使陶瓷具有更好的介电性能。 MGNB _（2）O _（6）陶瓷掺杂有1wt％LMZBS玻璃烧结在925℃的5小时，具有优异的电介质特性：ε_（r）= 19.7，q·f = 67？839 GHz， τ_（f）=？41.01 ppm°C〜（？1）。此外，与银电极的MgNB _（2）O _（6）陶瓷的有利化学相容性使其成为低温共烧陶瓷（LTCC）应用的有希望的材料。

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