Microwave dielectric properties of (1 − x)SiO2–xTiO2 composite ceramics derived from core–shell structured microspheres
Microwave dielectric properties of (1 − x)SiO2–xTiO2 composite ceramics derived from core–shell structured microspheres
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DOI：
10.1016/j.materresbull.2014.01.016
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发表时间：
2014-05
影响因子：
5.4
通讯作者：
Chengxi Hu;Yuan Liu;Peng Liu;Weiwei Zhang;J. Zhu
中科院分区：
文献类型：
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作者：
Chengxi Hu;Yuan Liu;Peng Liu;Weiwei Zhang;J. Zhu
采用溶剂热溶胶-凝胶法（sol-gel process under solvothermal conditions，SGS）制备了具有核壳结构的（1 −x）SiO2-xTiO 2（0.1 ≤x≤ 0.3）复合粉体，并首次对其微波介电性能进行了研究。在1200 °C下烧结的0.85SiO2- 0.15TiO2陶瓷具有优良的微波介电性能，介电常数ε r ≥ 5.4，Q·f ≥ 40，500 GHz，介电常数τ f接近0 ppm/°C。最佳烧结温度比传统固相法降低了475 °C。
By using a sol–gel process under solvothermal conditions (SGS), the (1 −x)SiO2–xTiO2(0.1 ≤x≤ 0.3) composite powders with a core–shell structure were prepared and its microwave dielectric properties were investigated for the first time. The 0.85SiO2–0.15TiO2ceramics sintered at 1200 °C possess excellent microwave dielectric properties ofɛr∼ 5.4,Q·f∼ 40,500 GHz andτfnear to 0 ppm/°C. The optimum sintering temperature was reduced 475 °C compared to that by a conventional solid-state method.