Low-temperature sintering and microwave dielectric properties of TiO2-based LTCC materials
Low-temperature sintering and microwave dielectric properties of TiO2-based LTCC materials
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DOI：
10.1007/s10854-010-0064-4
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发表时间：
2010-12-01
影响因子：
2.8
通讯作者：
Yao, Xi
中科院分区：
文献类型：
--
作者：
Pang, Li-Xia;Wang, Hong;Yao, Xi
制备了温度稳定的高K值LTCC材料。研究了制备工艺对TiO 2-Bi 2 O3-CuO系陶瓷的晶相、显微结构和微波介电性能的影响。采用X射线衍射、扫描电镜和能谱分析等方法研究了TiO 7-Bi 2 O3-CuO系陶瓷的晶相和显微结构。结果表明，TiO 2-Bi 2 O3-CuO系陶瓷中存在金红石型TiO 2相和Bi 2 Ti4 O 11相。陶瓷基体中均匀分布着单独的TiO 2和Bi 2 Ti4 O 11颗粒。在900 ℃下烧结2 h的0.92TiO（2）0.08Bi（2）Ti（4）O（11）（添加2wt%CuO）显示出高的介电常数（（r）类似于81），高品质因数（Q x f类似于3,500 GHz）和谐振频率的接近零的温度系数（tau（f）类似于-5.1 ppm/℃），同时相容性试验表明，它能与银电极共烧。研究了工艺-组织-性能的相互关系。
Temperature stable high-K LTCC material was prepared. The influence of fabrication process on the crystalline phases, microstructures and microwave dielectric properties of TiO2-Bi2O3-CuO ceramics were investigated. The crystalline phases and microstructures of TiO7-Bi-2 O-3-CuO ceramics were investigated by X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy. It was found that rutile TiO2 phase and Bi2Ti4O11 phase co-existed in the TiO2-Bi2O3-CuO ceramics. Separate TiO2 grains and Bi2Ti4O11 grains distributed uniformly in the ceramic matrix. The composition 0.92TiO(2)0.08Bi(2)Ti(4)O(11) with 2 wt% CuO addition that was sintered at 900 degrees C for 2 h showed high dielectric constant (epsilon(r) similar to 81), high quality factor (Q x f similar to 3,500 GHz) and near zero temperature coefficient of resonant frequency (tau(f) similar to -5.1 ppm/degrees C), meanwhile the compatibility test showed that it could co-fire with silver electrode. The processing-microstructure-property interrelationship was also studied.