Sintering Behavior and Dielectric Properties of Ultra‐Low Temperature Fired Silver Molybdate Ceramics
Sintering Behavior and Dielectric Properties of Ultra‐Low Temperature Fired Silver Molybdate Ceramics
复制标题
DOI：
10.1111/jace.13159
复制
发表时间：
2014-11
影响因子：
3.9
通讯作者：
Di Zhou;Wen-Bo Li;L. Pang;Jing Guo;Z. Qi;T. Shao;Zhenxing Yue;X. Yao
中科院分区：
文献类型：
--
作者：
Di Zhou;Wen-Bo Li;L. Pang;Jing Guo;Z. Qi;T. Shao;Zhenxing Yue;X. Yao
采用固相反应法制备了Ag 2 MoO 4陶瓷，在450°C烧结2 h，其相对介电常数为8.08，Qf值为17000 GHz，谐振频率温度系数约为-133ppm/°C。Ag 2 MoO 4陶瓷与银化学相容，但在烧结过程中与铝发生严重反应生成（Ag0.5Al0.5）MoO 4。采用红外光谱拟合和香农加法规则研究了陶瓷在微波区的本征介电行为。在微波区，离子位移极化和电子极化对陶瓷介电常数的贡献几乎相等。Ag_2MoO_4陶瓷是一种很好的超低温共烧微波器件候选材料。
Ag2MoO4 ceramic was prepared by using the solid-state reaction method, which could be sintered at 450°C for 2 h, having a relative permittivity of 8.08, a Qf value of 17 000 GHz, and a temperature coefficient of resonance frequency about – 133 ppm/°C. Ag2MoO4 ceramic was chemically compatible with silver but reacted seriously with aluminum to form (Ag0.5Al0.5)MoO4 during the sintering. The fitting of infrared spectra and the Shannon’s additive rule were employed to study intrinsic dielectric behaviors of the ceramics at microwave region. Ionic displacive polarization and the electronic polarization contributed almost equally to the dielectric permittivity of the ceramic at microwave region. The Ag2MoO4 ceramics could be a good candidate for ultra-low temperature co-fired microwave devices.