Structure and characterization of B2O3 modified yNd(Mg1/2Ti1/2)O3-(1-y) Ca0.8Sr0.2TiO3 ceramics with a near-zero temperature coefficient at microwave frequency
Structure and characterization of B2O3 modified yNd(Mg1/2Ti1/2)O3-(1-y) Ca0.8Sr0.2TiO3 ceramics with a near-zero temperature coefficient at microwave frequency
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DOI：
10.1016/j.ceramint.2016.11.023
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发表时间：
2017-02-01
影响因子：
5.2
通讯作者：
Chen, Yuan-Bin
中科院分区：
文献类型：
--
作者：
Lin, Shih-Hung;Chen, Yuan-Bin
研究了采用传统固相法制备的添加1wt%B2O3的yNd（Mg 1/2 Ti 1/2）O3-（1-y）Ca 0. 8 Sr 0. 2 TiO 3系陶瓷的显微结构和微波介电性能。微波测量表明，随着Nd（Mg 1/2 Ti 1/2）O3-含量的减少，介电常数（r）和谐振频率温度系数（τ（f））增加，品质因数（Qxf）降低。在1375 ℃下烧结的0.7Nd（Mg 1/2 Ti 1/2）O3 -0.3Ca（0.8）Sr（0.2）TiO（3）陶瓷的1wt%B2O3添加显示出39的τ（r）、27000的Qxf值（在8 GHz下）和接近零的τ（f）-（类似于-0.4ppm/℃）。随着Nd（Mg 1/2 Ti 1/2）O-3含量增加至y=0.9，在1375 ℃烧结温度下可以观察到最高Qxf值35，000（GHz）。
The microstructure and microwave dielectric properties of the yNd(Mg1/2Ti1/2)O-3-(1-y)Ca0.8Sr0.2TiO3 ceramics system with B2O3 addition (1 wt%) prepared using the conventional solid-state route were studied. Microwave measurements show an increase in the dielectric constant (epsilon(r)) and temperature coefficient of the resonant frequency (tau(f)) and a decrease in the quality factor (Qxf) with decreasing Nd(Mg1/2Ti1/2)O-3 content. The 1 wt% B2O3 addition for 0.7Nd(Mg1/2Ti1/2)O-3-0.3Ca(0.8)Sr(0.2)TiO(3) ceramics sintered at 1375 degrees C show epsilon(r) of 39, a Qxf value of 27000 (at 8 GHz), and a near-zero tau(f)-(similar to -0.4 ppm/degrees C). As the content of Nd(Mg1/2Ti1/2)O-3 increases to y=0.9, the highest Qxf value of 35,000 (GHz) can be observed under 1375 degrees C sintered temperature.