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High dielectric constant and high‐Q in microwave ceramics of SrTiO3 co‐doped with aluminum and niobium
Journal of the American Ceramic Society ( IF 3.5 ) Pub Date : 2018-01-15 , DOI: 10.1111/jace.15413
Siliang Chen 1 , Lingxia Li 1 , Shihui Yu 1 , Haoran Zheng 1 , Zheng Sun 1
Affiliation  

Al/Nb co‐doped SrTiO3 microwave ceramics with the composition of SrTi1–x(Al0.5Nb0.5)xO3 (x = 0.03, 0.05, 0.1, and 0.15) have been synthesized via a standard solid‐state reaction method. The substitution of (Al0.5Nb0.5)4+ in B‐site inhibits the reduction in Ti4+ ions and the growth of grain size, then the transport of mobile charge carriers is limited, and thus the Q value is improved. For the SrTi0.9(Al0.5Nb0.5)0.1O3 ceramics, in addition to their high dielectric constant (εr ~185), they exhibit correspondingly a high Qf value (~ 9077 GHz) at 2.9 GHz, making the microwave ceramics suitable for myriad device miniaturization and high‐performance wireless communication.

中文翻译:

铝和铌共掺杂的SrTiO3微波陶瓷的高介电常数和高Q

通过标准固态反应方法合成了具有SrTi 1– x(Al 0.5 Nb 0.5x O 3x = 0.03、0.05、0.1和0.15)组成的Al / Nb共掺杂SrTiO 3微波陶瓷。。B位中(Al 0.5 Nb 0.54+的取代抑制了Ti 4+离子的减少和晶粒尺寸的增长,从而限制了移动载流子的传输,从而提高了Q值。对于SrTi 0.9(Al 0.5 Nb 0.50.1 O 3陶瓷,除了它们的高介电常数(ε - [R〜185),将它们在2.9 GHz的呈现相应较高的QF值(〜9077千兆赫),使得微波陶瓷适合于无数的设备小型化和高性能的无线通信。
更新日期:2018-01-15
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