Effect of Acceptor and Donor Dopants on the Dielectric and Tunable Properties of Barium Strontium Titanate
Effect of Acceptor and Donor Dopants on the Dielectric and Tunable Properties of Barium Strontium Titanate
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DOI：
10.1111/j.1151-2916.2004.tb07494.x
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发表时间：
2004-12
影响因子：
3.9
通讯作者：
Xiaofeng Liang;Z. Meng;Wenbiao Wu
中科院分区：
文献类型：
--
作者：
Xiaofeng Liang;Z. Meng;Wenbiao Wu
研究了Mn2+、Mg2+、Al3+、Fe3+、La3+、Nb5+等离子掺杂对Ba0.6Sr0.4TiO3陶瓷介电性能和调谐性能的影响。结果表明，少量的受主离子如Mg2+、Fe3+、Al3+的掺杂可以明显改善材料的介电性能。介电损耗的降低归因于受主取代引起的补偿缺陷的形成。结果表明，介电常数和晶粒尺寸都与可调谐性有关。与Ti相比，通过用较小的Al和Fe离子掺杂陶瓷获得了更高的品质因数。
The effects of different concentrations of Mn 2+ , Mg 2+ , Al 3+ , Fe 3+ , La 3+ , and Nb 5+ on the dielectric and tunable properties of Ba 0.6 Sr 0.4 TiO 3 ceramics were investigated. It was found that doping in small amounts with acceptor ions such as Mg 2+ , Fe 3+ , and Al 3+ could meliorate the dielectric properties clearly. Decrease of dielectric loss was attributed to the formation of compensating defects originating from acceptor substitution. It was concluded that the tunability was linked to both the dielectric constant and the grain size. A higher figure of merit was obtained by doping the ceramics with smaller ions of Al and Fe, compared to Ti.