Low-losses, highly tunable Ba0.6Sr0.4TiO3∕MgO composite
Low-losses, highly tunable Ba0.6Sr0.4TiO3∕MgO composite
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DOI：
10.1063/1.2837621
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发表时间：
2008-01
影响因子：
4
通讯作者：
U. Chung;C. Elissalde;M. Maglione;C. Estournès;M. Pate;J. Ganne
中科院分区：
文献类型：
--
作者：
U. Chung;C. Elissalde;M. Maglione;C. Estournès;M. Pate;J. Ganne
放电等离子烧结（SPS）是获得高致密、界面清洁、性能可调的铁电-介电陶瓷复合材料的有效手段。介电MgO和铁电Ba_（0.6）Sr_（0.4）TiO_3（BST）在二维多层和三维随机粉末设计中结合。它们的未修改的BST居里温度证明了互扩散的抑制，而介电损耗低于0.5%，室温下的可调谐性为40%。通过对复合材料和纯BST的介电性能进行可靠的比较，得到了密度相近（>95%）的复合材料和纯BST。这种SPS陶瓷可以用作模拟的实验输入，并且是高频应用的潜在候选者。
Spark plasma sintering (SPS) is an efficient tool to obtain highly densified ferroelectric-dielectric ceramic composites with clean interfaces and tunable properties. Dielectric MgO and ferroelectric Ba0.6Sr0.4TiO3 (BST) were combined in two-dimensional multilayer and three-dimensional random powders design. Their unmodified BST Curie temperature proves the suppression of interdiffusion while dielectric losses are below 0.5% and the tunability is 40% at room temperature. The composites and pure BST with similar densities (>95%) were obtained, owing reliable comparison of their dielectric properties. Such SPS ceramics can be used as experimental input for simulation and are potential candidates for high frequency applications.