Extremely High Tunability of Low Dielectric Constant 1‐3 Type (Ba,Sr)TiO3/Resin Epoxy
Extremely High Tunability of Low Dielectric Constant 1‐3 Type (Ba,Sr)TiO3/Resin Epoxy
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DOI：
10.1111/j.1551-2916.2012.05264.x
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发表时间：
2012-07
影响因子：
3.9
通讯作者：
R. Liang;W. Liao;Junwei Wu;F. Cao;Xianlin Dong
中科院分区：
文献类型：
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作者：
R. Liang;W. Liao;Junwei Wu;F. Cao;Xianlin Dong
采用分块填充法制备了1-3型（Ba，Sr）TiO 3（BST）/环氧树脂复合材料。研究了柱状复合材料的微观结构、介电性能和调谐性能。1-3型复合材料的一个重要特征是直流电场被有效地施加到高介电常数的铁电相。随着环氧树脂含量的增加，复合材料的可调谐性基本保持不变，但介电常数却大幅下降。介电非线性系数β随环氧树脂体积的增加而急剧增大，当环氧树脂体积为90%时，β可达2.8 × 1012。这些性能使得1-3型复合材料非常有希望用于潜在的可调谐器件应用。
A 1-3 type (Ba,Sr)TiO3 (BST)/resin epoxy composites were prepared by dice and fill technique. The microstructure, dielectric, and tunable properties of columnar composites were investigated. An important feature of 1-3 type composites is that the dc field is efficiently applied to the high-permittivity ferroelectric phase. With the increase of resin epoxy content, the tunability of the composite remains nearly unchanged while the permittivity decreases much. The coefficient of dielectric nonlinearity β increases sharply with the increase of resin epoxy volume and β increases up to 2.8 × 1012 when the resin epoxy volume is 90%. These properties make 1-3 type composites very promising for potential tunable device applications.