Bi1/2Na1/2TiO3–BaTiO3 based thick-film capacitors for high-temperature applications

Bi1/2Na1/2TiO3–BaTiO3 based thick-film capacitors for high-temperature applications
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适用于高温应用的 Bi1/2Na1/2TiO3–BaTiO3 基厚膜电容器

DOI:
10.1016/j.jeurceramsoc.2013.07.020
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发表时间:
2014
影响因子:
5.7
通讯作者:
Rödel, Jürgen
Rödel, Jürgen
中科院分区:
材料科学1区
文献类型:
--
作者:
Zang, Jiadong;Jo, Wook;Zhang, Haibo;Rödel, Jürgen

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制备了组分为(1-x)(0.94Bi_(1/2)Na_(1/2)TiO_3 - 0.06BaTiO_3)-x(K_(0.5)Na_(0.5)NbO_3)(x= 0,0.03,0.09和0.18)的厚膜,并研究了它们的结构和电学性能。介电性能表明,这些薄膜非常适合高温应用,因为它们在大的温度范围内的介电常数变化很小(<15%)。x = 0.18的厚膜提供了从室温到350 °C的工作温度范围。x = 0.03和0.09的薄膜在400 °C下也具有稳定的介电常数。介电常数的热稳定性的改善归因于K0.5Na0.5NbO3的加入导致材料中的长程有序被打破。然而,材料的极化率被发现可能是由于衬底的钳位效应而降低。每种膜的特性进行了讨论的基础上的介电和电气性能。
Thick films with compositions (1 −x)(0.94Bi1/2Na1/2TiO3–0.06BaTiO3)–x(K0.5Na0.5NbO3) (x= 0, 0.03, 0.09 and 0.18) have been prepared and their structural and electrical properties have been investigated. Dielectric properties show that these films are well suited for high-temperature applications due to their low variance in permittivity (<15%) over large temperature ranges. The thick film withx= 0.18 offers an operational temperature range from room temperature to 350 °C. Films withx= 0.03 and 0.09 also possess a stabile permittivity up to 400 °C. The improvement in the thermal stability of the permittivity is attributed to the addition of K0.5Na0.5NbO3which leads to breaking of the long-range order in the materials. However, the polarizability of the materials was found to decrease possibly due to the clamping effect of the substrate. The characteristics of each film are discussed based on dielectric and electrical properties.
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