Nano conductive particle dispersed percolative thin film ceramics with high permittivity and high tunability

Nano conductive particle dispersed percolative thin film ceramics with high permittivity and high tunability
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具有高介电常数和高可调性的纳米导电颗粒分散渗流薄膜陶瓷

DOI:
10.1063/1.3699012
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发表时间:
2012-03
影响因子:
4
通讯作者:
Du, Piyi
Du, Piyi
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Han, Gaorong;Weng, Wenjian;Ma, Ning;Du, Piyi

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采用柠檬酸和乙酰丙酮双络合剂控制溶胶路线,在空气中加热,不使用还原气氛,制备了导电银纳米颗粒分散的Pb0.4Sr0.6TiO3 (PST)薄膜。当纳米颗粒分数接近阈值时,就会发生渗透行为。在阈值附近加入银纳米粒子的渗滤复合薄膜的介电常数比未加入银纳米粒子的薄膜高4倍。在电场中加入银纳米粒子后,PST薄膜的可调性提高了42%。
Conductive Ag nanoparticles dispersed Pb0.4Sr0.6TiO3 (PST) thin film was obtained by dual complexing agents of citric acid and acetylacetone controlled sol route heated in air without using reduction atmosphere. Percolation behaviour occurs with the nano-particle fraction adjacent to a threshold. Dielectric constant of the percolative composite thin film with Ag nanoparticles near the threshold is 4 times higher than that of the one without Ag nanoparticles. Tunability of the PST thin film increases dramatically by 42% with inner electric field by Ag nanoparticles inside.
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