Effect of Zn filler for percolative BaTiO3/Zn composite films fabricated by aerosol deposition

Lee, Jeong Hyun; Kim, Hongki; Lee, Seung Hwan; Choi, Kyoung-Seong; Lee, Young-Hie

doi:10.1016/j.ceramint.2015.06.034

Cited by 8 publications

(1 citation statement)

References 16 publications

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“…The enhancement of ε r ' for ceramic-metal composites at the percolation threshold is typically for a factor of a few tens. However, the tan(δ), also referred to as dielectric losses, also tends to increase by a similar amount [16][17][18]. For example, for BaTiO 3 /(Ni 0.3 Zn 0.7 )Fe 2.1 O 4 composites, both the ε r ' and dielectric losses, tan(δ), were reported to have increased by a factor of 10 [19].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Structural and Electrical Properties of Al2O3/Al Composites Prepared by Aerosol Co-Deposition

et al. 2023

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As the microelectronic industry develops, components that can perform several different tasks receive increasingly more attention, resulting in multifunctional materials being highly sought after. Al2O3 is widely present in electronic applications as a protective coating or as an electrical and thermal insulator due to its mechanical and thermal stabilities and chemical inertness. Al2O3 is also an important dielectric material, with high resistivity and stable permittivity over a wide range of temperatures and electric fields, but its modest permittivity necessitates large effective areas or extremely thin layers when a large capacitance is desired. Composites consisting of discrete conducting phases within an insulating matrix can produce large capacitance via Maxwell–Wagner polarization. In this work, Al2O3/Al composite thick films with different volume ratios of Al were prepared using the aerosol deposition method. A relative dielectric permittivity (εr′) of 800 at 1 MHz was achieved at 27 vol% of Al, a sixty-sevenfold enhancement compared to Al2O3. On the other hand, dielectric losses, tan(δ), at 1 MHz increased from 0.01 for Al2O3 up to 0.58 for the composite with 27 vol% of Al. A finite-element model of the composites was implemented, supporting the nonlinear electrical behavior of the composites as function of vol% of Al. Our results show novel possibilities for the applications of Al2O3-based materials in the microelectronic industry, especially for temperature-sensitive applications, for which the integration strengths of aerosol deposition are valuable.

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