Article ID Journal Published Year Pages File Type
7897952 Journal of the European Ceramic Society 2018 26 Pages PDF
Abstract
Dielectrics with low capacitance loss and high relative permittivity are of high demand in metal-insulator-metal (MIM) capacitor that offers higher level of miniaturization, flexibility and performance. In order to achieve high relative permittivity, developing ceramics with metallic inclusions, has been suggested as a working strategy. But such materials may have high leakage currents and often lack thermal stability. With the objective for MIM applications, a series of (1-x)La(Co0.5Ti0.5)O3-δ-x(La0.5Sr0.5)CoO3-δ ceramics [x = 0.0, 0.02, 0.04, 0.06, 0.08, 0.1, 0.2, 0.3, 0.4, 0.5, 1] were developed. The crystal structure analysis was performed for La(Co0.5Ti0.5)O3-δ, (La0.5Sr0.5)CoO3-δ and 0.5La(Co0.5Ti0.5)O3-δ-0.5(La0.5Sr0.5)CoO3-δ using X-pert High Score Plus. The composite with x = 0.5 in (1-x)La(Co0.5Ti0.5)O3-δ-x(La0.5Sr0.5)CoO3-δ showed a maximum relative permittivity of 4920 with promising ac electrical resistivity (∼202 Ω-cm). The thermal, electrical and dielectric properties together suggest that the composition 0.5La(Co0.5Ti0.5)O3-δ-0.5(La0.5Sr0.5)CoO3-δ is suitable for MIM capacitors in DRAM and RF devices.
Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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