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- W4294192145 abstract "High dielectric loss and poor temperature stability are the current barriers to the application of dielectric materials. In present work, we synthesized a system of acceptor Gd3+ and donor Ta5+ co-doped (Gd0.5Ta0.5)xTi1-xO2 (GTTOx, x = 0, 0.01, 0.02, 0.04, 0.06) ceramics to enhance dielectric response. It was found that a colossal permittivity (CP, 2.65 × 104@1 kHz, 2.37 × 104@1 MHz), a very low dielectric loss (tanδ, [email protected] kHz, [email protected] MHz), good stability of frequency (20–106 Hz) and temperature (RT–250 °C, Δε′ (T)/ε′30 < ± 15%, at 1 kHz) were achieved simultaneously in GTTO0.01 ceramic. Complex impedance spectroscopy, XPS, SEM, and Raman spectroscopy were used to investigate the reasons for the improved dielectric properties. The result indicated that the main reasons for CP and low dielectric loss are the synergistic effect of the electron pinning defect-dipole (EPDD) model, the internal blocking layer capacitance (IBLC) mechanism, and electrode response. This work provides a promising approach for the design of defect-related high-performance giant dielectric ceramics." @default.
- W4294192145 created "2022-09-02" @default.
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- W4294192145 date "2023-01-01" @default.
- W4294192145 modified "2023-09-30" @default.
- W4294192145 title "Thermal stable and ultralow dielectric loss in (Gd0.5Ta0.5) Ti1-O2 giant permittivity ceramics by defect engineering" @default.
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- W4294192145 doi "https://doi.org/10.1016/j.jmat.2022.08.005" @default.
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