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- W3142398955 abstract "Columbite-rich multiphase TiO2 nanoceramics with outstanding mechanical and dielectric properties were successfully prepared through high-pressure sintering by using anatase-type TiO2 as precursor. High-pressure sintering combined with phase transformation assisted consolidation can effectively refine the grain size of the recovered samples. This process is conducive to obtain nanocrystalline columbite-rich TiO2 ceramics with excellent performance. The highest hardness is approximately 12.76 GPa, which is 2.5 times higher than that of ordinary coarse-grained ceramics. The effect of columbite phase on the hardness of multiphase ceramics is discussed. The columbite-rich TiO2 ceramic shows a colossal permittivity (∼8 × 103) and low loss (∼0.2) at 1 kHz and room temperature, which are superior to that of undoped rutile polycrystalline ceramics. This ceramic shows a steadier frequency-dependent dielectric permittivity and loss than rutile TiO2 crystal. These results enrich the fundamental knowledge of columbite-rich TiO2, thereby enabling the exploitation of new applications." @default.
- W3142398955 created "2021-04-13" @default.
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- W3142398955 date "2021-08-01" @default.
- W3142398955 modified "2023-09-29" @default.
- W3142398955 title "Columbite-rich multiphase TiO2 nanoceramic with superior mechanical and dielectric properties" @default.
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- W3142398955 doi "https://doi.org/10.1016/j.jeurceramsoc.2021.03.048" @default.
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