Non-Ohmic behavior of copper-rich CCTO thin film prepared through magnetron sputtering method

Xiao, Mi; Meng, Jiao; Lei, Li

doi:10.1007/s10854-019-01255-7

Cited by 6 publications

(2 citation statements)

References 30 publications

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“…There are a lot of methods to minimize the dielectric loss and enhance dielectric performance of CCTO materials. Doping of a metallic element at Ca 2+ or Cu 2+ sites can depress effectively the oxygen vacancies and alleviate the inner stresses to improve the dielectric properties [ 15 , 16 , 17 , 18 ], but the performance of CCTO is much more easily mutable during the synthesis process [ 4 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

“…Various routes to synthesize CCTO have been employed, which include high temperature solid- state sintering, chemical methods, the sol-gel method, co-precipitation, microwave heating, and mechanical mixing methods [ 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. The conventional solid-state sintering reaction is a method welcomed by most researchers for preparation of CCTO using powders of oxides or salts as precursors, however it involves higher reaction temperature with long sintering time, even several days.…”

Section: Introductionmentioning

confidence: 99%

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Zn-Doped Calcium Copper Titanate Synthesized via Rapid Laser Sintering of Sol-Gel Derived Precursors

Huang

Qiao

et al. 2020

Nanomaterials

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Zn-doped calcium copper titanate (CCTO) was successfully synthesized by rapid laser sintering of sol-gel derived precursors without the conventional long-time heat treatment. The structural, morphological, and crystalline properties were characterized, and the performances of dielectrics and impedance were measured and discussed. The X-ray diffractometer results show that Zn-doped CCTO is polycrystalline in a cubic structure, according to the doping ratio of Ca(Cu2Zn)Ti4O12. Electron microscopy showed that Zn-doped CCTO has a denser microstructure with better uniformness with shrunken interplanar spacing of 2.598 nm for the plane (220). Comparing with undoped CCTO, the permittivity almost remains unchanged in the range of 102–106 Hz, demonstrating good stability on frequency. The electrical mechanism was investigated and is discussed through the impedance spectroscopy analysis. The resistance of grain and grain boundary decreases with rising temperature. Activation energies for the grain boundaries for Zn- doped CCTO were calculated from the slope for the relationship of ln σ versus 1/T and were found to be 0.605 eV, smaller than undoped CCTO. This synthesis route may be an efficient and convenient approach to limit excessive waste of resources.

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