Zn-Doped Calcium Copper Titanate Synthesized via Rapid Laser Sintering of Sol-Gel Derived Precursors
1
State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
2
Chongqing Institute of East China Normal University, Chongqing 401120, China
3
School of Materials and Environment, Hangzhou Dianzi University, Hangzhou 310018, Zhejiang, China
4
Jinan Institute of Quantum Technology, Jinan 250101, Shandong, China
*
Authors to whom correspondence should be addressed.
Nanomaterials 2020, 10(6), 1163; https://doi.org/10.3390/nano10061163
Received: 12 May 2020 / Revised: 11 June 2020 / Accepted: 12 June 2020 / Published: 13 June 2020
(This article belongs to the Special Issue Laser Synthesis of Nanomaterials)
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 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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Keywords:
permittivity; impedance; sol-gel; laser sintering
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MDPI and ACS Style
Huang, Y.; Qiao, Y.; Li, Y.; He, J.; Zeng, H. Zn-Doped Calcium Copper Titanate Synthesized via Rapid Laser Sintering of Sol-Gel Derived Precursors. Nanomaterials 2020, 10, 1163. https://doi.org/10.3390/nano10061163
AMA Style
Huang Y, Qiao Y, Li Y, He J, Zeng H. Zn-Doped Calcium Copper Titanate Synthesized via Rapid Laser Sintering of Sol-Gel Derived Precursors. Nanomaterials. 2020; 10(6):1163. https://doi.org/10.3390/nano10061163
Chicago/Turabian StyleHuang, Yanwei; Qiao, Yu; Li, Yangyang; He, Jiayang; Zeng, Heping. 2020. "Zn-Doped Calcium Copper Titanate Synthesized via Rapid Laser Sintering of Sol-Gel Derived Precursors" Nanomaterials 10, no. 6: 1163. https://doi.org/10.3390/nano10061163
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