Structural, optical and dielectric study of Cu doped ZnO nanoparticles synthesised by high energy ball milling

In the present work, Ni doped ZnO nanoparticles (Zn1−xNixO, x = 0,0.01) has been synthesized by High Energy Ball Milling technique. The synthesized nanoparticles have been characterized by XRD, UV-Vis spectroscopy and LCR meter. The XRD studies revealed that the synthesized nanoparticles are single phase, hexagonal wurtize structure and belongs to a space group of P63 mc. There is shifting of most intense XRD peaks toward higher diffraction angle with Ni doping. The lattice parameter and average crystallite size decreases with Ni doping. Doping of Ni reduces the band gap of ZnO. This is attributed to the sp-d exchange interaction between the ZnO band electrons and localized d electrons of Ni2+ ions. The ac conductivity increases with increase in temperature and frequency, but the value decreases with Ni doping.

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Optical and dielectric study of strontium modified barium zirconium titanate ceramic prepared by high energy ball milling

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2015.05.005 ◽

2015 ◽

Vol 645 ◽

pp. 586-596 ◽

Cited By ~ 33

Author(s):

T. Badapanda ◽

S. Sarangi ◽

B. Behera ◽

S. Parida ◽

S. Saha ◽

...

Keyword(s):

Ball Milling ◽

High Energy ◽

High Energy Ball Milling ◽

Dielectric Study ◽

Zirconium Titanate ◽

Energy Ball ◽

Barium Zirconium Titanate ◽

Titanate Ceramic

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Microstructure and Electrical Properties of Er2O3-Doped ZnO-Based Varistor Ceramics Prepared by High-Energy Ball Milling

Journal of Rare Earths ◽

10.1016/s1002-0721(07)60057-x ◽

2007 ◽

Vol 25 (1) ◽

pp. 120-123 ◽

Cited By ~ 23

Author(s):

Liu Hongyu ◽

Kong Hui ◽

Jiang Dongmei ◽

Shi Wangzhou ◽

Ma Xueming

Keyword(s):

Electrical Properties ◽

Ball Milling ◽

High Energy ◽

High Energy Ball Milling ◽

Energy Ball ◽

Doped Zno

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Structural and Electrical Properties of Zn1-xCrxO NTCR Nanoceramics Synthesized by High Energy Ball Milling

10.21203/rs.3.rs-221973/v1 ◽

2021 ◽

Author(s):

Bikram Keshari Das ◽

Tanushree Das ◽

Kajal Parashar ◽

S.K.S Parashar ◽

Rajeev Kumar ◽

...

Keyword(s):

Particle Size ◽

Electrical Properties ◽

Ball Milling ◽

Structural Parameters ◽

High Energy ◽

High Energy Ball Milling ◽

High Frequency Region ◽

Structural And Electrical Properties ◽

Energy Ball ◽

Doped Zno

Abstract Cr doped ZnO (x = 0-0.04) nanoceramics was successfully synthesized by high energy ball milling (HEBM) technique. The structural and electrical properties of the synthesized sample has been studied in detail. The doping of Cr into ZnO has been verified by X-ray diffraction (XRD) and also from the variation in structural parameters. Rietveld refinement XRD pattern of calcined sample showed the hexagonal wurtzite structure and it did not induce impurity phases. From the XRD, it has been confirm that maximum result confirms that up to 4 atomic% of Cr can be doped into ZnO. The strain of the sample reduced with increase in particle size. After sintering, there is a growth of particle size of Cr doped ZnO sample. The impedance spectroscopy data shows a single semicircle in the high frequency region corresponding to the bulk properties of the nanoceramic sample. The decrease in real part of the impedance with temperature suggests the NTCR behavior of the sample in the temperature range of 300-500 ºC. The temperature dependent relaxation phenomena are also observed for the synthesized ceramic sample at high temperature. Distributed relaxation time suggests that the relaxation in the synthesized samples is of non-Debye type. The equivalent electrical circuit of the semicircular pattern in the impedance spectrum of ZnO and Zn1-xCrxO nanoceramics sample is a parallel combination of bulk resistance (Rb) and bulk capacitance (Cb).

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