Synthesis, Characterization and Evaluation of δ-Al2O3 Nanoparticles Prepared by Chemical Method with Variation of pH

Authors Vijaykumar S.1,2, Veerabhadrayya R. Hiremath2, Sushant S.K.3, Shridhar N. Mathad3

1 Department of Mechanical Engineering, S.D.M. College of Engineering and Technology, Dhavalagiri, 580002, Dharwad, Karnataka, India

2Department of Mechanical Engineering, K.L.E. Institute of Technology, Gokul Road, Hubballi, 580027 Karnataka, India

3Department of Engineering Physics, K.L.E. Institute of Technology, Gokul Road, Hubballi, 580027 Karnataka, India

Issue Volume 14, Year 2022, Number 3
Dates Received 11 April 2022; revised manuscript received 22 June 2022; published online 30 June 2022
Citation Vijaykumar S., Veerabhadrayya R. Hiremath, Sushant S.K., Shridhar N. Mathad, J. Nano- Electron. Phys. 14 No 3, 03027 (2022)
PACS Number(s) 61.46. + w, 77.84.Bw, 73.61.Ga, 71.23.Cq
Keywords Aluminum oxide, Nanoparticles (70) , XRD (76) , W-H plot, SS plot.

This research aims to analyze nanoparticles made by adjusting the pH value in the coprecipitation synthesis process with the help of aluminum chloride. The prepared samples are pH adjusted using ammonium hydroxide. The samples are calcined at 650 °C and the pH values of the synthesized samples are 8, 9, 9.5 (S1, S2, S3). X-ray diffraction (XRD) analysis of the prepared samples confirms their orthorhombic structure. The average crystal size of the prepared δ-Al2O3 samples is 3.650, 2.741 and 2.806 nm for S1, S2 and S3, respectively. The lattice parameter is in the range of 5.59 to 5.63 for a, 5.57 to 5.69 for b, and 23.75 to 23.79 for c, pH = 8, 9, and 9.5, respectively, according to XRD analysis. The volume is 740 to 759 Å3, dislocation density (D) is in the range from 2.020 to 3.353 and mechanical characteristics (strain) are among the parameters provided. The Williamson-Hall and size-strain plots are both examined extensively. The results are compared showing that the crystal size of the sample is in the range of 2.2 to 2.8 nm and the strain is between 0.0193 to 0.0702 as per the W-H plots, and for the SS plots, the crystal size is in the range of 0.97 to 1.35 nm and the strain is between 0.314 to 0.409.

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