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Title: Investigations on synthesis and characterization of nanoceramic composites and simulation studies on modeling and analysis of single & multi walled carbon nanotubes
Researcher: Pandu, Ratnakar
Guide(s): Ravinder Reddy, P
Gupta, A V S S K S
Keywords: Nanotechnology
Perovskite Ferroelectrics
Carbon Nanotubes
multi walled carbon nanotubes
Mechanical Engineering
Upload Date: 3-Sep-2012
University: Jawaharlal Nehru Technological University
Completed Date: January 2012
Abstract: To develop high quality nanomaterials such as ferroelectrics, Carbon Nanotubes etc for a specific uses, it is necessary to understand various phenomena concerning electrical and structural properties of the materials. For this, it is desired to make available as many experimental data as possible by using various techniques.The aim of the research work described in this thesis is focused on the synthesis and characterizations of three different types of materials viz:1.Pure BiFeO3 nanoceramic material,2.xCrFe2O4-(1-x) BiFeO3 which is a nanoceramic composite material, and 3.Carbon Nanotubes (CNTs) which is a single element nanomaterialAll these three materials have been synthesized and characterized. All of them have applications as memory devices, dielectric conductors and in electronic circuits. Further the work has been extended for simulation studies on Carbon Nanotubes using Finite Element Analysis.The basic idea of this research work is, to develop a low temperature processing technique and enhance the dielectric and ferroelectric properties of these ceramics. Polycrystalline samples of BiFeO3 are synthesized using sol-gel technique at the low temperature and the characteristics under XRD, SEM and DTA analysis are studied. During BiFeO3 nanoceramics experimental study, from XRD pattern, it is seen to the size of crystallite increases when the sintering temperature increases and the obtained strain in the crystallite decreases with growing sintering temperature. The size of the crystallite increases with increase in temperature and the lattice parameter decreases. SEM micrographs confirmed the increase in grain size with increase in sintering temperature. The particle size is found to follow the Gaussian distribution. Ferroelectric to paraelectric transition temperature (Tc) shows that the Curie temperature of pure BiFeO3 is 814°C which is close to the ideal value 827°C in DTA analysis.
Pagination: xxv, 212p.
Appears in Departments:Faculty of Mechanical Engineering

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01_title.pdfAttached File112.3 kBAdobe PDFView/Open
02_dedication.pdf86.32 kBAdobe PDFView/Open
03_certificate.pdf141.22 kBAdobe PDFView/Open
04_acknowledgements.pdf153.88 kBAdobe PDFView/Open
05_declaration.pdf114.28 kBAdobe PDFView/Open
06_abstract.pdf141.01 kBAdobe PDFView/Open
07_table of contents.pdf144.97 kBAdobe PDFView/Open
08_list of tables.pdf76.34 kBAdobe PDFView/Open
09_list of figures.pdf236.28 kBAdobe PDFView/Open
10_list of photographs.pdf105.03 kBAdobe PDFView/Open
11_notations.pdf71.55 kBAdobe PDFView/Open
12_list of paper published.pdf224.58 kBAdobe PDFView/Open
13_chapter 1.pdf335.01 kBAdobe PDFView/Open
14_chapter 2.pdf663.69 kBAdobe PDFView/Open
15_chapter 3.pdf1.25 MBAdobe PDFView/Open
16_chapter 4.pdf597.41 kBAdobe PDFView/Open
17_chapter 5.pdf857.99 kBAdobe PDFView/Open
18_chapter 6.pdf1.74 MBAdobe PDFView/Open
19_chapter 7.pdf966.97 kBAdobe PDFView/Open
20_chapter 8.pdf894.82 kBAdobe PDFView/Open
21_chapter 9.pdf199.05 kBAdobe PDFView/Open
22_references.pdf324.93 kBAdobe PDFView/Open

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