Please use this identifier to cite or link to this item: http://hdl.handle.net/10603/26481
Title: Online Ultrasonic charecterisation of bulk and nano perovskites and maraging steel
Researcher: Sakthipandi K
Guide(s): Rajendran V
Keywords: maraging steel
nano
perovskites
Ultrasonic
Upload Date: 10-Oct-2014
University: Anna University
Completed Date: n.d.
Abstract: Over the past few years the development and improvement of advance newlinematerials like RAMO where R trivalent rare earth elements and A divalent newlinealkaline earth ions perovskite manganites were required for potential applications newlinelike solid oxide fuel cells magnetic sensorsreading heads and frequency switching newlinedevices The development of nanostructured perovskite manganite material has newlinebeen explored in the fields of information technology telecommunication and newlinemedicine In the present study the three series of bulk and nanocrystalline newlineLCMO LCMO 075 080 and 085 LPMO LPMO newline03 04 and 05 and LSMO LSMO 032 035 and 037 perovskite newlinemanganite particles are prepared employing respectively solid state and newlinesonochemical reaction methods newlineThe complete characterisation of prepared samples is made by studies newlinesuch as density Xray diffraction XRD Energy dispersive analysis of an Xray newlinespectrometer EDX Fourier transform of infrared spectroscopy FTIR Scanning newlineelectron microscope SEM Transmission electron microscope TEM and surface newlinearea measurement S An indigenously designed experimental setup is used for newlineonline measurement of ultrasonic velocities and attenuation over wide range of newlinetemperatures from 300 to 400 K The temperature dependent ultrasonic parameters newlineshow an interesting anomaly in both bulk and nano perovskite samples The newlinemarked softening and hardening in sound velocities and attenuation are related to newlinephase transition temperature newlineThe existence of the crystalline nature with the orthorhombic crystal newlinestructure of bulk and nano LCMO perovskite samples is revealed through the XRD newlinepattern In addition the value of diffraction angle 2 is shifted to a lower value in newlinenano LCMO perovskite manganite when compared with the corresponding newlinecomposition of bulk LCMO samples The SEM TEM and BET characterisation newlinestudies confirms the particle size of bulk LCMO perovskite samples as 075 85 m newlineand for nano LCMO perovskite samples as 120 160 nm newline newline
Pagination: xx,187p
URI: http://hdl.handle.net/10603/26481
Appears in Departments:Faculty of Science and Humanities

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01_title.pdfAttached File84.88 kBAdobe PDFView/Open
02_certificate.pdf7.45 MBAdobe PDFView/Open
03_abstract.pdf86.33 kBAdobe PDFView/Open
04_acknowledgement.pdf65.27 kBAdobe PDFView/Open
05_contents.pdf167.53 kBAdobe PDFView/Open
06_chapter 1.pdf2.07 MBAdobe PDFView/Open
07_chapter 2.pdf3.09 MBAdobe PDFView/Open
08_chapter 3.pdf22.1 MBAdobe PDFView/Open
09_chapter 4.pdf175.15 kBAdobe PDFView/Open
10_references.pdf218.58 kBAdobe PDFView/Open
11_publications.pdf90.8 kBAdobe PDFView/Open
12_vitae.pdf68.07 kBAdobe PDFView/Open


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