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Title: Synthesis And Characterization Of Baceyo3 And Bazryo3 Composites For Solid Oxide Fuel Cell Applications And Microwave Sintering Of Nanoceramics
Researcher: Vasudevan R
Guide(s): Ganesan S
Keywords: Bazryo3 Composites
bulk resistance
Microwave Sintering
Nyquest impedance
Solid Oxide
Upload Date: 3-Sep-2014
University: Anna University
Completed Date: n.d.
Abstract: The technological interest of high temperature ceramic newlinenanocomposites in the power generation automotive industries has attracted newlinean extensive research due to the performance of solid oxide fuel cell SOFC newlineelectrolyte at high temperatures However the ionic conductivity and newlinechemical stability of the material have been limited due to the poor newlinepolarization of the material at high temperatures Recently the proton newlineconducting perovskite electrolytes possess superior conductivity at an newlineintermediate temperature range of about 400700 ITSOFCs reducing the newlinematerial strain defects The rare earth RE elements were substituted into the newlineproton conducting perovskite matrix to further enhance the ionic conductivity newlineand to maintain the chemical stability Grain growth is an important parameter newlinewhile sintering the ceramic material at high temperatures which affects the newlinemicrostructure and density of the material The novel microwave sintering newlinetechnique has been exploited due to its rapid sintering of material which newlineeffectively controls the grain growth newlineNanocrystalline BaCYBCYREOREYbNdSm newlinehigh temperature proton conductors were synthesised by the modified Pechini newlineroute Powder XRD results show that materials sintered at 1300 exhibit newlineorthorhombic crystalline structure with the particle size in the range of newlinenanometer scale BCYSm sample possesses higher lattice strain newlinecoefficient of 28 X 10 SEM micrograph shows bimodal distribution of newlinedense particles with an observable pores in the submicrometer scale The newlinemaximum theoretical density of about 95 was achieved for the BCYSm newlinesample IV and IP results show a higher open cell voltage OCV of 103V newlineand the maximum power density of 446 mWcm for the BCYSm sample newlinecompared to other samples indicating that the material is highly stable at newlinehigher current density From the Nyquest impedance plot the grain boundary newlinebulk resistance was measured to be 52 k and thus the bulk conductivity newline newline
Pagination: xxiii,170p
Appears in Departments:Faculty of Science and Humanities

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01_title.pdfAttached File173.06 kBAdobe PDFView/Open
02_certificate.pdf2.49 MBAdobe PDFView/Open
03_abstract.pdf94.73 kBAdobe PDFView/Open
04_acknowledgement.pdf62.67 kBAdobe PDFView/Open
05_contents.pdf169.02 kBAdobe PDFView/Open
06_chapter 1.pdf1.14 MBAdobe PDFView/Open
07_chapter 2.pdf6.83 MBAdobe PDFView/Open
08_chapter 3.pdf6.57 MBAdobe PDFView/Open
09_chapter 4.pdf4.12 MBAdobe PDFView/Open
10_chapter 5.pdf6.78 MBAdobe PDFView/Open
11_chapter 6.pdf4.73 MBAdobe PDFView/Open
12_chapter 7.pdf132.61 kBAdobe PDFView/Open
13_references.pdf192.7 kBAdobe PDFView/Open
14_publications.pdf128.17 kBAdobe PDFView/Open
15_vitae.pdf77.23 kBAdobe PDFView/Open

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