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Title: Hydrothermal synthesis of Yttrium Hydroxide and Oxide nanotubes
Authors: Koh, Janice Shi Wei.
Keywords: DRNTU::Engineering::Materials::Nanostructured materials
DRNTU::Engineering::Materials::Ceramic materials
DRNTU::Engineering::Materials::Material testing and characterization
Issue Date: 2009
Abstract: This report demonstrates an investigation on a hydrothermal method to synthesise yttrium hydroxide and post-annealing to obtain yttrium oxide nanotubes. For this study, sodium hydroxide was chosen as the solvent with yttria powder as starting material. Three parameters: solvent concentration, mass of yttria powder and temperature were varied to investigate their effects on nanotube growth. The optimised conditions were found to be 0.3 g of yttria starting powder reacted with 3 M sodium hydroixde at 190°C. The growth of yttrium hydroxide nanotubes can be explained with a dissolution-nucleation recrystallisation anisotropic growth mechanism. The formation of yttrium oxide nanotubes was found to be a dehydration transformation reaction from yttrium hydroxide with retention of morphology.
Rights: Nanyang Technological University
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:MSE Student Reports (FYP/IA/PA/PI)

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