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Hydroxyl Content of BaTiO^sub 3^ Nanoparticles with Varied Size
Ist Teil von
Journal of the American Ceramic Society, 2013-09, Vol.96 (9), p.2987
Ort / Verlag
Columbus: Wiley Subscription Services, Inc
Erscheinungsjahr
2013
Link zum Volltext
Quelle
Wiley-Blackwell Journals
Beschreibungen/Notizen
Different types of tetragonal BaTiO... particles were synthesized in a wet chemical process including an autoclave treatment. The synthesis and autoclaving medium was varied from isopropyl alcohol to water in different ratios, leading to a size variation of the particles from 38 to 145 nm. By applying combustion analysis of carbon and hydrogen (C/H analysis) released from the samples, it can be demonstrated that the amount of hydroxyl impurities incorporated into the crystal lattices of the particles increases with the water content of the synthesis medium. C/H analysis is a suitable tool for this characterization task as it allows discriminating different sources of these elements, i.e., different impurities. By comparing the self-synthesized particles with commercial ones, it can be concluded that the particle size has the dominant influence on the tetragonality, if the amount of internal hydroxyl groups is relatively low. In contrast, if the amount of water originating from the internal OH groups is elevated (greater than ~0.4 wt%) an impairment of the tetragonality is caused. (ProQuest: ... denotes formulae/symbols omitted.)