Use of waste water glass as silica supplier in synthesis of pure and Mg-doped lanthanum silicate powders for IT-SOFC application
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Journal of the European Ceramic Society
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Water glass in alkali solution (Na2SiO3/NaOH) an abundant effluent, generated in the alkaline fusion of zircon
sand, represents a potential silica source to be converted in useful silica technological application. Actually, the
generation of energy by environmental-friendly method is one of the major challenges for researchers. Solid
Oxide Fuel Cells (SOFC) is efficient and environmentally clean technique to energy production, since it converts
chemical energy into electrical power, directly. Apatite-type lanthanum silicates are promising materials for
application as an electrolyte in intermediate temperature SOFC (IT-SOFC) because of their higher ionic conductivity,
in temperatures of range 600–700 °C, than conventional zirconia electrolytes. In this work, pure
(La9,56(SiO4)6O2,34) and Mg-doped (La9,8Si5,7Mg0,3O26,4) lanthanum silicate were synthesized, from that rich
effluent. Using the sol-gel followed by precipitation method, the single crystalline apatite phase of both silicates
was obtained by thermal treatment at 900 °C of their precursors. Sintered ceramic samples reached density of
higher than 90%.
Como referenciar
YAMAGATA, C.; LEME, D.R.; CASTANHO, S.R.H.M. Use of waste water glass as silica supplier in synthesis of pure and Mg-doped lanthanum silicate powders for IT-SOFC application. Journal of the European Ceramic Society, v. 39, n. 12, p. 3416-3420, 2019. DOI: 10.1016/j.jeurceramsoc.2019.03.045. Disponível em: http://repositorio.ipen.br/handle/123456789/30050. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.