Elaboration of boehmite nano-powders by spray-pyrolysis
Carregando...
Arquivos
Fonte externa
Fonte externa
Data
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V. Sa
Tipo
Artigo
Direito de acesso
Acesso restrito
Arquivos
Fonte externa
Fonte externa
Resumo
Boehmite (gamma-AlOOH) synthesis have been investigated using a spray pyrolysis (SP) device starting from a stable sol of Al-tri-sec-butoxide peptized by nitric acid. Free spherical particles from 100 to 500 nm have been elaborated. Particles sub-structure is made of nano-crystalline boehmite with very small average crystallite size (one crystal cell along the b axis). The nano-crystalline boehmite synthesized by SP at low temperature (200 degrees C) is spontaneously dispersible in water without any surface treatment. Boehmite powder may be transformed to transition gamma-alumina by heat post-treatment. Powders of sub-micrometric and spherical gamma-alumina particles may also be synthesized by SP at 700 degrees C. (C) 2008 Elsevier B.V. All rights reserved.
Descrição
Palavras-chave
Spray-pyrolysis, Nano-powders, Boehmite, Alumina, Sol-gel
Idioma
Inglês
Citação
Powder Technology. Lausanne: Elsevier B.V. Sa, v. 190, n. 1-2, p. 95-98, 2009.
