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Type: Artigo de periódico
Title: Particles Of Aluminum Metaphosphate Containing Closed Pores. Preparation, Characterization And Optical Properties
Author: de Oliveira Lima E.C.
Galembeck F.
Abstract: Admixture of aluminum nitrate, sodium metaphosphate and ammonium hydroxide aqueous solutions yields noncrystalline solid precipitates. Using various aluminum: phosphorus ratios in the reacting mixtures, a range of particulate solids is obtained, the thermal behavior of which depends largely on the Al: P molar ratio in each solid. Upon heating to 600-700°C for times ranging from 30 s to 10 min, closed pores are formed within the particles of the solids in which the Al: P ratio is less than unity. The particles which are thus obtained are powerful light backscatterers. Closed-pore formation and growth can be monitored in real time by heating the particles under the condensed beam of a transmission electron microscope. © 1993.
Rights: fechado
Identifier DOI: 10.1016/0927-7757(93)80417-D
Date Issue: 1993
Appears in Collections:Unicamp - Artigos e Outros Documentos

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