Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/59107
Type: Artigo de periódico
Title: PARTICLES OF ALUMINUM METAPHOSPHATE CONTAINING CLOSED PORES - PREPARATION, CHARACTERIZATION AND OPTICAL-PROPERTIES
Author: LIMA, ECD
GALEMBECK, F
Abstract: Admixture of aluminum nitrate, sodium metaphosphate and ammonium hydroxide aqueous solutions yields non-crystalline 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-degrees-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.
Subject: ALUMINUM METAPHOSPHATE
CLOSED-PORE PARTICLES
HOLLOW PARTICLES
LIGHT BACKSCATTERER
TIO2 EXTENDER
WHITE PIGMENT
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Date Issue: 1993
Appears in Collections:Unicamp - Artigos e Outros Documentos

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