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|Type:||Artigo de periódico|
|Title:||Citric Acid Effect On Aqueous Sol-gel Cordierite Synthesis|
Da Silva N.T.
|Abstract:||Cordierite was synthesized by a simple aqueous sol-gel route. Citric acid action as a chelant for the Al3+ ion, and for controlling phase segregation during the drying and initial thermal treatment of the gel, results in an amorphous precursor that crystallizes to μ-cordierite and spinel. The changes in the ratios of the crystalline phases, formed during dry gel calcination at 1000°C for 12 h were dependent on the ratio (L/M) of citric acid/Al3+ (mol/mol). For L/M3 and L/M5 samples, the ratio between the amount of μ-cordierite phase and the amount of spinel phase was the same, while, for the sample L/M1, the amount of μ-cordierite was larger than that found in the other samples. © 2000 Elsevier Science B.V. All rights reserved.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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