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2015 | 128 | 3 | 336-339
Article title

Effect of Urea on Synthesis of Ceramics Materials by the Modified Combustion Method

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EN
Abstracts
EN
The proportion of urea in the modified combustion method to prepare lithium metasilicate (Li₂SiO₃) powders was investigated. Reactions were performed using LiOH:H₂SiO₃:CH₄N₂O in molar ratios of 1:1:1, 1:1:2, 1:1:3, 1:1:4 and 1:1:5 which were heated at 450°C during 5 min. It was found, by X-ray diffraction, that LiOH:H₂SiO₃:CH₄N₂O in the ratio of 1:1:3 was the more adequate molar ratio to produce mainly Li₂SiO₃. It was observed that excess of urea produced mainly silicium dioxide (SiO₂) in coesite phase instead Li₂SiO₃. Thermogravimetric analyses showed that decomposition products of urea, such as biuret, cyanic acid and cyanuric acid, were found in samples prepared with high proportions of urea (1:1:4 and 1:1:5). Carbonates identified by IR spectroscopy were found in samples prepared with LiOH:H₂SiO₃:CH₄N₂O in 1:1:1, 1:1:2, 1:1:3, 1:1:14 and 1:1:5 molar ratios.
Keywords
EN
Publisher

Year
Volume
128
Issue
3
Pages
336-339
Physical description
Dates
published
2015-09
received
2015-02-19
(unknown)
2015-06-23
Contributors
author
  • Facultad de Ingeniería Química, Benemérita Universidad Autónoma de Puebla, C.P. 72570, Puebla, Pue., México
  • Instituto Nacional de Investigaciones Nucleares, Dirección de Investigación Tecnológica, C.P. 18-1027, 11801 México, DF, México
  • Facultad de Ingeniería Química, Benemérita Universidad Autónoma de Puebla, C.P. 72570, Puebla, Pue., México
  • Research Department, Universidad Popular Autónoma del Estado de Puebla (UPAEP), Puebla, México
  • Facultad de Ingeniería Química, Benemérita Universidad Autónoma de Puebla, C.P. 72570, Puebla, Pue., México
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv128n318kz
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