Silica from triethylammonium tris (oxalato) silicate (IV) thermal decomposition
Creators
- 1. UNESP, Araraquara, SP (Brazil). Inst. de Quimica
Description
Silica can be obtained from differents precursors by differents methods. In this paper it has been investigated the thermal decomposition of triethylammonium tris (oxalato) silicate (IV) to render silica. Among the trisoxalato-complexes of silicon preparation methods reviewed it has been used the Bessler's one with the reflux adaptaded in microwave oven. Thermal decomposition analysis of the compound has been made by TG-DTG and DTA curves. Silica powders obtained and heated between 300 to 9000C in a oven were characterized by infrared vibrational spectroscopy, X-ray powder difraction and nitrogen adsorption isotherm (BET). The triethylammonium tris (oxalato) silicate (IV) thermal decomposition takes place at 3000C and the silica powder obtained is non cristalline with impurities that are eliminated with heating at 4000C. (author)
Abstract (Portuguese)
Silica pode ser obtida a partir de diferentes precursores e metodos. Neste trabalho investigou-se a decomposicao termica do oxalatossilicato de trietilamonio para obter silica. Dentre os metodos de sintese de oxalatossilicatos de varias aminas citados na Literatura utilizou-se o metodo de Bessler adaptado sob microondas. O estudo do comportamento termico deste composto foi realizado atraves das curvas TG-DTG e DTA. A silica obtida e tratada em diferentes temperaturas entre 300 e 9000C em forno tipo mufla foi caracterizada atraves de espectroscopia vibracional no infravermlho, difracao de raios-X pelo metodo de po e medidas de superficie especifica pelo metodo de BET. A decomposicao do oxalatossilicato de trietilamonio ocorre a 3000C obtendo-se silica nao cristalina, mas ainda com impurezas do precursor, que sao eliminadas com tratamento a 4000C. (autor)Files
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Additional details
Additional titles
- Original title (Portuguese)
- Obtencao de silica a partir da decomposicao termica de oxalatossilicato de trietilamonio
Publishing Information
- Imprint Title
- Proceedings of the 34. Brazilian Congress on Ceramics. v. 1
- Imprint Pagination
- 341 p.
- Journal Page Range
- p. 203-208.
- Report number
- INIS-BR--2255
Conference
- Title
- 34. Brazilian Congress on Ceramics.
- Dates
- 20-23 May 1990.
- Place
- Blumenau, SC (Brazil).
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 21084537
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- AMMONIUM COMPOUNDS; INFRARED SPECTRA; OXALATES; SILICON OXIDES; SYNTHESIS; X-RAY DIFFRACTION
- Descriptors DEC
- CARBOXYLIC ACID SALTS; CHALCOGENIDES; COHERENT SCATTERING; DIFFRACTION; OXIDES; OXYGEN COMPOUNDS; SCATTERING; SILICON COMPOUNDS; SPECTRA
Optional Information
- Notes
- Imprint:Anais do 34. Congresso Brasileiro de Ceramica. v. 1.