Please use this identifier to cite or link to this item: doi:10.22028/D291-24116
Title: Corrosão em superfícies de vidros de metasilicatos de sódio e càlcio
Other Titles: Surface corrosion of soda-lime metasilicate glasses
Author(s): Ziemath, Ervino C.
Aegerter, Michel A.
Language: (Other)
Year of Publication: 1993
OPUS Source: Anais / 37° Congresso Brasileiro de Cerâmica : Curitiba ; 22 a 25 de majo de 1993 / Associação Brasileira de Cerâmica. - Vol. 2. - São Paulo, SP : Associação Brasileira de Cerâmica, 1993, S. 1055-1062
SWD key words: Kalknatronglas
DDC notations: 500 Science
Publikation type: Conference Paper
Abstract: -
Metasilicate glasses have a mean of 2 non-bridging oxigens per SiO4 tetrahedron, so that its structure is constituted essentially by (SiO3(2-))n chains. Due to the low polymerization degree of the SiO4 tetrahedra, the surface of such glasses undergoes pronounced physico-chemical changes in contact with water, acid solutions and with the surrounding atmosphere. Surfaces of a 2Na2O∙1CaO∙2SiO2 glass were submitted to corrosion by a weak HCl and HF solution. Infrared reflection spectroscopy measurements show that the characteristic bands of the glass change with leaching time. The prolonged corrosion by the acid solution gives spectra which approach that of a porous silica glass (Vycor). This leads to the conclusion that the acid corrosion produces a thin silica gel layer at the metasilicate glass surface.
Link to this record: urn:nbn:de:bsz:291-scidok-23282
Date of registration: 23-Jul-2009
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
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