Diffusion Structural Analysis for characterization of ceramics and glasses from gels: I. Principle of the method and its use in the study of silica gels preparation

1994 ◽  
Vol 2 (1-3) ◽  
pp. 301-304 ◽  
Author(s):  
V. Balek ◽  
Z. M�lek ◽  
H. J. Pentinghaus
Keyword(s):  
Structural Analysis ◽  
Silica Gels ◽  
Diffusion Structural Analysis

MECHANICAL CHARACTERIZATION OF MATERIALS AND DIAGNOSIS OF STRUCTURES BY INVERSE ANALYSES: SOME INNOVATIVE PROCEDURES AND APPLICATIONS

2014 ◽  
Vol 11 (03) ◽  
pp. 1343002 ◽  
Author(s):  
GIULIO MAIER ◽  
VLADIMIR BULJAK ◽  
TOMASZ GARBOWSKI ◽  
GIUSEPPE COCCHETTI ◽  
GIORGIO NOVATI
Keyword(s):  
Structural Analysis ◽  
Digital Image Correlation ◽  
Residual Stresses ◽  
Mechanical Characterization ◽  
Image Correlation ◽  
Alkali Silica Reaction ◽  
Compression Tests ◽  
Material Models ◽  
Characterization Of Materials

A survey is presented herein of some recent research contributions to the methodology of inverse structural analysis based on statical tests for diagnosis of possibly damaged structures and for mechanical characterization of materials in diverse industrial environments. The following issues are briefly considered: identifications of parameters in material models and of residual stresses on the basis of indentation experiments; mechanical characterization of free-foils and laminates by cruciform and compression tests and digital image correlation measurements; diagnosis, both superficially and in depth, of concrete dams, possibly affected by alkali-silica-reaction or otherwise damaged.

Chromatographic characterization of surface-modified silica gels

1973 ◽  
Vol 87 (1) ◽  
pp. 35-48 ◽  
Author(s):  
Shubhender Kapila ◽  
Walter A. Aue ◽  
Joseph M. Augl
Keyword(s):  
Silica Gels ◽  
Modified Silica ◽  
Chromatographic Characterization ◽  
Surface Modified ◽  
Modified Silica Gels

Characterization of Selenium Doped Silica Gels Synthesized by Sol-Gel Method

2014 ◽  
Vol 805 ◽  
pp. 564-569
Author(s):  
Renata Andrade Kobayashi ◽  
Samuel Marcio Toffoli
Keyword(s):  
Sol Gel ◽  
Silica Gels ◽  
Glassy Matrix ◽  
Industrial Glass ◽  
Rare Element ◽  
Gel Method ◽  
Sol Gel Method ◽  
Red Color ◽  
Synthesized Materials

Selenium is a rare element in nature. It is used in the food, pharmaceutical, and glass industries. In commercial glasses, selenium is the element responsible for most of the pink or light red color, but its effect is primarily dependent on the oxidation state of the element in the glassy matrix. Besides, selenium is highly volatile, and as high as 80 wt% may be lost in the furnace during the industrial glass elaboration. The sol–gel method yields synthesized materials of high purity and homogeneity, and uses low processing temperatures. Samples of silica gels were obtained by sol-gel method, incorporating precursors of selenium, with the main objective of reducing selenium losses during its heating. The results of optical absorption, XRD and thermal analysis (TGA, DSC) of the gels are presented and discussed.

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