Abstract
In this work has been investigated the influence of the TEOS/PDMS hybrid size during the pyrolysis process to obtain the related silicon oxycarbide glasses. Hybrids monolithic pieces (100 mm × 50 mm × 5 mm), were crushed (1 mm × 1 mm × 1 mm) and grounded in agate or attrition to 16 and 3 urn, respectively. Then, they were pyrolyzed at 1100 °C to obtain silicon oxycarbide glasses (SiOC). These materials present structural and microstructural differences. The monolithic sample showed the highest %C into the silica network (34 %), and after grounding in agate mortar decreased to 26 %. However the attrition milled sample reached %C values similar to the monolithic (32 %). This agrees with FT-IR band at 880 cm'1 assigned to Si-C bonds formation and related to higher carbon content into silica network. The carbon free phase displays a domain size of 3.44 nm which increased to 3.66 nm for the attrition milled. This result is due to a higher graphitization degree. The SiOC monolithic sample morphology displays spherical interconnected particles with pores of 12 urn. This morphology disappeared for the SiOC attrition milled sample, formed by irregular particles of 3 pm.
Translated title of the contribution | Influence of the hybrid material size in silicon oxycarbide materials characteristics |
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Original language | Spanish |
Pages (from-to) | 157-164 |
Number of pages | 8 |
Journal | Boletin de la Sociedad Espanola de Ceramica y Vidrio |
Volume | 51 |
Issue number | 3 |
DOIs | |
Publication status | Published - May 2012 |
Externally published | Yes |
Keywords
- Hybrid
- Porosity
- Pyrolysis
- Silicon oxycarbide
- Size
ASJC Scopus subject areas
- Mechanics of Materials
- Industrial and Manufacturing Engineering
- Ceramics and Composites