Preparation and characterization of diphasic sol-gel derived unsupported mullite membranes
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, cilt.58, sa.1, ss.6-11, 2011 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 58 Sayı: 1
- Basım Tarihi: 2011
- Doi Numarası: 10.1007/s10971-010-2347-x
- Dergi Adı: JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.6-11
- Anahtar Kelimeler: Diphasic gel, Mullite crystallization, Sol-gel, Unsupported ceramic membrane, SINGLE-PHASE GELS, STRUCTURAL EVOLUTION, SILICA MEMBRANES, MIXTURES, ALUMINA
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- Ankara Üniversitesi Adresli: Hayır
Özet
Diphasic gels prepared by mixing freshly prepared polymeric silica and polymeric boehmite sols through a modified Al-alkoxide route in mullite compositions led to the crystallization of mullite upon heat treatment at 775 A degrees C. Mullite formation was observed at a 100 A degrees C higher temperature when diphasic gels were formed by mixing aged polymeric sols containing about 2 nm in diameter boehmite species. These relatively low mullite formation temperatures were attributed to the nanoscale sizes of the polymeric species of the two amorphous phases present in the diphasic gels.