Gradient-hierarchic-aligned porosity SiOC ceramics
Yükleniyor...
Dosyalar
Tarih
2017
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Nature Publishing Group
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
This work describes a simple technique to produce porous ceramics with aligned porosity having very high permeability and specific surface area. SiOC-based compositions were processed from blends of three types of preceramic polymer and a catalyst, followed by curing and pyrolysis. The heating applied from the bottom of molds promoted the nucleation, expansion and rising of gas bubbles, and the creation of a ceramic matrix with axially oriented channels interconnected by small round pores. The samples were analyzed by SEM, tomography, BET, water immersion porosimetry and permeation to gas flow. The resulting bodies presented levels of open porosity (69.9-83.4%), average channel diameter (0.59-1.25 mm) and permeability (0.56-3.83 x 10(-9) m(2)) comparable to those of ceramic foams and honeycomb monoliths, but with specific surface area (4.8-121.9 m(2)/g) typical adsorbents, enabling these lotus-type ceramics to be advantageously used as catalytic supports and adsorption components in several environmental control applications.
Açıklama
Zeydanli, Damla/0000-0002-8550-0105; Vakifahmetoglu, Cekdar/0000-0003-1222-4362; de Mello Innocentini, Murilo Daniel/0000-0002-5396-7798
Anahtar Kelimeler
SiOC, Ceramics, Gradient
Kaynak
Scientific Reports
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
7
