Abstract
Mesoporous carbon-silica (C-SiO2) nanocomposites with different C/SiO2 molar ratios were used as precursor for fabricating silicon-based ceramics. Different silicon carbide nanostructures were synthesized by carbothermal reduction of mesoporous C-SiO2 nanocomposites via different heat treatments under argon. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption-desorption analysis were used to characterize C-SiO2 nanocomposites and SiC products. The major morphologies formed from the mesoporous C-SiO2 nanocomposites were nanoparticles and nanofibers. With higher quantity of P123, which is the surfactant for the mesopores, the BET surface area and pore volume increased, inducing a decrease of nanofibers. The mesoporous precursors were also heated at 1200 °C for 15 hours to make a nearly dense structure and then heated to the final temperature. The products were almost nanoparticles which had a larger size than those heated directly to 1450 °C. Therefore carbothermal reduction of mesoporous C-SiO2 precursors appears to be an effective means of accelerating the reaction and controlling SiC nanostructures.
| Original language | English |
|---|---|
| Title of host publication | Processing of Nanoparticle Structures and Composites - A Collection of Papers Presented at the 2008 Materials Science and Technology conference, MS and T08 |
| Pages | 71-78 |
| Number of pages | 8 |
| Volume | 208 |
| Publication status | Published - 2009 |
| Event | Processing of Nanoparticle Structures and Composites - 2008 Materials Science and Technology conference, MS and T08 - Pittsburgh, PA, United States of America Duration: 5 Oct 2008 → 9 Oct 2008 |
Publication series
| Name | Ceramic Transactions |
|---|---|
| Volume | 208 |
| ISSN (Print) | 10421122 |
Conference
| Conference | Processing of Nanoparticle Structures and Composites - 2008 Materials Science and Technology conference, MS and T08 |
|---|---|
| Country | United States of America |
| City | Pittsburgh, PA |
| Period | 5/10/08 → 9/10/08 |
Cite this
}
Fabrication of silicon-based ceramic synthesized from mesoporous carbon-silica nanocomposites. / Wang, Kun; Cheng, Yi Bing; Wang, Huanting.
Processing of Nanoparticle Structures and Composites - A Collection of Papers Presented at the 2008 Materials Science and Technology conference, MS and T08. Vol. 208 2009. p. 71-78 (Ceramic Transactions; Vol. 208).Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research › peer-review
TY - GEN
T1 - Fabrication of silicon-based ceramic synthesized from mesoporous carbon-silica nanocomposites
AU - Wang, Kun
AU - Cheng, Yi Bing
AU - Wang, Huanting
PY - 2009
Y1 - 2009
N2 - Mesoporous carbon-silica (C-SiO2) nanocomposites with different C/SiO2 molar ratios were used as precursor for fabricating silicon-based ceramics. Different silicon carbide nanostructures were synthesized by carbothermal reduction of mesoporous C-SiO2 nanocomposites via different heat treatments under argon. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption-desorption analysis were used to characterize C-SiO2 nanocomposites and SiC products. The major morphologies formed from the mesoporous C-SiO2 nanocomposites were nanoparticles and nanofibers. With higher quantity of P123, which is the surfactant for the mesopores, the BET surface area and pore volume increased, inducing a decrease of nanofibers. The mesoporous precursors were also heated at 1200 °C for 15 hours to make a nearly dense structure and then heated to the final temperature. The products were almost nanoparticles which had a larger size than those heated directly to 1450 °C. Therefore carbothermal reduction of mesoporous C-SiO2 precursors appears to be an effective means of accelerating the reaction and controlling SiC nanostructures.
AB - Mesoporous carbon-silica (C-SiO2) nanocomposites with different C/SiO2 molar ratios were used as precursor for fabricating silicon-based ceramics. Different silicon carbide nanostructures were synthesized by carbothermal reduction of mesoporous C-SiO2 nanocomposites via different heat treatments under argon. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption-desorption analysis were used to characterize C-SiO2 nanocomposites and SiC products. The major morphologies formed from the mesoporous C-SiO2 nanocomposites were nanoparticles and nanofibers. With higher quantity of P123, which is the surfactant for the mesopores, the BET surface area and pore volume increased, inducing a decrease of nanofibers. The mesoporous precursors were also heated at 1200 °C for 15 hours to make a nearly dense structure and then heated to the final temperature. The products were almost nanoparticles which had a larger size than those heated directly to 1450 °C. Therefore carbothermal reduction of mesoporous C-SiO2 precursors appears to be an effective means of accelerating the reaction and controlling SiC nanostructures.
UR - http://www.scopus.com/inward/record.url?scp=70449858009&partnerID=8YFLogxK
M3 - Conference Paper
SN - 9780470408469
VL - 208
T3 - Ceramic Transactions
SP - 71
EP - 78
BT - Processing of Nanoparticle Structures and Composites - A Collection of Papers Presented at the 2008 Materials Science and Technology conference, MS and T08
ER -