Preparation of alumina gel derived from boehmite sol and its sintering behavior

@article{ART002325719},
author={ Heon Kong and Jong-Keun Lee and Sang-Jin Lee },
title={Preparation of alumina gel derived from boehmite sol and its sintering behavior},
journal={Journal of Ceramic Processing Research},
issn={1229-9162},
year={2017},
volume={18},
number={10},
pages={726-730},
doi={10.36410/jcpr.2017.18.10.726},
url={http://dx.doi.org/10.36410/jcpr.2017.18.10.726}

TY - JOUR
AU - Heon Kong
AU - Jong-Keun Lee
AU - Sang-Jin Lee
TI - Preparation of alumina gel derived from boehmite sol and its sintering behavior
T2 - Journal of Ceramic Processing Research
PY - 2017
VL - 18
IS - 10
PB - 한양대학교 청정에너지연구소
SP - 726-730
SN - 1229-9162
AB - Sintered alumina samples were prepared by sol-gel method with three types of boehmite powders as starting materials. All dried gels were completely transformed to corundum phase at temperature above 1200 o C. Sintering characteristics of the dried gels were investigated according to heat treatment temperature. Relative densities of these gels dried at 1000 o C, 1200 o C and 1400 o C were 40%, 65% and 75% respectively, indicating incomplete densification. Specific surface areas of the dried gels heated at temperature up to 1000 o C depended on crystal grain sizes of boehmite powder used. However, specific surface areas of samples heated at 1200 oC were almost the same (range, 7.4 ~ 8.3 m2 /g). Overall pore volume decreased with increasing sintering temperature. However, macropore gradually expanded due to sintering shrinkage of crystal grains, reaching a maximum at 1400 o C. Sintered body had a vermicular porous structure at sintering temperature up to 1300 o C. However, sintered body at sintering temperature of 1400 o C contained a relatively large amount of closed pores.
KW - Sol-gel method, Boehmite, Alumina gel, Microstructure, Sintering.
DO - 10.36410/jcpr.2017.18.10.726
UR - http://dx.doi.org/10.36410/jcpr.2017.18.10.726
ER -

Heon Kong , Jong-Keun Lee and Sang-Jin Lee (2017). Preparation of alumina gel derived from boehmite sol and its sintering behavior. Journal of Ceramic Processing Research, 18( 10), 726- 730.

Heon Kong , Jong-Keun Lee and Sang-Jin Lee . 2017, “Preparation of alumina gel derived from boehmite sol and its sintering behavior”, Journal of Ceramic Processing Research, vol. 18, no. 10, pp. 726-730. Available from: doi:10.36410/jcpr.2017.18.10.726

Heon Kong Jong-Keun Lee et al. Sang-Jin Lee “Preparation of alumina gel derived from boehmite sol and its sintering behavior” Journal of Ceramic Processing Research 18.10 pp. 726-730 (2017): 726.

Heon Kong , Jong-Keun Lee , Sang-Jin Lee . Preparation of alumina gel derived from boehmite sol and its sintering behavior Journal of Ceramic Processing Research [Internet]. 2017; 18( 10), : 726-730. Available from: doi:10.36410/jcpr.2017.18.10.726

Heon Kong , Jong-Keun Lee and Sang-Jin Lee . “Preparation of alumina gel derived from boehmite sol and its sintering behavior” Journal of Ceramic Processing Research 18, no.10 (2017): 726-730. doi: 10.36410/jcpr.2017.18.10.726

홈 권호 목록 논문 목록 논문 상세

Preparation of alumina gel derived from boehmite sol and its sintering behavior

Journal of Ceramic Processing Research

약어 : J. Ceram. Process. Res.

2017, vol.18, no.10, pp.726 - 730

DOI : 10.36410/jcpr.2017.18.10.726

발행기관 : 한양대학교 청정에너지연구소

연구분야 : 재료공학

Heon Kong¹ , Jong-Keun Lee² , Sang-Jin Lee³

¹Mokpo National University

²Daehan Ceramic Co

³Mokpo National University

인용한 논문 수 : 1 서지 간략 보기

초록

Sintered alumina samples were prepared by sol-gel method with three types of boehmite powders as starting materials. All dried gels were completely transformed to corundum phase at temperature above 1200 o C. Sintering characteristics of the dried gels were investigated according to heat treatment temperature. Relative densities of these gels dried at 1000 o C, 1200 o C and 1400 o C were 40%, 65% and 75% respectively, indicating incomplete densification. Specific surface areas of the dried gels heated at temperature up to 1000 o C depended on crystal grain sizes of boehmite powder used. However, specific surface areas of samples heated at 1200 oC were almost the same (range, 7.4 ~ 8.3 m2 /g). Overall pore volume decreased with increasing sintering temperature. However, macropore gradually expanded due to sintering shrinkage of crystal grains, reaching a maximum at 1400 o C. Sintered body had a vermicular porous structure at sintering temperature up to 1300 o C. However, sintered body at sintering temperature of 1400 o C contained a relatively large amount of closed pores.