Effect of reaction conditions on size and morphology of SiO2 powder in a sol-gel process

被引:8
作者
Chang, YW [1 ]
Kim, WS [1 ]
Kim, WS [1 ]
机构
[1] KYUNG HEE UNIV,DEPT CHEM ENGN,INST MAT SCI & TECHNOL,SUWON 449701,SOUTH KOREA
关键词
silicon oxide; particle nucleation; particle growth; relative induction time; two-step growth;
D O I
10.1007/BF02706000
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We have investigated effects of the reaction conditions such as mixing of solution, reactant concentration, feeding time and molecular weight of alcohol solvents on the size and morphology of silicon oxide in a sol-gel process in Rushton type reactor. To describe the intensity oi mixing of solution the Fewer input, which means the energy dissipated in the solution, was used. The particle nucleation and growth processes of silicon oxide were varied with all the reaction conditions. However, the particle morphology oi silicon oxide depended mostly on the reactant concentration and molecular weight of alcohol solvents under various reaction conditions. If the supersaturation level of silicon oxide in the solution was promoted by variation of reaction conditions, the particle nucleation and growth processes were facilitated and it resulted in reduction of relative induction time and in increase of mean particle size of silicon oxide. To explain the principal mechanism of particle growth process of silicon oxide the two-step growth model was applied.
引用
收藏
页码:496 / 502
页数:7
相关论文
共 24 条
[11]   KINETIC STUDY OF SEEDED GROWTH OF BARIUM-SULFATE IN PRESENCE OF ADDITIVES [J].
LEUNG, WH ;
NANCOLLAS, GH .
JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY, 1978, 40 (11) :1871-1875
[12]   CRYSTAL-GROWTH AND DISSOLUTION OF BARIUM SULFATE IN PRESENCE OF ADDITIVES [J].
LIU, ST ;
NANCOLLAS, GH .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1975, 52 (03) :582-592
[13]  
LIU ST, 1973, J COLLOID INTERF SCI, V44, P442
[14]  
LUENG WH, 1978, J CRYST GROWTH, V44, P1631
[15]  
McCabe W.L., 1976, UNIT OPERATIONS CHEM
[16]  
McCartney E. R, 1958, J COLLOID SCI, V13, P383, DOI DOI 10.1016/0095-8522(58)90047-3
[17]   AN EXPERIMENTAL-STUDY OF THE EFFECT OF TURBULENT MIXING ON THE SELECTIVITY OF COMPETING REACTIONS [J].
MEHTA, RV ;
TARBELL, JM .
AICHE JOURNAL, 1987, 33 (07) :1089-1101
[18]  
NAKANISHI K, 1988, J CERAM SOC, V72, P421
[19]  
Nielsen A.E., 1964, KINETICS PRECIPITATI
[20]  
OGIHARA T, 1988, J AM CERAM SOC, V86, P476