MORPHOLOGY OF GEL-GROWN BARIUM CARBONATE AGGREGATES - PH EFFECT ON CONTROL BY A SILICATE-CARBONATE MEMBRANE

被引:21
作者
BAIRD, T
BRATERMAN, PS
CHEN, P
GARCIARUIZ, JM
PEACOCK, RD
REID, A
机构
[1] UNIV N TEXAS,DEPT CHEM,DENTON,TX 76203
[2] UNIV GRANADA,CSIC,INST ANDALUZ GEOL,E-18002 GRANADA,SPAIN
关键词
BARIUM; CARBONATES; SILICATES; GELS;
D O I
10.1016/0025-5408(92)90241-Q
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We have examined in detail the formation of induced morphology crystalline aggregates (IMCAs) of barium carbonate in the presence of silica at high pH. We find a gradation in form with pH, from dendritic through sheet-like and spiral to more complex. Using SEM with EDX and Rutherford back-scattering, and ESCA, we show that the growth process is governed by a barium carbonate-silicate phase overlying the barium carbonate and controlling its development. This is a special and extreme case of control of growth habit by adsorbed additives.
引用
收藏
页码:1031 / 1040
页数:10
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