摘要 : The influence of the acid nature on the structure and texture of silica precipitates has been studied. In synthesis of silica precipitates from sodium silicate in hydrochloric acid, twelve variables were modified simultaneously us... 展开 The influence of the acid nature on the structure and texture of silica precipitates has been studied. In synthesis of silica precipitates from sodium silicate in hydrochloric acid, twelve variables were modified simultaneously using a statistical method based on balanced incomplete blocks. The most important variables controlling the Broensted acidity and specific surface area were identified and compared with those corresponding to silica precipitates obtained in sulphuric acid in the sameconditions, reported in a previous paper [1].The initial concentration of sodium silicate solution is the most significant factor for both acids. The relative significance of some of the other variables is different, suggesting that the acid anion is involved in the complex mechanism of formation of silica precipitates. 收起