【摘要】 针对硅灰石作为白色颜料的主要不利因素 ,对其进行超细粉碎和表面化学改性处理 ,改进硅灰石粉体粒度、粉体表面组成和表面结构 ,提高粉体的白度和折射率 ,进而提高遮盖力。改性后的硅灰石超细粉体具有良好的高级白色颜料性能。更多还原

【Abstract】 For the serious pressure from the three emergency subjects: environment, resources and sustaintionable development, it is necessary to develop some new kinds of substitutes for titanium white. As a potential raw material of high-grade white pigment, the advantage and disadvantage as well as process feasibility of the object of study, wollastonite, have been analyzed in this paper. The study of wollastonite surface procession showed that the sol-gel procession with self-made modifiers A, Z, S and M can raise its whiteness, and with modifier T can raise its index of refraction and its coveribility.更多还原