矿物颗粒度对粉末颜色的影响

The Effect of Mineral Particle Size on Powder Color

当一种有色材料被研磨后,在某些情况下被研磨成的粉末会呈现出与原有材料不同的颜色。运用控制变量法,仅对微米级别的有色材料进行研磨,并结合Mie散射理论探究在研磨前后其颜色的变化规律,并以明度(亮度)、色调(色相)、饱和度(纯度)定义颜色。选取4种不同颜色的材料,分别为色光三原色中的红色材料Fe 2O 3、绿色材料Cu 2(OH) 2CO 3、明度最高的白色材料ZrSiO 4以及明度最低的黑色材料Fe 3O 4。结果表明,对于微米级别的矿物颗粒,粒度越小,粉末的明度也就越高,而其色调和饱和度基本保持不变。

When a colored material is ground, in some cases the ground powder will exhibit a different color than the original material. In this paper, we use the control variable method to grind only the micronsized colored materials, and combine the Mie scattering theory to explore the color change before and after grinding, and define it by brightness, hue and saturation. A total of four different color materials were selected, namely red material Fe 2O 3, green material Cu 2(OH) 2CO 3, white material ZrSiO 4 with the brightest brightness and Fe 3O 4 with the lowest brightness. The results show that for micronsized mineral particles: the smaller the particle size, the higher the brightness of the powder, while the hue and saturation remain essentially unchanged.