Evolving surface properties of stirred wet milled aluminum-doped titanium dioxide: A discretely heterogeneous system
Evolving surface properties of stirred wet milled aluminum-doped titanium dioxide: A discretely heterogeneous system
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DOI：
10.1016/j.powtec.2020.09.033
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发表时间：
2021-01-02
影响因子：
5.2
通讯作者：
Harbottle, David
中科院分区：
文献类型：
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作者：
Austin, David;Hassanpour, Ali;Harbottle, David
研究了掺铝TiO2的搅拌湿磨工艺。在2500-6000转/分钟的铣削速度下，pH值（i.e.p）。pH值从5.7转变为类似于8的pH值，而在8000rpm时，pH值的转变（即p）。是小。在8000转/分的铣削速度下，铣削性能的降低是由于主要铣削机制的改变。XPS显示，相对表面氧化铝含量（at.%）和颗粒比表面积与pH值（i.e.p）的变化呈近似线性相关。与表面氧化铝相对应。较低的pH值（即e.p）。通过高分辨率TEM图像分析来合理化。以8000转/分钟（超过颜料生产中使用的研磨能量）研磨的样品产生了大量的超细颗粒（d(50)）。
The stirred wet milling of aluminum-doped TiO2 was considered. At milling speeds of 2500-6000 rpm, the pH(i.e.p). shifted from pH 5.7 to pH similar to 8, while at 8000 rpm the shift in pH(i.e.p). was smaller. Milling at 8000 rpm, the reduced milling performance was attributed to a change in the predominant milling mechanism. XPS revealed an approximate linear correlation between the relative surface alumina content (at.%) and particle specific surface area, with the shifting pH(i.e.p). corresponding to the surface alumina. The lower pH(i.e.p). at 8000 rpm was rationalized by high resolution TEM image analysis. Samples milled at 8000 rpm (beyond mill energies used in pigment production) produced a significant quantity of ultra-fines (d(50)