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Catalytic synthesis of hematite-mica pearlescent pigments using a low-temperature method

机译:低温法催化合成赤铁矿-云母珠光颜料

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A novel low-temperature method is described for the direct synthesis of Fe_2O_3/mica pearlescent pigments with ferric chloride as a precursor and trace Fe(Ⅱ) as a catalyst which does not require any calcination step. The as-synthesized pigments are characterized in detail by means of different techniques including X-ray diffraction, field emission scanning electron microscopy, energy dispersive spectroscopy, and colorimetry. The influence of various factors on the transformation from Fe(OH)_3 coating layer to crystalline hematite coating layer is investigated, respectively. Furthermore, this paper studies several critical technological parameters pertaining to the influences on morphology and color properties of the pigments such as the coating temperature and the pH value.
机译:描述了一种新型的低温方法,该方法无需氯化步骤就可以直接合成以氯化铁为前驱体和痕量Fe(Ⅱ)为催化剂的Fe_2O_3 /云母珠光颜料。所合成的颜料通过包括X射线衍射,场发射扫描电子显微镜,能量分散光谱和比色法在内的不同技术进行详细表征。分别研究了各种因素对Fe(OH)_3涂层向结晶赤铁矿涂层转化的影响。此外,本文研究了一些关键技术参数,这些参数涉及对颜料的形态和颜色特性的影响,例如涂层温度和pH值。

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