探讨含铜颜料、氧化铜和孔雀石的颜色及其在陶瓷釉中的来源

Colorants Pub Date : 2022-09-26 DOI:10.3390/colorants1040023
Iris Peng, Katie Hills‐Kimball, I. Lovelace, Junyu Wang, M. Rios, Ou Chen, Li-Qiong Wang
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引用次数: 2

摘要

利用SEM、UV-Vis FORS、XRD、FTIR和EPR等一系列分析和光谱技术,在广泛的烧成温度范围内系统地研究了含铜颜料、氧化铜和孔雀石的颜色及其在陶瓷釉中的来源,以获得釉在烧成过程中结构和化学转变的新见解。所研究的两种着色剂分别是黑色氧化铜(CuO)纳米粉末和蓝绿色碱式碳酸铜或孔雀石(Cu2CO3(OH)2),这两种着色剂在烧制后都会产生最终的浅蓝色。此外,使用碳化硅(SiC)局部还原CuO来模拟还原环境下的烧成釉,并产生最终的红色。在较低的温度下,孔雀石被发现在550℃时分解成CuO,这说明了两种不同的铜着色剂可以互换使用,形成相同的“罗宾蛋蓝”颜色的原因。在850℃下,发生釉料烧结过程,导致Cu2+呈方形平面分布,并观察到蓝色。这种结构变化发生在低于釉面熔点的温度下,表明釉面变色不需要完全玻璃化。相反,通过添加SiC将Cu2+还原为Cu+,直到釉料烧制温度超过熔点(1000°C)才发生,这表明氧化还原反应需要高温才能发生。本研究揭示了中间色釉相互作用,这有利于理解和预测釉面在不同温度下的着色,本研究的结果可以应用于艺术家更好地控制釉面生产,并更深入地欣赏陶瓷釉面化学和美学。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exploring the Colors of Copper-Containing Pigments, Copper (II) Oxide and Malachite, and Their Origins in Ceramic Glazes
The colors of copper-containing pigments, copper (II) oxide and malachite, and their origins in ceramic glazes were systematically examined over a wide firing temperature range using a suite of analytical and spectroscopy techniques including SEM, UV-Vis FORS, XRD, FTIR, and EPR to gain new insight into the structural and chemical transformations of the glaze during firing. The two colorants investigated were black copper (II) oxide (CuO) nanopowder and blue-green basic copper carbonate, or malachite (Cu2CO3(OH)2), both of which produce a final light blue color following firing. Additionally, silicon carbide (SiC) was used to locally reduce CuO to simulate firing glazes in a reductive environment and produce a final red color. At lower temperatures, malachite was found to decompose to form CuO at 550 °C, elucidating the reason that two different copper colorants could be used interchangeably to form the same “Robin’s Egg Blue” color. At 850 °C, a glaze sintering process occurred, resulting in the distribution of Cu2+ in a square planar geometry and an observed blue color. This structural change occurred at temperatures lower than the glaze’s melting point, indicating that complete vitrification of the glaze is not required for glaze coloration. Conversely, the reduction in Cu2+ to Cu+ through the addition of SiC did not occur until the glaze was fired above the melting temperature (1000 °C), signifying that high temperatures are required for the redox reaction to occur. This study sheds light on intermediate colorant-glaze interactions that are beneficial for understanding and predicting glaze coloring upon exposure to varying temperatures, and the results from this study can be applied to better-controlled glaze production for artists and a deeper appreciation of ceramic glaze chemistry and aesthetics.
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