Low-toxicity red ceramic pigments for porcelainised stoneware from lanthanide-cerianite solid solutions
Low-toxicity red ceramic pigments for porcelainised stoneware from lanthanide-cerianite solid solutions
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DOI：
10.1039/b105830b
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发表时间：
2001-10-01
期刊：
影响因子：
9.8
通讯作者：
Monrós, G
中科院分区：
文献类型：
--
作者：
García, A;Llusar, M;Monrós, G
采用陶瓷法和共沉淀法制备了Ln-CeO_2（Ln = Pr，Tb，Eu）和M-CeO_2（M = Cr或In，分别作为过渡族和主族元素的参考样品）固溶体。由此产生的着色材料已被检查作为陶瓷化的石器的潜在颜料。着色机制是基于在铈矿禁带中引入一个额外的电子能级，由镧系元素离子的未成对4f电子引起。所获得的红色陶瓷颜料已被发现是用于陶瓷化的粗陶体的着色的有趣的替代品。此外，它们呈现出比经典的硫硒化镉或铬-LnAlO（3）基红色颜料低得多的毒性，因为发色剂（镨和铕离子）和陶瓷基质（铈土）都含有镧系元素。
Ln-CeO2 (Ln = Pr, Tb, Eu) and M-CeO2 solid solutions (reference samples with M = Cr or In, as transition and main group elements, respectively) have been prepared by ceramic and coprecipitation routes. The resulting coloured materials have been checked as potential pigments for porcelainised stoneware. The colouring mechanism is based on the introduction of an additional electronic level of energy in cerianite forbidden band, arising from unpaired 4f electrons of lanthanide ions. The red ceramic pigments obtained have been found to be interesting alternatives for the coloration of porcelainised stoneware bodies. In addition, they present a much lower toxicity than classical cadmium sulfoselenide or chromium-LnAlO(3) based red pigments, because both the chromophoric agent (praseodymium and europium ions) and ceramic matrix (cerianite) contain lanthanide elements.