Cobalt minimisation in willemite (CoxZn2-xSiO4) ceramic pigments

被引：82

作者：

Fores, A ^{[1
]}

Llusar, M ^{[1
]}

Badenes, JA ^{[1
]}

Calbo, J ^{[1
]}

Tena, MA ^{[1
]}

Monrós, G ^{[1
]}

机构：

[1] Univ Jaume 1, Dept Quim Inorgan & Organ, Castellon de La Plana 12080, Spain

来源：

GREEN CHEMISTRY | 2000年 / 2卷 / 03期

关键词：

D O I：

10.1039/b000748j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Industrially available blue ceramic pigments, with the exception of vanadium-zircon blue, (Zr,V)SiO4, contain Co. To minimise the use of toxic and scarce cobalt, while also maintaining an intense blue colour, the performance as blue ceramic pigments of both Co2+-Zn2SiO4 (willemite) and Zn2+-Co2SiO4 (olivine) solid solutions was studied. The addition of cobalt in the willemite lattice was minimised. A wide range of compositions, CoxZn2-xSiO4 (x = 2, 1.95, 1.5, 1, 0.9, 0.5, 0.05 and 0), were prepared and characterised by X-ray diffraction, lattice parameter measurements, UV-VIS-NIR spectroscopy, CIE-L*a*b* colour measurements and electronic microscopy (SEM/EDAX). The results show that an intense and more blue ceramic pigment is obtained based on the willemite lattice, with an optimised, low Co content, ranging from 25 mol% Co (Co0.5Zn1.5SiO4) to 2.5 mol% Co (Co0.05Zn1.95SiO4). This last composition (with only 2.5 mol% Co) exhibits the best blue hue once enamelled (b* = -39), though it is also considerably lighter (L* = 57).

引用

页码：93 / 100

页数：8

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