以CoCl2·6H2O、ZnCl2、AlCl3和CrCl3·6H2O为原料, 采用水热法合成了CoAl2O4(AB2O4)尖晶石型纳米钴蓝色料. 采用色度分析、X射线衍射(XRD)、透射电镜(TEM)以及高分辨透射电镜(HRTEM)等研究了A位掺杂Zn2+和B位掺杂Cr3+时不同掺杂量以及不同水热合成温度对样品呈色、晶相组成及CoAl2O4尖晶石的晶粒大小、发育程度和晶面间距的影响. 结果表明, 掺杂Zn2+、Cr3+所得固溶体型钴蓝色料晶粒发育均不完整, 颗粒较于相同水热条件下获得的未掺杂样品更细小. A位掺杂Zn2+可降低CoAl2O4色料的合成温度, 在230℃便能制得呈色较佳的Co0.95Zn0.05Al2O4钴蓝色料. 随着Zn2+掺杂量的增加, 合成产物由蓝色转为绿色, 且呈色逐渐变浅. B位Cr3+掺杂则随着掺杂量的增加, 产物从蓝色逐步转为绿色, 但呈色逐渐变深. 就两者相比较, A位掺杂Zn2+更有利于色料明度值的提高而呈色鲜亮.
Nanosized spinel type cobalt blue pigments of CoAl2O4(AB2O4) were hydrothermally synthesized using CoCl2·6H2O, ZnCl2, AlCl3 and CrCl3·6H2O as raw materials. Colorimetric analysis, X-ray diffraction (XRD), transmission electron microscope (TEM) and High resolution transmission electron microscope(HRTEM) were employed to investigate the effects of various amounts of Zn2+ doping at A site and Cr3+ doping at B site and various hydrothermal temperatures on the coloration, crystal phase compositions, crystal size and interplanar spacing of the CoAl2O4 spinels. The results indicated that Zn2+ and Cr3+ doping cause incomplete crystal growth and result in smaller particles than that of undoped spinels obtained at the same hydrothermal conditions. Zn2+ doping at A site lowered the synthesis temperature of the spinel crystalline colorants. Co0.95Zn0.05Al2O4 pigments with good coloration were obtained at 230℃. The hues of the as-prepared pigments changed from blue to green with increased amount of Zn2+ doping, and the coloration of samples became lighter. Similarly, the hues of the pigments also changed from blue to green with increasing the amount of Cr3+, but the coloration became deeper. Zn2+ doped spinels are of better coloration than that of Cr3+ doped.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] | |
| [9] | |
| [10] | |
| [11] | CHEN Zhi-Zhan, SHI Er-Wei, LI Wen-Jun, et al. Hydrothermal synthesis and optical property of nano-sized CoAl2O4 pigment. Material Letters, 2002, 55(5): 281&ndash |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%