铁离子掺杂对铜铬黑颜料呈色性能的影响

人工晶体学报 ›› 2021, Vol. 50 ›› Issue (6): 1123-1130.

铁离子掺杂对铜铬黑颜料呈色性能的影响

白明敏¹, 李伟信², 王少华¹, 李歆玮¹, 王钦瑜¹, 汪永清¹

1.景德镇陶瓷大学材料科学与工程学院,景德镇 333000;
2.景德镇学院人文学院,景德镇 333000

收稿日期:2021-04-06 出版日期:2021-06-15 发布日期:2021-07-08
通讯作者: 汪永清,教授。E-mail:wyq8248@126.com
作者简介:白明敏(1985—),女,山西省人,博士,讲师。E-mail:bellebai2010@126.com
基金资助:
江西省教育厅项目(GJJ190735);景德镇市技术创新中心(重点实验室)(20202PTJS001);江西省高等学校大学生创新创业训练计划项目(S202010408031)

Effect of Fe³⁺ Doping on the Color Performance of CuCr₂O₄ Black Pigment

BAI Mingmin¹, LI Weixin², WANG Shaohua¹, LI Xinwei¹, WANG Qinyu¹, WANG Yongqing¹

1. School of Materials Science and Engineering, Jingdezhen Ceramic University, Jingdezhen 333000, China;
2. College of Humanities, Jingdezhen University, Jingdezhen 333000, China

Received:2021-04-06 Online:2021-06-15 Published:2021-07-08

摘要/Abstract

摘要： 为改善CuCr₂O₄黑色颜料呈色性能,将Fe³⁺掺杂进入CuCr₂O₄晶体中,采用共沉淀法制备CuCr_2-xFe_xO₄(x=0,0.04,0.05,0.06,0.07),并对所制备样品进行TG-DTA、XRD、SEM、Raman、XPS、UV-Vis吸收光谱和色度值的测试与表征。结果表明,Fe以三价态固溶进入Cr³⁺位置,未出现杂质相,得到的CuCr_2-xFe_xO₄晶粒细小、分散均匀。Fe³⁺掺杂可减小CuCr₂O₄的禁带宽度,从1.25 eV减小到1.08 eV,禁带宽度的减小是由于2p(O^2-)→3d(Fe³⁺)和Fe³⁺的d-d(⁶A_1g→⁴T_1g和 ⁶A_1g→⁴T_2g)电荷跃迁引起的。禁带宽度的减小使得黑色颜料对可见光(380~780 nm)的吸收率提高,L^*值减小,呈现出良好的黑度。得到的最佳黑色颜料为CuCr_1.95Fe_0.05O₄,L^*=17.63,a^*=-0.77,b^*=-1.61。

关键词: CuCr_2-xFe_xO₄, 黑色颜料, Fe³⁺掺杂, 尖晶石结构, 呈色性能

Abstract: In order to improve the color performance of CuCr₂O₄ black pigment, CuCr_2-xFe_xO₄ (x=0,0.04,0.05,0.06,0.07) were prepared by co-precipitation method. The samples were characterized by TG-DTA, XRD, SEM, Raman, XPS, UV-Vis and chromaticity values. The results show that the substitution of Fe³⁺ for Cr³⁺ in CuCr₂O₄, and the valence state of Fe is trivalent. There are no impurity phases. The CuCr_2-xFe_xO₄ has well-defined spinel structure, fine grain and good dispersion. The Fe³⁺ substitution decreases the band gap of pigments from 1.25 eV to 1.08 eV, attributes to 2p(O^2-)→3d(Fe³⁺) charge transform and d-d(⁶A_1g→⁴T_1g, ⁶A_1g→⁴T_2g) charge transform in Fe³⁺, which increases absorption in visible light(380 nm to 780 nm), decrease L^* value and shows good blackness. The CuCr_1.95Fe_0.05O₄ has the optimal chromaticity values which are L^*=17.63, a^*=-0.77, b^*=-1.61.

Key words: CuCr_2-xFe_xO₄, black pigment, Fe³⁺ doped, spinel structure, color performance

中图分类号:

TQ174.4

白明敏, 李伟信, 王少华, 李歆玮, 王钦瑜, 汪永清. 铁离子掺杂对铜铬黑颜料呈色性能的影响[J]. 人工晶体学报, 2021, 50(6): 1123-1130.

BAI Mingmin, LI Weixin, WANG Shaohua, LI Xinwei, WANG Qinyu, WANG Yongqing. Effect of Fe³⁺ Doping on the Color Performance of CuCr₂O₄ Black Pigment[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(6): 1123-1130.

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