| 固相法制备掺杂型高色度CoxM1-xAl2O4/高岭土复合颜料 |
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| 引用本文： | 张安杰,陶雯,曾慧崇,王乃迪,牟斌,齐彦兴,李华明.固相法制备掺杂型高色度CoxM1-xAl2O4/高岭土复合颜料[J].硅酸盐通报,2021,40(9):3081-3089. |
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| 作者姓名： | 张安杰 陶雯 曾慧崇 王乃迪 牟斌 齐彦兴 李华明 |
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| 作者单位： | 1.西北永新涂料有限公司,兰州 730046;2.中国科学院兰州化学物理研究所,甘肃省黏土矿物应用研究重点实验室,兰州 730000;3.中国科学院兰州化学物理研究所,精细石油化工中间体国家工程研究中心,兰州 730000 |
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| 基金项目： | 中国博士后科学基金面上项目(2019M663958XB);兰州市城关区人才创新创业类项目(2020RCCX0007) |
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| 摘 要： | 为了制备低成本、高色度的钴蓝颜料,本文以高岭土为载体,以Al2O3和Co3O4为主要原料,通过引入ZnO、CaO及MgO不同金属氧化物,采用固相法制备了高色度(CoxM1-xAl2O4)/高岭土复合颜料(M为Ca2+、Mg2+或Zn2+)。系统考察了研磨时间、煅烧温度、煅烧时间和不同金属氧化物掺量对复合颜料呈色性能的影响规律。研究表明,在煅烧温度1 200 ℃、研磨时间12 h和n(Co2+)/n(M2+)为3:2时,制得的复合颜料具有最好的呈色性能(L*=53.68,a*=7.58,b*=-62.89)。同时,引入不同的金属元素,可实现对复合颜料颜色的调控,引入Ca2+后,所制备的CoxCa1-xAl2O4复合颜料偏红相,而引入Zn2+后,所制备的CoxZn1-xAl2O4复合颜料偏绿相。通过相关表征,提出了复合颜料的呈色机理,在颜料制备过程中,引入与Co2+离子半径接近的Mg2+或Zn2+,Mg2+或Zn2+可进入CoAl2O4的四面体配位中,部分替代Co2+,形成MgAl2O4-CoAl2O4或ZnAl2O4-CoAl2O4的固溶体,而引入离子半径较大的Ca2+,形成CaAl2O4和CoAl2O4的均相混合物。最后,将制得复合颜料应用到有机硅耐热涂料中,可以明显提高有机硅涂料的热稳定性。
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| 关 键 词： | 复合颜料 钴蓝 高岭土 呈色机理 耐热涂料 |
| 收稿时间： | 2021-03-26 |
Preparation of High-Chroma CoxM1-xAl2O4/Kaolin Composite Pigment via Solid-Phase Method |
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| ZHANG Anjie,TAO Wen,ZENG Huichong,WANG Naidi,MU Bin,QI Yanxing,LI Huaming.Preparation of High-Chroma CoxM1-xAl2O4/Kaolin Composite Pigment via Solid-Phase Method[J].Bulletin of the Chinese Ceramic Society,2021,40(9):3081-3089. |
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| Authors: | ZHANG Anjie TAO Wen ZENG Huichong WANG Naidi MU Bin QI Yanxing LI Huaming |
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| Affiliation: | 1. Northwest Yongxin Coatings Limited Company, Lanzhou 730046, China;2. Key Laboratory of Clay Mineral Applied Research of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;3. National Engineering Research Center of Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China |
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| Abstract: | In this study, the low-cost and high-chroma CoxM1-xAl2O4/kaolin (M=Zn2+, Ca2+ or Mg2+) composite pigments were prepared by solid-phase method using kaolin, Co3O4, α-Al2O3 and metal oxides (ZnO, CaO or MgO) as raw materials. The effect of preparation conditions on the color properties of composite pigments was systematically investigated, including calcining temperature, grinding time, the added amounts and the types of different metal ions of Zn2+, Ca2+ or Mg2+. As the calcining temperature, grinding time and molar ratio of Co2+ to M2+ are 1 200 ℃, 12 h and 3:2, respectively, the as-prepared composite pigments present the best color performance (L*=53.68, a*=7.58, b*=-62.89). Furthermore, the color of composite pigments can be facilely adjusted by incorporating different metal elements. After incorporation of Ca2+, the obtained composite pigments present the blue color with a red hue, but CoxZn1-xAl2O4 composite pigments are blue with a green hue. Based on the relevant characterizations, the possible coloring mechanism was proposed. Due to the similar ion radius of the tetrahedrally coordinated Co2+ and Mg2+ or Zn2+, Mg2+ or Zn2+ can enter into the tetrahedrally coordinated sites of CoAl2O4 to substitute Co2+and form the solid solutions ofMgAl2O4-CoAl2O4 (or ZnAl2O4-CoAl2O4). However, the ion radius of Ca2+ is higher than that of Co2+, the introduction of Ca2+ led to forming the homogeneous mixtures of CaAl2O4 and CoAl2O4. Finally, the as-prepared composite pigments are incorporated into organosilicon heat-resistance coating, and the heat-resistance of coating is obviously improved. |
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| Keywords: | composite pigment CoAl2O4 kaolin coloring mechanism heat-resistance coating |
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