摘要
通过共沉淀法制备了Co_(1-x)Mg_xAl_2O_4(x=0~0.8)系复合纳米粉体。采用XRD、TG-DSC、SEM、CIE-L*a*b*和UV-vis等测试技术对粉体的相组成、颗粒形貌、粒径、色度和吸光度等进行了表征。结果表明,制备的样品均为单一的尖晶石结构,置换离子成功地进入Co Al_2O_4结构中,并逐渐取代Co^(2+)离子在四面体中位置,致使晶格发生畸变,结晶度、粒径和色度发生变化。L*a*b*值分析显示,合成粉体在x=0.6时,得到最大的-b*值,表明蓝色值最大。UV-vis光谱分析表明,在530~670 nm范围内存在一系列较强吸收峰,这表明蓝色的形成。同时,在480 nm处的吸收峰的改变,影响色料粉体的亮度(L*值)。
Co_（1-x）Mg_xAl_2O_4（x ranges from 0 to 0.8） nano-pigments were prepared by co-precipitation method and characterized by means of TG-DSC, XRD, SEM, colorimetry and UV-vis. The XRD patterns showed that the obtained samples have single phase of cubic spinel structure. Metal ions were incorporated within the Co Al_2O_4 structure and gradually replaced the Co^（2＋） ions in the tetrahedral positions, which yielded a crystal lattice distortion and made crystallite, the particle size and color tone changed. The chromatic data revealed that the most b＊ value in negative occurs for x=0.6, indicating a highest blue intensity. Uv-vis pattern showed that a continuously strong absorption peaks were depicted in the range 430 ~ 670 nm, which revealed the formation of a blue color. Meanwhile, the absorption bands around 480 nm have a great influence on the lightness of pigments.
作者
李云
张垠
周念莺
LI Yun ZHANG Yin ZHOU Nianying(College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China)
出处
《中国陶瓷》
CAS
CSCD
北大核心
2016年第9期75-79,共5页
China Ceramics
基金
江苏高校优势学科建设工程资助项目
