共沉淀法合成Pr掺杂ZrSiO_4黄色颜料的研究

Synthesis of Praseodymium-doped Zircon Yellow Pigments by the Coprecipitation Method

采用液相共沉淀法,以ZrOCl_2·8H_2O、Na_2SiO_3·5H_2O和PrCl_3·7H_2O为主要原料,LiF为矿化剂,在830℃-950℃煅烧合成Pr掺杂ZrSiO_4黄色(镨黄)颜料。采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、分光测色仪等分别对制备的镨黄颜料样品的晶体结构、颗粒形貌与粒度、CIE L*a*b*颜色指数等进行表征。研究了Pr掺杂量和煅烧温度对合成颜料的影响。结果表明,通过优化Pr掺杂量和调整合成温度能在一定程度上控制镨黄颜料粒度与黄色饱和度。当Pr/Zr摩尔比0.06、合成温度为860℃时,制备的镨黄颜料呈色效果最佳。

P Praseodymium-doped zircon yellow pigments were synthesized by the liquid co-precipitation method,using ZrOCl2·8H2O,Na2SiO3·5H2O and PrCl3·7H2O as the raw materials and LiF as the mineralizer.The calcination temperature was arranged from 830°C to 950°C.The synthesized samples were characterized in terms of crystal structure,particle morphology and size,and CIE L*a*b*color indices by the X-ray Diffraction(XRD),Scanning Electron Microscope(SEM)and Color Measuring Spectrometer,respectively.The effects of the Pr doping content and the calcination temperature on the synthesized pigments were investigated.Results show that the particle size and yellow saturation of the pigments can be controlled by optimizing the Pr doping content and the calcination temperature.The praseodymium-doped zircon pigment prepared with 5wt%PrCl3·7H2O and calcined at 860°C for 2 h shows the best yellow coloring effect.