低温燃烧合成Ce_(1-x)Pr_xO_2红色稀土颜料的呈色性能的研究  

Study on Chromatic Performance of Ce_(1-x)Pr_xO_2 Red Lanthanide Pigment Prepared by Low-Temperature Combustion Synthesis

作　　者：朱振峰[1] 王若兰[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,咸阳712081

出　　处：《硅酸盐通报》2005年第2期21-23,共3页Bulletin of the Chinese Ceramic Society

基　　金：陕西省教育厅资助项目(03jc11).

摘　　要：以Ce(NO3)3·6H2O,Pr6O11为主要原料,用低温燃烧合成法在250℃左右点火,合成了从粉红、红色直至棕红的一系列Ce1-xPrxO2(0.01≤x≤0.50)红色稀土颜料。用XRD,CIELab色度仪对产物进行了测试分析,研究了Pr掺杂量、保温温度及时间对其呈色性能的影响。结果表明:不同的Pr掺杂量对该Ce1-xPrxO2红色稀土颜料色度值和主波长均有影响。掺杂后Pr进入CeO2晶格,从而使该颜料呈现出一系列红色。在不同温度下对低温燃烧合成颜料进行热处理,随温度升高,其色度值a*增加,明度值L*降低,颜色逐渐变深,主波长增加。在1200℃下,对该颜料进行不同时间的保温,发现保温2h的呈色性能最佳。A series of praseodymium-doped ceria red pigments was prepared from cerium(Ⅲ) nitrate hexahydrate and praseodymium oxide (Pr6O11) at ignition temperature 250℃by low-temperature combustion synthesis(LCS). The color of Ce1-xPrxO2 pigment obtained varied from pink, red to brown hues, which are based on the amounts of praseodymium. The crystal structure of prepared pigment was investigated by X-ray diffractometry(XRD). The variation of chromatic coordinates and primary wavelength of the pigment were determined. In this study, the influence of praseodymium content,holding temperature and time on the chromatic coordinates of the prepared samples was studied. There is relation between chromatic coordinates, primary wavelength and praseodymium content. The results show that praseodymium enters into the ceria lattice and forms Ce1-xPrxO2 solid solution which are based on the fluorite structure. Therefore, Ce1-xPrxO2 pigment produced the attractive red and pink tonalities. With increase of the holding temperature, the a*and primary wavelength increase and L*decreases. Under the given temperature and different holding time, Ce1-xPrxO2 pigment has the excellent chromatic performance at 1200℃for 2h.

关 键 词：稀土颜料 呈色性能 CE1-XPRXO2 合成方法 稀土元素 掺杂量 温度 

分 类 号：TQ620[化学工程—精细化工]