钇复合氧化物颜料的制备与表征

通过尿素分解法，把三价铬离子掺入到钇铝石榴石Y₃Al₅O₁₂中，采用共沉淀法制备出绿色颜料。扫描电镜测试表明产物颗粒直径在200 nm左右，用XRD测试复合氧化物的结晶相行为，确定主相是钇铝石榴石相，用紫外可见漫反射光谱测试掺杂离子的配位状态和电子跃迁行为，用色度学测试氧化物颜色特征。将复合氧化物颜料颗粒与高分子聚丙烯共混，熔体纺丝，并通过北京同步辐射X射线CT对制得的纤维加以测试，结果表明复合氧化物颜料在高分子基质中得到良好的分散。这种颜料性能稳定，对环境友好，为实现无水印染技术奠定基础，减少纺织印染工业中所排放的污水。

Synthesis and Characterization of Chromium Doped Y3Al5O12 Compound Pigment

The authors synthesized a new kind of green pigment via co-precipitation method by doping Y3Al5O12 with Cr3+.The size of the pigment particles is around 200 nm as observed under scanning electron microscope.XRD results demonstrate that the pigment crystalline form of the pigment is yttrium alluminium garnet.UV-Vis spectra were used to investigate the coordination states and transition behavior of the doping ions.In addition,the colour feature was measured by CIE L*a*b* chroma value.The pigment was blended with polypropylene and then polypropylene fiber was produced using the polypropelene-pigment composite via molten spinning process.The distribution of the pigment particles in the polypropylene fibers was characterized by X-ray computed tomography(CT) technique on the Beijing synchrotron radiation facility.The result states that the composite oxide pigment particles are homogeneously dispersed in the polypropylene fibers.The pigments are stable,non-toxic to the environment.and may be applied in non-aqueous dyeing to reduce waste water emitted by textile dyeing and printing industry.