超声波辅助分散法制备镨掺杂钛酸钙荧光效果珠光颜料

采用超声波辅助分散法在云母钛珠光颜料表面原位生成镨掺杂的钛酸钙，制备一种具有荧光效果的珠光颜料。分别采用荧光分光光度计、激光粒度分析仪、X射线衍射仪、冷场扫描电子显微镜和全自动色差计对所制备的样品进行表征。结果表明：在包覆率为5.3%、煅烧温度为900 ℃、煅烧时间为150 min的条件下获得的样品表面光滑平整、粒径分布均匀（平均粒径为24.34 μm）。该样品在太阳光下呈白色，其颜色特征参数（L^*，a^*，b^*）为（89.03，-1.29，1.00）。在304 nm紫外光激发下，样品的发射光谱主峰位于613 nm，呈红光发射，对应于Pr³⁺的¹D₂→³H₄跃迁，平均荧光寿命为154.50 μs。

Preparation of CaTiO3∶Pr3+ Pearlescent Pigments with Fluorescent by Ultrasonic-assisted dispersion

CaTiO₃:Pr³⁺ based pearlescent pigments with fluorescent were prepared by ultrasonic-assisted dispersion technique. The samples were characterized by fluorospectro-photometer, laser particle size analyzer, X-ray diffraction, scanning electron microscopy and automatic colorimeter, respectively. The results show that the sample obtained from TiO₂-mica pearlescent pigments with CaO coating ratio 5.3% and calcinating at 900 ℃ for 150 min gives a narrow particle size distribution (the average diameter is 24.34 μm) with a homogeneous, dense and smooth surface. It gives white color under the solar light. The characteristic color(L^*, a^*, b^*) of the sample is (89.03, -1.29, 1.00). The maximum emission wavelength is a red light of 613 nm under the excitation of ultraviolet at 304 nm, corresponding to the transition for ¹D₂→³H₄. The average fluorescent lifetime is 154.50 μs.