以单晶片状氧化铝为基材包覆二氧化钛银白珠光颜料的制备

Preparation of Silver White Pearlescent Pigment by Coating Single Crystal Flaky Alumina Substrate with Titanium Dioxide

以单晶片状氧化铝为基材,采用液相沉积法将TiO_2包覆Al_2O_3制备银白珠光颜料。通过扫描电镜(SEM)、激光粒度仪、刮涂卡表征等检测方法,系统考察了包覆过程中反应pH值、钛液包覆率、反应温度、煅烧温度等参数对银白珠光颜料光泽性能的影响。实验结果表明:当体系pH值约为2,温度约为80℃,加料速度为0.6 g/min,钛液包覆率为30.5%,煅烧温度为800℃时制备TiO_2包覆Al_2O_3银白珠光颜料具有较好的光泽和白度。

Silver white pearlescent pigment was prepared by coating single crystal flaky alumina substrate with titanium oxide through liquidphase deposition. By scanning electron microscopy （SEM）, laser particle size analyzer, scratch card and other characteristic methods, theeffects of pH, the titanium liquid coating ratio, reaction temperature, and calcination temperature on the properties of silver white pearlescentpigment luster are explored. The experiment results show that the best luster and whiteness of TiOJA1203 silver pearlescent pigment are obtainedwith the titanium coating rate being 30.5 %, the pH at around 2, the feeding speed at 0.6 g/min and the calcinating temperature at 800 ℃.