矿化剂氟化锂对镨锆黄陶瓷色料的影响

Effect of mineralizer lithium fluoride on praseodymium-zirconium-yellow ceramic pigment

谱锆黄陶瓷色料由于呈色稳定,价格较低廉已成为高温陶瓷色料市场的宠儿,但传统固相法所制备的谱锆黄陶瓷色料煅烧温度高(>1 600℃),导致颜料粒径过大影响呈色性能,因此,降低合成温度减小粒径已成为这一方向的研究的热点.本文利用八水合氧氯化锆、正硅酸乙酯、稀土氧化镨为主要原料,采用溶剂热法制备镨锆黄粉体颜料前驱体,加入不同含量的矿化剂氟化锂(LiF)以降低合成温度,对其在1 100℃煅烧,保温50 min获得镨锆黄陶瓷粉体颜料.采用色度分析仪、粒度分析仪、紫外可见光光谱分析仪、扫描电镜和X射线衍射分析技术对样品结构和性能进行表征.实验结果表明:当矿化剂LiF含量为0.35%时,样品中的ZrSiO_4结晶度较高,颗粒尺寸分布较小且较均匀,样品在400~480 nm蓝紫光有非常强的吸收,呈现较纯正的黄色色调,其色度值为L~*=84.92,a~*=4.70,b~*=68.00.该谱锆黄陶瓷色料可望应用于陶瓷喷墨打印技术领域.

Due to its stable color and low price,zirconium yellow ceramic pigment has become the favorite of high temperature ceramic pigment market. But the synthesis temperature of zirconium yellow ceramic pigment prepared by the traditional solid phase method is high（ 1 600 ℃）,resulting in the too large particle size of pigment and thus poor color performance. Therefore,reducing the synthesis temperature for the decrease in the particle size of the pigment has become a research hotspot. In the paper,zirconium praseodymium yellow pigment precursor is prepared by a solvothermal method using zirconium silicate,tetraethyl orthosilicate and praseodymium oxide as the main raw materials,then added LiF with various concentrations to reduce the synthesis temperature. The yellow pigment was obtained at 1 100 ℃ for 50 min. The colorimeter,particle-size analyzer,ultraviolet visible light spectrum analyzer,scanning electron microscope（ SEM） and X-ray diffract analysis（ XRD） are utilized to characterize the properties and microstructure of the samples. The results show that compared with other samples,the sample with 0. 35% LiF concentration has the higher crystallinity,smaller and more uniform particle size,resulting in the stronger absorption at 400 480 nm for the blue and purple light. Therefore,the sample with 0.35% LiF concentration exhibits a pure yellow hue of L＊= 84. 92,a＊= 4.70,b＊= 68.00,which is promising for applicationin ceramic inkjet printing technology in the future.