摘要
采用四乙氧基硅(TEOS)为硅包膜剂,在SrAl2O4:Eu2+,Dy3+发光颜料颗粒表面进行包膜,通过扫描电镜(SEM)、粒度测量、BET比表面积测试及X射线光电子能谱(XPS)分析,证实发光颜料颗粒表面包覆了一层厚度约为14nm的致密均匀的SiO2纳米膜.耐水性能及发光性能测试表明,包膜后发光颜料耐水性明显改善,发光性能变化较小.分析表明包膜过程实际上是水合二氧化硅在颜料颗粒表面的溶胶-凝胶过程,其最佳工艺条件为:包膜溶液pH约为10;包膜温度控制在80℃;包膜时间为3.0h.
Silica encapsulation was studied on the particle surface of aluminate-based luminescent pigment by using TEOS as the raw materials. The encapsulated particles were analyzed by SEM, diameter testing, BET surface area measurement and XPS, a dense SiO2 film formed on particle surface with the thickness of 14nm. The anti-water property and luminescent characteristics measurement show that encapsulated particles have a better anti-water performance and similar luminescent properties to non-encapsulated particles. Moreover, the encapsulation procedure was analyzed and the process parameters' effect on coating film was also researched. The results show that the encapsulation procedure is actually a kind of sol-gel procedure Of SiO2 (.) nH(2)O on the surface of particles and its process is optimized as following: pH of encapsulation solvent is about 10, encapsulation temperature is at 80degreesC and reaction time is about 3.0.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第6期1373-1378,共6页
Journal of Inorganic Materials
关键词
发光颜料
包膜
溶胶-凝胶
铝酸盐
luminescent pigment
encapsulation
sol-gel
aluminate
