(AgSt)_(1-x)/(AgI)_x复合颗粒的制备及其性能研究  

Study on the Synthesis and Properties of (AgSt)_(1-x)/(AgI)_x Composite Grains

作　　者：林海莉[1] 曹静[1] 

机构地区：[1]淮北煤炭师范学院化学与材料科学学院,淮北235000

出　　处：《信息记录材料》2009年第1期16-20,共5页Information Recording Materials

基　　金：安徽省教育厅自然科学基金(KJ2008B64ZC;KJ2008B100ZC);安徽省高校青年教师科研资助计划项目(2008jq1073)

摘　　要：分别以碘化钾（KI）为碘源以及硬脂酸银（AgSt）为本体，用原位法合成了负载型的（AgSt）1-x／（AgI）。复合颗粒。利用红外光谱仪（FTIR）、扫描电子显微镜（SEM）、紫外-可见漫反射光谱仪（UV—Vis）、X射线衍射仪（XRD）以及差示扫描量热仪（DSC）对复合颗粒的微观结构、形貌、光吸收、晶型以及热相变行为进行了表征。结果表明，（1）（AgSt）1-x／（AgI）x复合颗粒由本体AgSt颗粒及其表面上负载的尺寸为30-50nm的AgI粒子构成；（2）相对于AgSt，（AgSt）1-x／（AgI）x复合颗粒的光谱吸光范围从265nm拓展到425nm左右，是由AgI的吸收造成；（3）（AgSt）1-x／（AgI）x复合颗粒在82～88℃左右就出现第一相变蜂，显著低于本体AgSt的122．9℃，体现了AgSt与AgI两相界面的作用。The supported （AgSt）1-x/ （AgI）x composite grains were synthesized via in situ method, in which KI and AgSt was respectively used as iodic source and substrate. The microstructure, morphology, light absorption, crystal form and thermal behavior of （AgSt）1-x/ （AgI）x composite grains were respectively measured by fourier transform infrared spectroscopy （FTIR）, scanning electron microscopy （SEM）, ultraviolet visible spectros-copy （UV-Vis）, X- ray diffraction （XRD） and differential scanning calori.metry （DSC）. The results show that （1） （AgSt）1-x （AgI）x composite grains were composed of substrate AgSt and surface supported AgI particles with sizes ranging from 30 to 50 nm; （2） the light absorption range of （AgSt）1-x （AgI）x was broadened from 265 nm to 425 nm relative to pure AgSt, mainly originated AgI of （AgSt）1-x （AgI）x; （3） the first phase transition peak appeared at 82-88 ℃ for （AgSt）1-x/ （AgI）x composite was remarkably lower than 122. 9 ℃ for pure AgSt, which embodied the role of interface between AgSt and AgI phases.

关 键 词：硬脂酸银 碘化银 复合颗粒 光敏热成像材料 

分 类 号：O64[理学—物理化学]