纳米高近红外反射颜料制备工艺研究  

Preparation of High Near-infrared Reflective Nano Pigments

作　　者：张潇予[1,2] 张玉军[1,2] 龚红宇[1,2] 王翠玲[1,2] 赵新巧[1,2] 朱洪立[1,3] 

机构地区：[1]山东大学材料液固结构演变与加工教育部重点实验室,济南250061 [2]山东大学特种功能聚集体材料教育部重点实验室,济南250061 [3]中国兵器工业集团第五三研究所,济南250031

出　　处：《人工晶体学报》2013年第3期482-486,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51072099)

摘　　要：采用柠檬酸溶胶-凝胶法制备了纳米高近红外反射颜料,研究了Fe/Cr摩尔比、水解温度、溶液金属离子浓度、pH值、煅烧温度等因素对凝胶时间及试样性能的影响。结果表明,在Fe/Cr摩尔比为0.50,水解温度70℃,溶液金属离子浓度为2.5～3.5 mol/L,pH=3～4,煅烧温度为900℃保温60 min的条件下,制备颜料的主晶相为Cr1.3Fe0.7O3,近红外波段范围内(700～2500 nm)其平均反射率可达到77.58%,晶粒尺寸在50～200 nm之间。High near-infrared （NIR） reflective nano pigments were prepared by the citric acid sol-gel method. The effects of molar ratio of Fe and Cr, hydrolysis temperature, pH value, concentration of metal ions and calcination temperature on gel time and reflective performance were investigated. The results showed that with Fe/Cr molar ratio of 0.50, hydrolysis temperature of 70℃, pH value of 3-4, metal ion concentration of 2.5-3.5 mol/L and calcination temperature of 900 ℃, the main crystalline phase of the as-prepared pigments is Cr1.3Fe0.7O3 whose average reflectance is 77.58% in the wavelength ranging from 700 nm to 2500 nm, and grain size is between 50 nm to 200 nm.

关 键 词：溶胶凝胶 近红外 反射 颜料 

分 类 号：TB321[一般工业技术—材料科学与工程]