文献类型：期刊文章

作　　者：汪国忠[1] 张立德[1] 牟季美[2]

机构地区：[1]中国科学院固体物理研究所,合肥2300312 [2]中国科学技术大学材料科学与工程系,合肥230026

出　　处：《物理化学学报》

基　　金：国家重大基础研究"攀登"基金

年　　份：1997

卷　　号：13

期　　号：5

起止页码：445-448

语　　种：中文

收录情况：AJ、BDHX、BDHX1996、CAS、CSCD、CSCD2011_2012、EBSCO、IC、INSPEC、JST、PUBMED、RCCSE、RSC、SCI-EXPANDED(收录号：WOS:000207601500011)、SCIE、SCOPUS、WOS、ZGKJHX、核心刊

摘　　要：Uniform nanosized NiO particles were prepared by a chedrical coprecipitation usingNiCl2.6H2O as the starting material. The relationship between various annealing telnperaturesand grain size of NiO crystallite was investigated. Optical reflectivity spectra of Nanometer-sizedNiO powders at roonl temperature were studied. The results show that seven optical absorptionbands (P1. P2. P3. P4. P5. P6 and P7) with the peak energies of 3.30, 2.99, 2.78, 2.25,1.92, 1.72 and 1.07eV, respectively, are located on a continuous refiectivity background. P1.P2. P3 and P4 exhibit "blue shift", but P5. P6 and P7 present "red shift"in comparison withthat of single crystal NiO. The continuous reflectivity background increases rapidly with increasingthe annealing temperature from 500℃ to 600℃ to 700℃. The origins of P1 to P7 and thereasons of "blue shift", "red shift" and the increase of the reflectivity background with increasingthe annealing temperature have been analyzed in detail.

关 键 词：共沉淀 光吸收 红移 蓝移 氧化镍 纳米材料  

分 类 号：O48] O614.813[物理学类]