摘要
用化学共沉淀法制备ITO粉体。制备过程中,分别将NH_4Cl-NH_3H_2O、(NH_4)_2SO_4-NH_3H_2O和NH_4AC溶液作为缓冲溶液,保持反应过程中pH值基本不变。采用可溶性淀粉、PVP、十二烷基磺酸钠作为分散剂。借助XRD、TEM、BET及四探针电阻仪,研究缓冲溶液和分散剂对制得粉体的物相、形貌、分散性及导电性能的影响。结果表明:采用缓冲溶液制备出的粉体为单相In_2O_3粉体。采用NH_4AC作为缓冲溶液,用淀粉作为分散剂,当pH值为6~7时,所制粉体的粒径在10 nm左右,颗粒为立方体形,粒度均匀,分散性能好,电阻率相对较低。
ITO nanopowders were prepared by chemical co-precipitation.NH4Cl-NH3H2O,（NH4）2SO4-NH3H2O and NH4 AC solutions were used as buffer solution to remain the p H value unchanged;in the meantime,the powders were prepared with different dispersants.The effects of buffer solution and dispersant on phase structure,morphology,conductivity and the dispersion were characterized by XRD,TEM,Four point probe and BET.The results show that the powders prepared with the buffer solution is single-phase In2O3 structure.When it is prepared with NH4 AC as the buffer solution and soluble starches as the dispersant,in the p H range from 6 to 7,the powder of inerratic cubic shape possesses uniform particle size,good dispersibility,and lower electrical resistivity with about 10 nm particle size.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2017年第6期1714-1718,共5页
Rare Metal Materials and Engineering
基金
北京市自然科学基金(2142025)
