PEG对溶液燃烧合成超细ZrO_2粉末的影响

Effect of PEG on solution combustion synthesis of superfine ZrO_2 powders

以硝酸锆-尿素为原料,采用溶液燃烧合成法制备了超细ZrO2粉末,着重考察了聚乙二醇(PEG)对溶液燃烧合成过程及合成产物的影响。结果发现,在前驱体溶液中添加PEG,不改变合成ZrO2粉末的晶型结构,但可以明显改善合成粉末的分散性。因此,PEG可以作为溶液燃烧合成超细ZrO2粉末的有效分散剂。而且,在前驱体溶液中采用大小分子量匹配加入的方式,可使PEG的分散作用效果得到更好的发挥,从而可合成分散性好、粒径小于100nm的ZrO2粉末材料。

Superfine ZrO2 powders were synthesized by solution combustion synthesis （SCS） technology, taking Zr （NO3） 4-urea as raw materials. The influence of PEG on combustion synthesis process and the crystal structure, gain size and morphology of the synthesized ZrO2 powders were systemically studied. The results show that PEG is an effective dispersant agent for the synthesis of ZrO2 by SCS. The crystal structure of ZrO2 is invariant in the process. Further more, more dispersive ZrO2 powders with a size of less 100nm have been successfully synthesized by adding mixed micromolecule and macromolecule PEG in the precursor solution.