新法简易制备单相NaZr_2(PO_4)_3纳米晶

以ZrOCl2.8H2O和Na3PO4.12H2O为原料,在表面活性剂聚乙二醇(PEG)-400的存在下,先通过在室温下充分研磨反应混合物进行固相反应,然后将混合物在60℃下保温4 h,接着用去离子水洗去混合物中的可溶性无机盐并于100℃下干燥,即得纳米晶NaZr2(PO4)3的前驱体,将前驱体煅烧可得NaZr2(PO4)3纳米晶。前驱体和它的煅烧产物通过TG/DTA,IR,XRD和UV-vis表征。结果表明,500℃下煅烧2 h得到的产物为无定形结构,700℃下煅烧2 h得到具有高结晶度的六方晶系结构的NaZr2(PO4)3空间群R-3c(167)],其平均一次粒径为39 nm。

Preparation of single phase nanocrystalline NaZr2 (PO4 )3 via a simple and novel method

The precursor of nanocrystalline NaZr2(PO4)3 was obtained by grinding fully ZrOCl2·8H2O and Na3PO4·12H2O in the presence of surfactant polyethylene glycol(PEG)-400 via a solid-state reaction at room temperature,maintaining the mixture at 60 ℃ for 4 h,and then washing the mixture with deionized water to remove soluble inorganic salts,and at last drying at 100 ℃.The nanocrystalline NaZr2-(PO4)3 was obtained by calcining the precursor.The precursor and its calcined products were characterized using TG/DTA,IR,XRD and UV-vis.The results showed that the calcined product obtained at 500 ℃ for 2 h was a compound with amorphous structure.However,when the precursor was calcined at 700 ℃ for 2 h,high crystallization NaZr2(PO4)3 with hexagonal structure space group R-3c(167)] was obtained with an average particle size of 39 nm.