摘要
Nano-MnFe2O4 particles were synthesized by co-precipitation phase inversion method and low-temperature combustion method respectively, using MnCl2, FeCl3, Mn（NO3）2, Fe（NO3）3, NaOH and C6H8O7. X-ray diffraction （XRD）, transmission electron microscope （TEM）, Fourier transform infrared spectroscopy （FT-IR）, thermogravim-etry-differential thermal analysis （TG-DTA） and differential scanning calorimetry （DSC） were used to characterize the structure, morphology, thermal stability of MnFe2O4 and its catalytic performance to ammonium perchlorate. Results showed that single-phased and uniform spinel MnFe2O4 was obtained. The average particle size was about 30 and 20 nm. The infrared absorption peaks appeared at about 420 and 574 cm-1, and the particles were stable below 524 ℃. Using the two prepared catalysts, the higher thermal decomposition temperature of ammonium perchlorate was decreased by 77.3 and 84.9 ℃ respectively, while the apparent decomposition heat was increased by 482.5 and 574.3 J？g？1. The catalytic mechanism could be explained by the favorable electron transfer space provided by outer d orbit of transition metal ions and the high specific surface absorption effect of MnFe2O4 particles.
Nano-MnFe2O4 粒子被一起沉淀阶段倒置方法和低温度的燃烧方法分别地综合，用 MnCl2， FeCl3， Mn (NO3 ) 2， Fe (NO3 ) 3， NaOH 和 C6H8O7。X 光检查衍射(XRD ) ，传播电子显微镜(TEM ) ， Fourier 变换红外线的光谱学(英尺红外) ， thermogravimetry 微分的热分析(TG-DTA ) 和微分扫描热量测定(DSC ) 被用来描绘结构，形态学， MnFe2O4 的热稳定性和它的催化表演到铵高氯酸盐。结果证明 single-phased 和一致尖晶石 MnFe2O4 被获得。平均粒子尺寸是大约 30 和 20 nm。红外线的吸收山峰在大约 420 和 574 cm1 出现了，并且粒子在 524 瑣潩 e
基金
Supported by the National Natural Science Foundation of China （90305008, 51077072）.
