The chromate nanoparticles such as CoCr2O4, NiCr2O4, CuCr2O4, and ZnCr2O4 were prepared by a modified sol-gel method. The structural and morphological properties of the chromate nanoparticles were characterized by X-ray diffraction (XRD) and a scanning electron microscope (SEM). The catalytic effects of chromates on the thermal decomposition of fine ammonium perchlorate (FAP) and hexanitrohexaazaisowurtzitane (CL-20) were studied by the TG-DTG measurements. Results show that the addition of CoCr2O4, NiCr2O4, CuCr2O4, and ZnCr2O4 nanoparticles makes the activation energies for the thermal decomposition of FAP decrease by 93.9, 94.0, 83.1, and 67.0 kJ·mol-1, and the thermal decomposition temperatures decrease by 45.0, 24.9, 57.7, and 38.8 K respectively. On the other hand, a similar trend exists in the case of the thermal decomposition of CL-20. Therefore, the addition of nanochromates shows high catalytic efficiency on the thermal decomposition of both FAP and CL-20 components, which would be beneficial to promote the burning rate of propellants containing FAP and CL-20 components.

中文翻译：

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纳米铬酸盐MCr2O4（M = Co，Ni，Cu，Zn）：精细AP和CL-20的制备，表征和对热分解的催化活性。

通过改进的溶胶-凝胶法制备了铬酸盐纳米颗粒，如CoCr2O4，NiCr2O4，CuCr2O4和ZnCr2O4。通过X射线衍射（XRD）和扫描电子显微镜（SEM）表征了铬酸盐纳米颗粒的结构和形态特性。用TG-DTG法研究了铬酸盐对高氯酸铵（FAP）和六硝基六氮杂异纤锌矿型结构烷烃（CL-20）热分解的催化作用。结果表明，添加CoCr2O4，NiCr2O4，CuCr2O4和ZnCr2O4纳米粒子可使FAP热分解的活化能降低93.9、94.0、83.1和67.0 kJ·mol-1，热分解温度降低45.0， 24.9、57.7和38.8K。另一方面，在CL-20的热分解的情况下，存在类似的趋势。