New insights in nano-copper chromite catalyzing ultrafine AP:Evaluation of dispersity and mixing uniformity

扫码查看

原文链接

万方数据
维普

外文摘要：Improving the application of nanomaterials has always been a research hotspot in the field of energetic materials(EMs)due to their obvious catalytic effect on the EMs,especially the uniformly dispersed nanomaterials.However,few studies have reported the dispersion of nanomaterials.In this study,the dispersity and mixing uniformity of nano-CuCr2O4 was evaluated based on the difference of solid UV light absorption between the nano-catalytic materials and EMs.The nano-CuCr2O4/ultrafine AP com-posites with different dispersity of nano-CuCr2O4 were prepared by manual grinding and mechanical grinding with different grinding strength and griding time.And then,the absorbance of different sam-ples at 212 nm was obtained by solid UV testing due to the high repeatability of the absorbance at 210-214 nm for three parallel experiments,and the dispersity of different samples was calculated through the established difference equation.Furthermore,the samples were characterized by XRD,IR,SEM,EDS,DSC and TG-MS,which confirmed that different mixing methods did not change the structure of the samples(XRD and IR),and the mixing uniformity improved with the increase of grinding strength and grinding time(SEM and EDS).The scientificity and feasibility of the difference equation were further verified by DSC.The dispersity of nano-CuCr2O4 exhibits a positive intrinsic relationship with its catalytic performance,and the uniformly dispersed nano-CuCr2O4 significantly reduces the thermal decomposi-tion temperature of ultrafine AP from 367.7 to 338.8 ℃.The TG-MS patterns show that the dispersed nano-CuCr2O4 advanced the thermal decomposition process of ultrafine AP by about 700 s,especially in the high temperature decomposition stage,and the more concentrated energy release characteristic is beneficial to further enhance the energy performance of AP-based propellants.The above conclusions show that the evaluation method of dispersity based on solid UV curves could provide new ideas for the dispersity characterization of nano-catalytic materials in EMs,which is expected to be widely used in the field of EMs.

外文关键词：

Nano-CuCr2O4Ultrafine APDispersityUV-Vis diffuse reflectance spectroscopyThermal decomposition

作者：

Yong Kou、Peng Luo、Lei Xiao、Yanping Xin、Guangpu Zhang、Yubing Hu、Junqing Yang、Hongxu Gao、Fengqi Zhao、Wei Jiang、Gazi Hao

展开 >

作者单位：

National Special Superfine Powder Engineering Research Center of China,School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology.Nanjing,210094,China

Xi'an North Huian Chemical Industry Co.Ltd,Xi'an,710302,China

Xi'an Modern Chemistry Research Institute,Xi'an,710065,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaJoint Funds of the National Natural Science Foundation of ChinaNatural Science Foundation of Jiangsu ProvinceFundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central UniversitiesYoung Elite Scientists Sponsorship Program by CAST

项目编号：

2180513921905023121021942200514422005145U2141202BK2020047130920041106309210112032021QNRC001

出版年：

2024

DOI：

10.1016/j.dt.2023.04.004

防务技术

中国兵工学会

防务技术

CSTPCD

影响因子：0.358

ISSN：2214-9147

年,卷(期)：2024.32(2)

参考文献量49