In order to study the chemical compatibility between the tracer markers and the water-gel explosives,the tracer markers(micron-sized particles of a rare earth element oxide)with 0,1％,3％and 5％mass fractions were added to the water-gel explosives.The microstructure,explosive properties and thermal decomposition characteristics of the water-gel ex-plosives were studied by scanning electron microscope,chronometer method,lead column compression method and synchro-nous thermal analysis technology,and the water-gel explosives were detected by X-ray fluorescence spectrometer.The results show that,as the mass fraction of the tracer marker increases from 0 to 5％,the microstructure of water-gel explosives,deto-nation velocity and fierceness do not change significantly,and thermal stability is always good.The variation range of detona-tion velocity and fierceness is about 1.0％and less than 5.0％,respectively.Both TG and DTG curves are basically the same for the four samples,namely,there is no obvious change in the thermal decomposition process.When the conversion rate is less than 40％,the activation energy of the sample without tracer marker is smaller than that of the other three samples with tracer marker added.And the activation energy of the four samples is close to that of the other three samples when the conver-sion rate is increasing from 50％to 70％,especially when reaching 80％,which means that there is no obvious effect of trac-er marker added on the stability of thermal decomposition of water-gel explosives.The peak of the X-ray spectrum is the most obvious under the excitation conditions of 0.1 mA and 50kV for X-ray fluorescence spectrometer,and the water-gel explosives with a mass fraction of 0.05％tracer marker is added,which is of 597394CPS for count rate.The results indicate that the addition of a tracer marker with a mass fraction of 0.05％to hydrocolloid explosives can meet the requirements of tracer secu-rity inspection.
万方数据
维普
