The Hugoniot Line Surveys Of Fe-O-S System

Knock-wave dynamic compression technique,which plays a very important role in scientific research on solid earth,has become one of the most important way in studying the composition,state,and physical properties of the Earth's interior substance.In this paper,the technique mentioned above is used to do experimental measurement to obtain the Hugoniot line of Fe-O-S mixture.Results obtained show excellent agreement with calculated data using volume additive law,the compressional curves of this mixture along Hugoniot and along 0 K isothermal were also calculated respectively according to the Hugoniot curve and 0 K isothermal relevant to the Ingredients,which showed both are consistent well.The above mentioned results provide a basis for investigating the candidate concentrations of Earth's outer core if a Fe-O-S assembly,for the further details.Based on the results of previous studies found that:in the field of nuclear temperature and pressure conditions,Fe90/08/S2 density than the density of low-field nuclear 2%;With the increased pressure gradually Fe90/08/S2 higher than the speed of sound velocity of nuclear field.Judging from the results,close to the core-mantle boundary is the oxygen-rich side of the field of nuclear systems;and near the inside and outside the nuclear field the nuclear side of the border,there may be sulfur-rich system.In order to verify the correctness of the above assumptions,the paper choice of sulfur-rich Fe-O-S system for the study sample,in which the content of O to 2.3%,Which the S content of 5.8%.At room temperature,Fe91.9/02.3/ S5.8 density 6.82g/cm3,under the same conditions than Fe90/O8/S2 high density 2%,and with Alfe(2002) to estimate the content of Fe91/02.5/S6.It is identified with Fe/O/S quality 92.5/2.2/5.3 percentage of the mixture as the test sample material.Ratio of selected samples in accordance with the design of the system to do the sample program,according to test results of samples making continuous improvement program,end-use 850℃-30MPa-60min heating mechanism,room temperature to 800℃that is basically in a state of non-pressure,When the temperature rose to 800℃after the pressure to 30Mpa,pressure rose to 850℃heat for 60 minutes,so the system as a sample program.Through the composition of the sample fluorescence test results,produced samples with our selected component is very close to.Light gas gun with two electric probes and anti-collision technology on the mixture of Fe-OS lines were measured Hugoniot,Hugoniot data obtained:CO= 3.71km/s,λ=1.61,ρ0=6.88 g/cm3 volume may be increased in accordance with the principle of the Hugoniot of the mixture of lines and OK isothermal compression line were estimated,as a result,experimental results with the very good compliance, the experimental results show that the credibility of an excellent.Volume may increase the applicability of the principle also shows that,in this experiment the pressure of the scope of the impact of Fe,FeO,FeS yuan each group there were no signs of chemical reaction.