Investigation of the dependence of the electrical resistance of Iron powder on the compressive force

The purpose of the study is to establish the dependence of the electrical resistance of iron powder on the compression force. Methods . The electrical iron powder was placed in a sleeve. The sleeve is tightly closed on both sides by metal pistons protected from external sources of electrical resistance by dielectric spacers. A force F̅ is applied to one of the spacers. The strain gauge measures the amount of applied force, and the ohmmeter records the presence of electrical resistance and its amount in the circuit section. Using this setup, a full factorial experiment was conducted, during which the powder samples were changed, a 7-gram sample was taken, as well as a 14-gram sample, and the above parameters were monitored. In this case, the change in electrical resistance was chosen as an optimization criterion when assessing electrical conductivity in a circuit section. The results of the study showed an empirical dependence of the resistance of electrical iron powder on the change in pressure on it, by conducting a full factorial experiment. Thus, for the first time, new dependencies of the electrical resistance of iron powder on the compression force were obtained. This dependence shows that of the three factors under study, the greatest influence is exerted by the compression force, with an increase, the resistance decreases, a decrease in resistance is also observed with an increase in the bushing diameter, which models the diameter of the conductor cross-section. With this increase in the mass of the powder, the resistance increases, from which it can be concluded that with an increase in the length of the conductor, the electrical conductivity decreases. Conclusion . As a result of the experiments, it was found that the electrical iron powder changes its electrical resistance depending on the force applied to it, the diameter of the conductor and the mass of the compressed powder. Based on the results of the experiment, an empirical relationship was compiled between these factors.