Development and research of the energy saving system of purification technological waters from ferromagnetic impurities and its automation

A mathematical model of the industrial water treatment process is built. The structural scheme of relationships of parameters of the process of extraction of ferromagnetic impurity is developed that has allowed to find the transitional characteristics, to carry out computer experiments and further to define the basic constructive parameters of the process. A study of the corresponding process was performed using the found transfer functions of the object through the control channels. A P-regulator has been developed for energy-efficient control of pollution concentration at the outlet of the treatment system. Based on experimental data and the developed transient characteristics, it is shown that the energy savings using the proposed regulator is at least 15%

Annealing Temperature Dependent Ferromagnetic Behaviors Observed in Highly Orientated Pure NiO Thin Films

Transition metal (TM) doped NiO is a promising candidate of p-type oxide diluted magnetic semiconductors (DMSs), which shows obvious room-temperature ferromagnetism. When researching the magnetic properties of DMSs, it is very important to get rid of ferromagnetic impurity phases by optimizing the preparation process. For this purpose, pure NiO thin films have been deposited by a pulsed laser deposition method and annealed by different annealing process. As-deposited or low-temperature annealed films show room-temperature ferromagnetism and high-temperature annealed films are not ferromagnetic. Nickel metal should be the origin of ferromagnetism in these thin films. On the other hand, high annealing temperature influences the microstructure of the film surface a lot. These results show a useful method to eliminate ferromagnetic impurity in NiO thin films and to optimize the preparation parameters of TM doped NiO thin films.