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PRILIPKO SERGEYFACULTY OF ECOLOGY AND CHEMICAL TECHNOLOGIESThe theme of master's work: Investigation of oxygen nonstoichiometry of lanthanum manganiteScientific advisors:Dr. Chem. Sci. Professor Prisedsky V. V.Cand. Chem. Sci. Senior Lecturer Vinogradov V. M. |
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I was born july 3 1983 in Donetsk, Ukraine.
Parents:
Father- Prilipko Jury was born in 1950 in Enakievo Donetsk state. In 1972 finished Donetsk Polytechnical Institute, as a chemist - technologist. Cand. Chem. Sci. Works in Scientific and technical center NASU Reactivelectron.
Mother - Prilipko Lydia was born in 1958 in Prokopievsk, Kemerovo state, in 1981 finished chemistry-technological technical school. Works in technical service group of Central administrative board of the Ministry of Emergency Measures of Ukraine in Donetsk area, the staff inspector of group, works with the personnel.
In 1990 I went to 1-st class of school ¹51 in Donetsk. After eight classes passed in school ¹64. Had ended 11 classes in 2000. During studying at school I participated in Olympiads on mathematics, geography, history, chemistry, won command and personal competition of Kujbyshev district on a chess among schools. When I finished school I got the certificate with “fives” and only three “fours”.
After I finished school in 2000, I decided continue to study in Donetsk State Technical University on faculty of ecology and chemical technologies on a speciality " Technology of refractory nonmetallic and silicate materials ". In 2004 I got bachelor qualification in chemical technology and engineering and has made the decision to continue studying to become the master.
The choice of mine research work's theme was defined by an urgency and novelty of researches of lanthanum manganites, which began in 1995 when was detected in them effect of colossal magnitoresistance – abrupt decrease of electric resistance in a magnetic field. The further researches have allowed to raise temperature of colossal magnitoresistance up to room, that makes manganites the alternative of multilayered magnetic films as to a basis of information technics. The temperature interval, susceptibility to a magnetic field and size of magnitoresistance depend on type and the concentration of alloying additives, oxygen nonstoichiometry and conditions of synthesis. The aim of my work was measurements of oxygen nonstoichiometry, that is the reason of the mixed degree of oxidation of the manganese, resulting to occurrence magnitoresistance effect. Measurements were taken by a method thermogravimetry in an interval temperatures from room temperature up to 1250 îÑ. The offered method of synthesis allows to lower temperature of sintering from 1400 – 1600 îÑ to 1250 îÑ. The opportunity of use potentiometrical analysis for measurements of fullness of synthesis lanthanum manganates has been investigated. Advantages of this method in comparison with X-raying consists in its cheapness, it is rather easy and fast. Besides the basic theme, I has investigated kinetic and structures of diffusion zone in high-temperature oxidation of copper, and also has studied influence of structure and technological parameters on magnetic properties of manganese - zinc ferrites. On results of researches work, 5 reports (including 4 – at the international conferences) and two articles in scientific journals have been published.