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Influence of synthesis conditions on the properties of FeXCoYOZ - nanoparticles in SiO2Sol-gel film

Sidsky V. V., Gaishun V. E., Demidenko O. M., Savitskaya T. A., Panykov V. V., Semchenko A. V.

Journal of Automation Mobile Robotics and Intelligent Systems

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2009

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Vol. 3, No. 4

91-92

EN

Synthesis conditions influence on structure of FexCoyOz - nanoparticle in SiO2 - sol-gel coating is discussed. The samples are synthesized by hybrid sol - gel method including following stages: TEOS hydrolysis, introduction into sol of Co(NO3)2 . 6H20 and Fe(NO3)3 . 9H20, deposition of film-forming sol by spin-coating on silica substrate, heat treatment at the temperature from 200 up to 900 °C. The Synthesis conditions influence on a specific structural property of sol gel films is investigated by AFM.

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Application of sol-gel process for preparation of functional materials

Gaishun V. E., Demidenko O. M., Kosenok Y. A., Kovalenko D. L., Semchenko A. V., Strek W.

Journal of Automation Mobile Robotics and Intelligent Systems

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2009

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Vol. 3, No. 4

121-123

EN

A development of high-performance materials for electronics, optics, ceramics fabrication is restrained by traditional modes of their production. Basic technologies for materials include high-temperature physical and chemical processes and require special conditions to attain desired properties of final products. Advanced preparation methods for materials with new features are feasible on the basis of colloid-chemical processes and nanochemistry. In this respect the sol-to-gel transformation followed by solidification and chemical modification are of great interest to attain a variety of different functional properties of materials.

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Silica gel glasses after laser irradiation

Shalupaev S. V., Semchenko A. V., Nikityuk Y. V.

Materials Science

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2003

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Vol. 21, No. 4

495-500

EN

The paper describes a 'combined' sol-gel process allowing us to fabricate large-sized silica glasses. A comparative analysis of the laser thermosplitting of fused and gel silica glasses is also presented. Basic characteristics and main specific features of the silica-gel glasses obtained are given. The distribution of thermoelastic fields in fused and gel-silica glasses after exposing them to laser thermosplitting is analyzed. Regularities in splitting silica glasses by the laser thermosplitting method have been found. To achieve reliable thermosplitting effects and stable dividing microcracks, special conditions are needed, favouring the formation of initiating microcracks.