CHEMICAL TECHNOLOGY (inorganic and organic substances. Theoretical fundamentals)

OBTAINING AND PROPERTIES OF COMBINED POLYMERIC MATERIALS BASED ON THE 3,7,13,17-TETRAMETHYL-2,8,12,18-TETRAETHYL-5,15-BIS...

DOI: 
10.6060/tcct.20165911.5445

Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2016. V. 59. N 11. P. 84-91

OBTAINING AND PROPERTIES OF COMBINED POLYMERIC MATERIALS BASED
ON THE 3,7,13,17-TETRAMETHYL-2,8,12,18-TETRAETHYL-5,15-BIS(4-NITROPHENYL)-PORPHYRIN AND ITS COPPER COMPLEX

2016, Т. 59, № 11, Стр. 84-91

REDUCTION OF SODIUM DICHROMATE IN PRESENCE OF VEGETABLE COMPONENTS

DOI: 10.6060/tcct.20165911.5378
Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2016. V. 59. N 11. P. 77-83

2016, Т. 59, № 11, Стр. 77-83

DETONATION NANODIAMOND AS PROSPECTIVE COMPONENT OF COMPOSITE SOLID PROPELLANTS

In this articlethe the possibility of application of detonation nanodiamond (DND) as a prospective component of composite solid propellants (CSP) and additive approach to opti-mization of fuel compositions based on binary fuel compositions is considered. The introduc-tion to the fuel composition of DND allows creating a metal-free CSP with increased energy-to-mass characteristics. Usage of the additive approach for calculations when creating new prospective compositions of CSP allows reducing significantly the volume of work to optimize the fuel compositions and to simplify the process of thermodynamic engineering.

Key words: nanodiamond, solid rocket fuel, components, compositions, energy-mass and ballis-tic characteristics

REFERENCES
1. Danilenko V.V. Synthesis and sintetring of diamonds with explosion. M.: Energoatomizdat. 2003. 271 p. (in Russian).

2016, Т. 59, № 8, Стр. 96-100

EFFECT OF CHEMICAL TREATMENT ON PROPERTIES OF CARBON-MINERAL MATERIALS FROM SAPROPEL

We investigated the possibility of producing porous carbon-mineral materials based on sapropel, and also the variation of their textural characteristics and the chemical state of the surface by acidic, alkaline treatment and processing with water vapor. Prepared carbon-mineral-supported cobalt-molybdenum catalyst tested in the reaction of hydrotransformation of 2,4 – dibenzothiophene and α - methylnaphthalene.

Key words: sapropel, carbon - mineral materials, catalysts, hydroprocessing

REFERENCES
1. Braksh N.A. Sapropel sediment and the ways of their application. Riga: Zinatne. 1971. 282 p. (in Russian).
2. Dobretsov V.B. Russian sapropels: developing, application, ecology. StPb: GIORD. 2005. 200 p. (in Russian).
3. Titov E.I. Tr. sapropelevoiy laboratorii. 1951. N 5. P. 127-138 (in Russian).
4. Kovalenko T.A., Adeeva L.N. Khimiya v interesakh ustoiychivogo razvitiya. 2010. V. 18. N 2. P. 189-195 (in Russian).

2016, Т. 59, № 8, Стр. 90-95

INFLUENCE OF COPPER SUBLAYER ON NUCLEATION OF DIAMOND CRYSTALS ON SURFACE OF TUNGSTEN CARBIDE

The buffer copper sublayer on the surface of tungsten carbide was obtained with the chemical deposition from aqeous solutions. With the using the methods of SEM, AFM, XRF it was established that at temperature of 23 °C the layer structure is porous that do not ob-served at negative temperatures. The sublayer structure influences the character of nuclea-tion of diamond crystals and their form. The phase composition was determined with Raman spectroscopy. The spectrum shows the lines of diamond (1334 cm-1), sp2 of carbon and trans-polyacetylene (1170 сm-1).

Key words: copper sublayer, diamond film, tungsten carbide, cryochemical processing

REFERENCES
1. Stepanenko E.V. Development of scientific and technological principles of adhesive sublayers formation on hardmetal instrument for deposition of diamond coating. Candidate dissertation for engineering science. M.: National Research Technological University “MISIS”. 2011. 142 p. (in Russian)

2016, Т. 59, № 8, Стр. 85-89

DEVELOPING MANUFACTURING TECHNOLOGY OF COMPOSITE CATHODES WITH METHOD OF PRESSING PYROLYTIC GRAPHITE WITH TRIPLE CARBONATE

In this work a manufacturing technology for a composite cathode is described. In this cathode draphite and emission-active substance forms intercalated chemical compound. These cathodes were studied in a mode of field thermo electrone emission at temperatures of 0-1100  C and anode voltages of 1 – 15 kV. The article contains results of determination of optimal pressing parameters, different methods of cathode surface processing and field emission current-voltage characteristics.

Key words: vacuum electronics, nanostructured graphite materials, field emission, field emis-sion, composite cathode, ion etching

REFERENCES
1. Dresselhaus M.S., Dresselhaus G. Intercalation compounds of graphite. Advances in Physics. 2002. V. 51. P. 22. DOI:10.1080/00018730110113644
1. Antonov A.A. Lamellar –solid cathode and the method of its preparing. USSR Patient №1658756. 1991. P. 1-6 (in Russian)

2016, Т. 59, № 8, Стр. 81-84

RECEIVING AND PROPERTIES OF NEW NANO COMPOSITE CARBON MATERIALS

The effect of self-organization of diamond nanocrystallites in graphite and in the pol-ymer-like carbon films was discovered for the first time at deposition from vapors of ethanol of low pressure with the use of non-equilibrium high-ionized microwave plasma. The tech-nology of receiving nanocomposite diamond-graphite covers with adjustable thresholds of field emission in the range from 5-7 to 20 V/m and density of currents higher than 100A/cm2 was developed. The possibility of receiving of insular carbon coverings with super high surface density on crystals of silicon as well as the quasi-closed cellular macro cell structures with transparent graphene-like "windows" in the visible spectral range was shown.

Key words: self-organization, carbon nano structures, low temperature deposition, microwave plasma

REFERENCES
1. Yafarov R.К. Physics of MW vacuum-plasma nanotechnologies. M.: Fizmathlit. 2009. 216 р. (in Russian).

2016, Т. 59, № 8, Стр. 75-80

ELECTRICALLY CONDUCTIVE POLYCRYSTALLINE SUPER HARD MATERIAL BASED ON DIAMOND AND n-LAYER GRAPHENES

The electrical and physical properties of the electrically conductive super hard mate-rial on the basis of polycrystalline diamond and n-layered graphenes obtained at high pres-sures and temperatures were studied. It was established that the increase in graphene in a polycrystalline diamond compact leads to a sharp decrease in resistance. Wherein the hard-ness of the samples is slightly inferior to the hardness of diamond poly crystals obtained without the use of graphene.

Key words: diamond, graphene, high pressure, poly crystal, conductivity

REFERENCES
1. Tsay F.Y., Ananthanarayanan K.P., Gielisse P.J., Mitra S.S. J. Appl. Phys. 1972. V. 43. N 9. P. 3677–3682.
2. Vishnevskiy A.S., Gontar A.G., Torishniy V.I., Shul’zhenko A.A. FTP. 1981. V. 15. N 6. P. 1145–1149 (in Russian).
3. Ekimov E.A., Sidorov V.A., Bauer E.D., Mel'nik N.N., Curro N.J., Thompson J.D., Stishov S.M. Nature. 2004. V. 428. P. 542–545.

2016, Т. 59, № 8, Стр. 69-74

SUPPRESSION OF CVD DIAMOND GROWTH ON SIDE FACE OF SUBSTRATE IN PROCESS OF GAS-PHASE PRECIPITATION

CVD diamond grows on the all surfaces of the substrate, including the side faces. However, the diamond layer on side faces may be undesirable. We proposed and developed the method to suppress the CVD diamond growth on the side faces using silicon wells. The optimal geometric dimensions of the wells were determined. The studies of the structural quality of the CVD diamond films were carried out.

Key words: diamond, CVD diamond, diamond growth suppression

REFERENCES
1. Blank V.D., Bormashov V.S., Tarelkin S.A., Buga S.G., Kuznetsov M.S., Teteruk D.V., Kornilov N.V., Terentiev S.A., Volkov A.P. Power high-voltage and fast response Schottky barrier diamond diodes. Diamond and Related Materials. 2015. 57. P. 32–36. DOI: 10.1016/j.diamond.2015. 01.005.
2. Gippius A.A., Khmelnitsky R.A., Dravin V.A., Khomich A.V. Diamond–graphite transformation induced by light ions implanta-tion. Diamond and Related Materials. 2003. N 3-7 (12). P. 538–541. DOI: 10.1016/S0925-9635(02)00291-1.

2016, Т. 59, № 8, Стр. 64-68
Syndicate content