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Online since: April 2020
Authors: Yuri Petrovich Skachkov, Yerkebulan B. Mazhitov, Valentina Loganina
Assessment of the Structure of Polysilicate Binding with Added Glycerol Valentina Loganina1,a*, Yerkebulan Mazhitov1,b and Yury Skachkov1,c 1Street Titov,28, 440028, Penza, Russia aloganin@mail.ru, bmazhitov201090@gmail.com, crector@pguas.ru Keywords: polysilicate binder, glycerol, IR spectroscopy, sol, silicate paint Abstract.
The chemical structure of the polysilicate solutions obtained with the addition of glycerol was studied by IR spectroscopy.
When analyzing the IR spectra of polysilicate solutions, characteristic bands and absorption peaks were found, which correspond to both their qualitative composition and the effect of glycerol addition on the structure of the binder.
Pigment&Resintechnology. 39 (6) (2010) 315-321 [6] P.Ailer, Chemistry of silica.
Mazhitov, Structure and Properties of the Modified Binding for Silicate Paints, Materials Science Forum. 931 (2018) 469-474 [9] V.I.
Online since: May 2011
Authors: Yi He Li, Qing Ling Fang, Chun Yu Wang, Wen Sen Chang, Xiao Dong Li
Synthesis of UV Curable Polymethylsilane by a One-step Wurtz Route LI YiHea, FANG QingLingb, WANG ChunYuc, CHANG WenShengd and LI XiaoDonge Department of chemistry and Biology, School of Science, National University of Defense Technology, Changsha 410073, China ayihenim@gmail.com, bfql2521@hotmail.com, cnudt001@126.com, d71932870@qq.com, exdli0153@sina.com Keywords: preceramic polymer, polymethylsilane, vinylic polymethylsilane, softlithography Abstract.
UV curable vinylic polymethylsilane (v-PMS) was synthesized by a facile one-step Wurtz route, the products’ molecular structures were characterized by FT-IR and the mechanism of the chemical reactions was discussed in detail.
The as-synthesized product was a promising candidate for the fabrication of micro ceramic structures for microfluidics by softlithography techniques.
To our best knowledges, there are only a few researches focused on UV curable PMS as a preceramic polymer for ceramic micro-structures.
The molecular structures were investigated by Nuclear Magnetic Resonance Spectra (Bruker DMX600) with CDCl3 as a solvent, Fourier Transform Infrared (FT-IR, Mattson Genesis II Spectrometer).
Online since: September 2013
Authors: Sarawut Thountom, Thanawat Klaytae
Introduction Strontium titanate (SrTiO3; ST) is a non-conducting, quantum paraelectric [1] material with cubic perovskite structure.
The XRD pattern was showed that the ST samples were in crystalline structure to the cubic SrTiO3 from the 350734 card of the powder diffraction file database.
At 10% chitosan solution adding, its peak showed ST crystalline structure to the tetragonal Sr2TiO4 occurred together.
It was found that chitosan solution addition played an important in the structure and morphology of the obtained SrTiO3 powder.
Dissertation, Department of Chemistry, University College London, 2011, p. 269
Online since: July 2011
Authors: O.D. Osahon, O.D. Nworgu
The concentration of Vanadium and Nickel in crude oil is several thousand times what would be expected if these elements were not complex to the organic structures [6].
Journal of Radioanalytical and Nuclear Chemistry,198 (1) (1995) 17-22
Becker, Trace and ultra trace analysis in liquids by Atomic Spectrometry,TrAC Trends in Analytical Chemistry Vol. 24 (3) (2005) 243 – 254
Malcolm, Flame spectrometry in environmental chemical analysis: A practical guide, The Royal Society of Chemistry U.K. 1994
Ademoroti, Environmental Chemistry and Toxicology.
Online since: November 2024
Authors: Wanisa Abdussalam-Mohammed, Moussa Khlifa, Valeria Arrighi, Ahmed Zaed, Arno Kraft
This leads us to conclude that the reinforcement effect is largely determined by the 3-dimensional network structure of polymer and filler, and therefore related to the silica content.
Rubber chemistry and technology. (1993), 66(2), pp.178-195
Journal of Polymer Science Part A: Polymer Chemistry. (2007), 45(17), pp.3818-3832
Polymer Chemistry. (2020), 11(11), pp.1830-1844
Journal of Polymer Science Part A: Polymer Chemistry.(2019), 57(3), pp.216-227
Online since: June 2012
Authors: Jian Peng Wu, Jian Feng Huang, Li Yun Cao, Ying Sun
The effect of acticarbon on the structure and charge-discharge property of LiFePO4 crystallites was investigated.
The influence of acticarbon on the structure and electrical properties of the LiFePO4 powders was particularly investigated.
This indicated that the added acticarbon does not change the crystal structure of LiFePO4 and present as an amorphous phase.
XRD results show that the introduction of acticarbon does not change the crystal structure of LiFePO4.
Masquelier, Effect of structure on the Fe3+/Fe2+ redox couple in iron phosphates, J.
Online since: November 2010
Authors: Qiang Li, Wan Zhong Yin, Ying Qiang Ma
The mass contents of surface oxygen and relative density affected the surface electric properties, and therefore the isoelectric point of dolomite was higher in solution.Based on crystal chemistry formulas, the Mn+-O2- bond parameters were calculated.
The analysis between the crystal structures of magnesite and dolomite and surface electric properties.
Fig. 7 The XPS spectrogram of magnesite and dolomite The crystal structures of magnesite and dolomite are similar.
Based on crystal chemistry formulas, the Mn+-O2- bond parameters, such as the average bond length, electrostatic valence strength, coulomb force, electrovalent bond rate and polarity, bonding intensity and average bond valence of Mn+-O2- bond were calculated.
From Table 2 we can see that the main crystal structure differences between the two minerals were the ions and ionic bonding property of the Mg-O and Ca-O bond.
Online since: March 2008
Authors: Shao Yi Wu, Zhi Hong Zhang, Li Hua Wei, Yue Xia Hu
The calculated EPR parameters based on the above defect structures show reasonable agreement with the experimental data.
If charge compensation is far from the central Ni2+, the local structures of the impurity centers approximately conserve the original cubic (Oh) symmetry in pure crystals.
Thus, the local structure of the tetragonal centers can be described as the ligand displacement ∆Z.
Thus the defect structures of the Ni2+ centers may be described as the compressed octahedra due to the ligand displacements ∆Z, corresponding to the negative D values.
Weast: CRC Handbook of Chemistry and Physics (CRC Press, Boca Raton, 1989) p.
Online since: November 2020
Authors: Bogdan Ostafiychuk, Volodymyr Kotsyubynsky, Volodymyr Chelyadyn, Andrii Hrubiak, Volodymyr Moklyak, Maryna Mizilevska, Mariia Moklyak, Roman Lisovskyy, Yurii Yavorskyi
Synthesis, Structure, Optic and Photocatalytic Properties of Anatase/Brookite Nanocomposites Volodymyr Moklyak1,a, Volodymyr Chelyadyn2,b*, Andrii Hrubiak3,c, Bogdan Ostafiychuk4,d, Volodymyr Kotsyubynsky5,e, Maryna Mizilevska6,f, Mariya Moklyak7,g, Roman Lisovskyy8,h and Yurii Yavorskyi9,i 1,2,3,4,7Institute of Metal Physics, National Academy of Science, 36 Aсad.
Investigation of the phase composition and crystalline structure of the synthesized materials was performed by X-ray diffraction in radiation copper anode with a focus on Bragg-Brentano (Diffractometer mark DRON-3.0).
Yu, New understanding of the difference of photocatalytic activity among anatase, rutile and brookite TiO2 , Physical chemistry chemical physics. 16(38), (2014) 20382-20386
Zhong, Controllable synthesis of brookite/anatase/rutile TiO2 nanocomposites and single-crystalline rutile nanorods array, Journal of Materials Chemistry. 22(16), (2012) 7937-7944
, Crystalline composition analysis, reconstruction from isolated pure particles and photocatalytic activity test, Journal of Photochemistry and Photobiology A: Chemistry. 216(2-3), (2010) 179-182
Online since: January 2012
This scientific field investigates the relationship between the structure of materials at atomic or molecular scales and their macroscopic properties.
It incorporates elements of applied physics and chemistry.