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Investigation of Composition and Technological Parameters of Highly Porous Gypsum Products Obtaining
Online since: January 2020
Authors: Lilia V. Ilina, Lubov V. Zavadskaya, Anastasia I. Ilina
A highly porous structure of a gypsum product creation is possible due to the porisation of gypsum mass, using new types of complex gas-forming components.
At the same time, it is necessary to determine the technological conditions for the optimal formation of porous gypsum products structure and methods for increasing their strength.
Homogeneous structure is formed with a pore size of 0.5-1 mm, the total porosity of the gas gypsum reached 70% in the process of mass porisation.
Curves of the complex thermal analysis of gas gypsum with the fiberglass addition Thus, the introduction of fiberglass additives leads to the formation of a denser structure containing a smaller amount of the involved water.
Timashev, Physical Chemistry of Binding Materials, Moscow: Higher. wk (1989) 384.
At the same time, it is necessary to determine the technological conditions for the optimal formation of porous gypsum products structure and methods for increasing their strength.
Homogeneous structure is formed with a pore size of 0.5-1 mm, the total porosity of the gas gypsum reached 70% in the process of mass porisation.
Curves of the complex thermal analysis of gas gypsum with the fiberglass addition Thus, the introduction of fiberglass additives leads to the formation of a denser structure containing a smaller amount of the involved water.
Timashev, Physical Chemistry of Binding Materials, Moscow: Higher. wk (1989) 384.
Online since: May 2020
Authors: A.A. Okhlopkova, A.P. Vasilev, T.S. Struchkova
Ammosov North-Eastern Federal University", Institute of Natural Sciences, Chemistry Department, 58 Belinsky str., Republic of Sakha (Yakutia), Russia, 677027
2Institute of Oil and Gas Problems Siberian Branch, Russian Academy of Sciences, Yakutsk 677000, Russia
agtvap@mail.ru
Keywords: polytetrafluoroethylene, carbon fiber, vermiculite, UPTFE, wear, coefficient of friction.
This work is devoted to studying the impact of carbon fibers with vermiculite and ultrafine polytetrafluoroethylene on the structure and properties of polytetrafluoroethylene.
To achieving a strong adhesive between carbon fibers and PTFE, various methods of fiber modification are used, which are based on the structure change of their surface [10-12].
After friction test of the PCM secondary structures are visible on the worn surface at high magnification on image the SEM (Fig. 3).
Bashlakova, Investigation of the Influence of Complex Fillers on the Properties and Structure of Polytetrafluoroethylene, Journal of Friction and Wear. 39 (2018) 427–432.
This work is devoted to studying the impact of carbon fibers with vermiculite and ultrafine polytetrafluoroethylene on the structure and properties of polytetrafluoroethylene.
To achieving a strong adhesive between carbon fibers and PTFE, various methods of fiber modification are used, which are based on the structure change of their surface [10-12].
After friction test of the PCM secondary structures are visible on the worn surface at high magnification on image the SEM (Fig. 3).
Bashlakova, Investigation of the Influence of Complex Fillers on the Properties and Structure of Polytetrafluoroethylene, Journal of Friction and Wear. 39 (2018) 427–432.
Online since: June 2025
Authors: Ivan Vladimirovich Barinov, Igor Andreevich Pastukhov, Edmond Karenovich Poghosyan, Igor Olegovich Stasyuk, Valeriy Vasilyevich Savin, Ludmila Alekseevna Savina, Vitaliy Georgievich Salamatov
The crystal structure of the phase can be described as a layered structure with an alternating sequence of stacking of an Nd-rich layer and a layer consisting only of Fe atoms.
Extensive studies of the changes in structure and phase state of the materials of the experimental samples obtained by micromagnetic surfacing were compared with the original structure and phase states of the MQ-GAP used.
Kostenko, Crystal chemistry of intermediate phases and amorphous alloys based on transition metals, Monograph, Zaporozhye National University, 2005. pp. 346 [18] V.V.
Chaika, Crystal chemistry of anisotropy magnetic properties gas atomization powders of an alloy of the Fe-Nd-B system, IOP Conf.
Advances in Chemistry (RAS). 72-9 (2003) 853-862 [29] Ya.
Extensive studies of the changes in structure and phase state of the materials of the experimental samples obtained by micromagnetic surfacing were compared with the original structure and phase states of the MQ-GAP used.
Kostenko, Crystal chemistry of intermediate phases and amorphous alloys based on transition metals, Monograph, Zaporozhye National University, 2005. pp. 346 [18] V.V.
Chaika, Crystal chemistry of anisotropy magnetic properties gas atomization powders of an alloy of the Fe-Nd-B system, IOP Conf.
Advances in Chemistry (RAS). 72-9 (2003) 853-862 [29] Ya.
Online since: June 2021
Authors: Jian Ying Yu, Xiao Bin Han, San Peng Mao, Jiang Ting Li, Gui Tao Zheng
Chemical structure.
FTIR spectrometer (Nexus, Thermo Nicolet Corporation, America) was used to characterize the chemical structure of MB.
The IC=O and IS=O changed the most after immersing in alkaline solution, which was attributed to that the reaction between alkaline media and bitumen caused greatly damage to the structure of bitumen.
Modern Building Materials, Structures and Techniques, 2017, 172:1297-1304
Materials Chemistry and Physics, 2011, 129(3): 769-776
FTIR spectrometer (Nexus, Thermo Nicolet Corporation, America) was used to characterize the chemical structure of MB.
The IC=O and IS=O changed the most after immersing in alkaline solution, which was attributed to that the reaction between alkaline media and bitumen caused greatly damage to the structure of bitumen.
Modern Building Materials, Structures and Techniques, 2017, 172:1297-1304
Materials Chemistry and Physics, 2011, 129(3): 769-776
Online since: July 2013
Authors: Bhawna Sarwan
The structure of the dye is shown in Fig. 1.
Fig. 1: The chemical structure of Methylene green (MG).
Structure of the all prepared samples was resolved by selected electron diffraction patterns (SAED).
Maiwal, Head, department of Chemistry, Madhav Science College, Ujjain, India.
Wang, Study of the electronic structure and photocatalytic activity of the BiOCl photocatalyst, Appl.
Fig. 1: The chemical structure of Methylene green (MG).
Structure of the all prepared samples was resolved by selected electron diffraction patterns (SAED).
Maiwal, Head, department of Chemistry, Madhav Science College, Ujjain, India.
Wang, Study of the electronic structure and photocatalytic activity of the BiOCl photocatalyst, Appl.
Online since: July 2020
Authors: Muayad A. Shihab, Shaho A. Mohamedali, Mazin N. Alsalmaney, Amer Talal Nawaf
The morphology of the CNTs (see Fig. 1 c and d) became rougher after been activated with KOH which severely damaged the structure of the CNTs.
The high activation efficiency of CNTs could be attributed to the introducing of the porosity to the CNTs structure by activating with KOH.
NaOH activation is reported developing presence of microporous structure of CNTs of hundreds of nanometers [23].
Luo, "Porous glass beads as a new adsorbent to remove sulfur-containing compounds," Green Chemistry, 10.1039/C2GC16559G vol. 14, no. 4, pp. 1009-1015, 2012
Shi, "Adsorption of Thiophene on Pt/Ag-Supported Activated Carbons Prepared by Ultrasonic-Assisted Impregnation," Industrial & Engineering Chemistry Research, vol. 50, no. 15, pp. 9363-9367, 2011/08/03 2011
The high activation efficiency of CNTs could be attributed to the introducing of the porosity to the CNTs structure by activating with KOH.
NaOH activation is reported developing presence of microporous structure of CNTs of hundreds of nanometers [23].
Luo, "Porous glass beads as a new adsorbent to remove sulfur-containing compounds," Green Chemistry, 10.1039/C2GC16559G vol. 14, no. 4, pp. 1009-1015, 2012
Shi, "Adsorption of Thiophene on Pt/Ag-Supported Activated Carbons Prepared by Ultrasonic-Assisted Impregnation," Industrial & Engineering Chemistry Research, vol. 50, no. 15, pp. 9363-9367, 2011/08/03 2011
Online since: February 2014
Authors: Ali Marashdeh
The calculations consider H on the octahedral sites of the metal lattice, i.e., cubes structures Pd4H4-x (x=0–4).
For each structure, the cell volume, the total energy, the bulk modulus and the derivative of the bulk modulus have been calculated.
The equilibrium lattice volume and the bulk modulus for each structure were determined.
ZPE was calculated and included for each structure to study its influence on the computed properties.
The sublattice consisting of the octahedral sites also forms a FCC structure with its sites occupied by H and/or vacancies.
For each structure, the cell volume, the total energy, the bulk modulus and the derivative of the bulk modulus have been calculated.
The equilibrium lattice volume and the bulk modulus for each structure were determined.
ZPE was calculated and included for each structure to study its influence on the computed properties.
The sublattice consisting of the octahedral sites also forms a FCC structure with its sites occupied by H and/or vacancies.
Online since: August 2014
Authors: Xie Bin Zhu, Jing Chen, Zhong Jia Huang
The obtained powder was loose, well-doped tetragonal structure particle with the size of about 15 ~ 30 nm but its poor dispersion under the given reaction conditions.
It caused the crystallinity of crystal decreased and lattice structure incomplete.
J Physics Chemistry of Solids, 2003, 64(7): 1105-1112
Effects of Sb content on the structure and electric property of ATO nanoparticles [J] Journal of functional materials, 2011, 42(11):1993-1996
Nano structure ATO and composite prepared and its electrochemical properties [D].
It caused the crystallinity of crystal decreased and lattice structure incomplete.
J Physics Chemistry of Solids, 2003, 64(7): 1105-1112
Effects of Sb content on the structure and electric property of ATO nanoparticles [J] Journal of functional materials, 2011, 42(11):1993-1996
Nano structure ATO and composite prepared and its electrochemical properties [D].
Online since: May 2014
Authors: Yuan Tong Gu, D.P. Thambiratnam, M.I. Thiyahuddin
Portable water-filled road barriers (PWFB) are roadside structures placed on temporary construction zones to separate work site from traffic.
The structure of PWFB consists of two main parts defined as the main body and the joint mechanism.
The weakest sections in most structures are often the joints.
Joints represent a discontinuity in the road safety structure.
In general, a PWFB consists of a hollow rectangular polymeric structure that can be filled with water.
The structure of PWFB consists of two main parts defined as the main body and the joint mechanism.
The weakest sections in most structures are often the joints.
Joints represent a discontinuity in the road safety structure.
In general, a PWFB consists of a hollow rectangular polymeric structure that can be filled with water.
Online since: March 2023
Authors: Peter Horňak, Marek Vojtko, Vasily Efremenko, Bohdan Efremenko, Vadym Zurnadzhy, Yuliia Chabak, Angeliki Lekatou
This structure was composed of fine columnar dendrites.
As-cast Co-28Cr-6Mo features a dendrite structure/liquation with typical coarse grains [4].
X-ray diffraction revealed a mixed α(FCC)+ε(HCP) structure with α-phase prevailing.
Etching revealed the dendritic structure of the alloy against the background of the grain pattern.
Sukhova, The effect of carbon content and cooling rate on the structure of boron-rich fe-B-C alloys, Physics and Chemistry of Solid State, 21 (2) (2020) 355-360.
As-cast Co-28Cr-6Mo features a dendrite structure/liquation with typical coarse grains [4].
X-ray diffraction revealed a mixed α(FCC)+ε(HCP) structure with α-phase prevailing.
Etching revealed the dendritic structure of the alloy against the background of the grain pattern.
Sukhova, The effect of carbon content and cooling rate on the structure of boron-rich fe-B-C alloys, Physics and Chemistry of Solid State, 21 (2) (2020) 355-360.