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Online since: December 2011
Authors: Shu Hua Qi, Li Na Ma, Bo Cheng
Conductive and Mechanical Properties of Graphite Nanoplatelets/ PVC Nanocomposites Prepared by Melt Blending Cheng Bo1, a, Qi Shu Hua1, b and Ma Li Na1, c 1Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi’an 710072, P.R.
The structure of Nano-Gs was characterized by FTIR and SEM, the conductive and mechanical properties of the Nano-Gs/ PVC nanocomposites were also studied.
When used as the conductive filler, the nano-sheet structure is conducive to the formation of conductive pathways in the polymer, which reduces conductive percolation threshold greatly [7].
From Fig. 1a, Fig. 1b it can be observed that expanded graphite is loose and worm shaped, and its structure is basically parallel boards, which collapse and deform desultorily, resulting in many pores of different sizes.
From Fig. 4 it can be seen that Nano-Gs are dispersed in the PVC resin randomly, and retain the original structure substantially.
Online since: September 2017
Authors: Yulia Efimova, V.L. Steblyanko, Anton P. Ponomarev
The paper presents the results of the structure and composition studies of zinc plasma-electrolytic coatings on a strip for armoring cables of group A (GOST 3559-75).
Analysis of samples by differential scanning calorimetry (DSC-analysis) is performed with simultaneous thermal analyzer NETZSCH STA 449 F3 Jupiter in the Laboratory of physico-chemical testing of packaging materials of the Department of Chemistry of Nosov Magnitogorsk State Technical University.
The authors note that the coatings are characterized by increased roughness and homogeneous structure with uniformly distributed spherical grains.
This result testifies that it has been formed a dense coating with stable bond of elements in its structure.
Ponomarev, Improvement of zinc coating service properties on the basis of formation its structure features in plasma-electrolytic surface treatment, Vestnik Magnitogorskogo gosudarstvennogo tekhnicheskogo universiteta im.
Online since: December 2012
Authors: Larry D. Hefti
A variation of the process combines SPF with diffusion bonding (SPF/DB) of two or more pieces of titanium together to produce integrally stiffened structure containing very few fasteners.
The chemistry of the alloy was kept within the limits of the AMS4911 specification in order to keep the designation familiar to engineers and manufacturing.
Sheet Metal Heat Shields for Twin Aisle Aircraft [4, 7] The aft fairing heat shields, which protect the structure above the engine from high temperature exhaust gases, have typically been fabricated from titanium castings.
This geometry is used to provide more thermal protection for the structure above the engines but no longer allows a simple bent piece of sheet metal to act as the part.
Assemblies of sheet metals details are used to produce this structure.
Online since: January 2015
Authors: Yuri Barabanshchikov, Anna Arkharova, Maksimilian Ternovskii
Figure 4 shows the shrinkage during the drying of the same structures, obtained by subtraction of autogenic shrinkage from the overall air shrinkage.
The curve for structure with two additives 1 % FK48+6 % RCL is located above the curve for structure with only one shrink-resistant 6 % RCL additive.
Conference on Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures, 2, pp. 855-862
A review of synergistic and antagonistic effects between oilwell cement additives (2013) Proceedings - SPE International Symposium on Oilfield Chemistry 2, pp. 690 - 702 [19] José Oliveira, M., Ribeiro, A.B., Branco, F.G.
Poristyye reaktsionnyye poroshkovyye betony [The porous reactive powder concrete] (2014) Construction of Unique Buildings and Structures, 8 (23), pp. 128-135.
Online since: February 2020
Authors: Antonio Hortencio Munhoz Júnior, Raphael Cons Andrades, Roberto Freitas Neves, Francisco Rolando Valenzuela Díaz
The structure of zeolites consists of tetrahedra of TO4 (T = Al or Si) with oxygen atoms joining the vertices.
It is also evident that the kaolinite particles are stacked, forming a structure called booklet, which is typical of kaolin.
The peaks belonging only to the structure of zeolite A are labelled with ZA, while the peaks that belong only to the structure of hydroxysodalite are labelled with S.
Characteristic peaks belonging to both structures are labelled with ZA/S.
Zeolite molecular sieves : structure, chemistry, and use.
Online since: July 2013
Authors: Zhi Yue Zhao, Huan Yun Wang, Chun Hui Pan, Cui Fang Dong
The super structure refers to the model that cover all the possible network structures of water-using system.
The simplified model of the super structure of water-using unit as shown in Fig. 3.
For the water-using system with multiple impurities, because of the mathematical model is nonlinear mathematical programming model, advantage and disadvantage of the super structure, the structure of constraint function, and selection of the initial values all directly affect the solution.
The structure of the water-using network is shown in Fig. 4.
A new structure and design methodology for water networks.
Online since: May 2020
Authors: Shu Ling Zhang, Wei Ye Chen, M.K. Qiu, W.L. Liu, Yong Chuan Yu
Therefore, Ti-based alloys have been more and more widely used in aviation, aerospace, chemistry, shipbuilding and other industrial sectors [11].
The as-cast alloys generally had typical structures such as lamellar structure and equiaxed structure.
It is found from Fig. 7(b) and (c) that theα' phase is widely distributed on the β matrix, and exhibits a needle-like structure and a partially mixed structure which are arranged in parallel.
Compared with the thin ribbon structure obtained at 2000 rad/min, α' phase is significantly increased with α′′ phase.
The α' phase is a hexagonal structure, and the α" is a rhombic martensite.
Online since: March 2019
Authors: Esther Titilayo Akinlabi, Oluseyi Philip Oladijo, Akinsanya Baruwa, Jeff Chinn, Stephen Akinwale Akinlabi
The aim of this research is to investigate three different silanes newly formulated and to ascertain the capacity and integrity of their structures.
This adsorption is an indication that the structures of the silane film or coating are intact and exert a protective layer on the AISI 304 substrate.
EIS was used to determine the best among the three silanes as the FTIR and XRD investigation did not reflect any disparity in the chemical components and structure.
The XRD and FTIR results show that all the hydrophobic silane films are chemically stable in elementary composition and structure.
Coatings Technol., 321 (2017) 36–44 [24] Pedersen H and Elliott S D, Studying chemical vapor deposition processes with theoretical chemistry Theor.
Online since: February 2022
Authors: Fan Zhu, Lei Zhang, Yu Feng Wang, Zi Min Fan
Wang, Recent Advances in the Rational Design of Thermal Conductive Polymer Composites, Industrial & Engineering Chemistry Research. 60 (2021) 1137-1154. ] and thermoelastic coefficient theory [[] N.X.
The thermal conductivity in the direction parallel to the magnetic field is significantly higher than that in other places. 2.3.4 Construction of 3D skeleton structure The efficiency of heat transfer can be greatly improved by constructing ordered 3D skeleton structure.
The main methods of constructing 3D structure are self-assembly method, template method and freeze drying method, etc.
The thermal conductivity filler is pre-constructed into 3D network skeleton structure, and then filled into the polymer matrix to prepare the composite material with complete thermal conductivity network structure
The ordered three-dimensional network structure is beneficial to the improvement of thermal conductivity of composites.
Online since: May 2013
Authors: Pavla Rovnaníková, Ámos Dufka, Rostislav Drochytka
Subsequently, the shape and structure of the facade was augmented by means of lime plaster with a pozzolana additive.
The coat was therefore only applied to the base, which was markedly inconsistent in terms of its structure.
Fig. 3 Detailed view of an area where the base structure consisting of ochre stucco shows through.
Fig. 4 View of an area where the structure of the base layer affects the colour tinge of the top coat.
The structure of the samples was evaluated visually; a detailed analysis was then performed using a magnifier.