scholarly journals The study of the charge relaxation kinetics in polyethylene with nanofillers

2021 ◽  
Vol 2103 (1) ◽  
pp. 012104
Author(s):  
A A Pavlov ◽  
A M Kamalov ◽  
M E Borisova ◽  
G V Greshnyakov ◽  
G V Vaganov
Keyword(s):  
Composite Materials ◽  
Modern Theory ◽  
Mass Percentage ◽  
Relaxation Kinetics ◽  
Intrinsic Conductivity ◽  
Charge Relaxation

Abstract The work focuses on the study of the charge relaxation kinetics in composite materials based on polyethylene. Time dependences of the electretic potential differences for samples with different mass values of the filler, as well as dependences of conductivity from the mass percentage of the filler, were achieved. The conductivity curves were analyzed according to the modern theory of intrinsic conductivity.

Preparation of Tourmaline and Carbon Nanotubes Based Composite Materials and its Heat Emission Performance

2012 ◽  
Vol 427 ◽  
pp. 110-114
Author(s):  
Gang Xue ◽  
Ran Yu ◽  
Sai Fei Wang ◽  
Chao Yue Zhao
Keyword(s):  
Carbon Nanotubes ◽  
Composite Materials ◽  
Transition Metal Oxides ◽  
Far Infrared ◽  
Infrared Emission ◽  
Heat Emission ◽  
Mass Percentage ◽  
Natural Mineral ◽  
Emission Performance ◽  
Thermal Coating

The tourmaline-based composite materials as an effective thermal coating of heat exchanger unit were prepared from natural mineral tourmaline, transition metal oxides and carbon nanotubes. The far infrared emission properties and heat emission performance were studied. The results indicated that thermal performance of materials can be adjusted with the chemical composition of materials, and when the mass percentage of carbon nanotubes is 10%, the fractional of 26.77% of energy saving efficiency can be achieved.

Features of Thermally Stimulated Charge Storage and Relaxation in Heterogeneous Systems of Dispersed Mica

2008 ◽  
Vol 3 (4) ◽  
pp. 33-39
Author(s):  
Vladislav S. Borisov ◽  
Vyacheslav D. Marchuk ◽  
Yana V. Ezhova ◽  
Sergey S. Baryshnikov ◽  
Alexey I. Mandanov ◽  
...  
Keyword(s):  
Composite Materials ◽  
Water Content ◽  
Heterogeneous Systems ◽  
Adsorbed Water ◽  
Charge Storage ◽  
Dimensional System ◽  
Charge Relaxation ◽  
Relaxation Parameters ◽  
Electret State ◽  
Low Dimensional

Thermally stimulated spectra of hydrated dispersed mica in the range of temperatures (20–140)оС are analyzed to study the electret properties of the system subject to water content. It was found that electret and relaxation parameters of the samples depend on the amount of adsorbed water. Peculiarities of the electret state of mica particles low-dimensional system and the influence of adsorbed water on charge relaxation in the system have been established. Obtained results can be applied for developing new composite materials that contain dispersed mica as a filling compound.

Comparative Microstructures of Ion Milled and Electrochemically Thinned Composite Materials

1974 ◽  
Vol 32 ◽  
pp. 546-547
Author(s):  
R.R. Russell
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Composite Materials ◽  
Great Difficulty ◽  
Ion Milling ◽  
Transmission Electron ◽  
Ion Damage ◽  
Intermetallic Composite

Transmission electron microscopy of metallic/intermetallic composite materials is most challenging since the microscopist typically has great difficulty preparing specimens with uniform electron thin areas in adjacent phases. The application of ion milling for thinning foils from such materials has been quite effective. Although composite specimens prepared by ion milling have yielded much microstructural information, this technique has some inherent drawbacks such as the possible generation of ion damage near sample surfaces.

Transmission electron microscopy of composite materials

1988 ◽  
Vol 46 ◽  
pp. 1012-1015
Author(s):  
K.P.D. Lagerlof
Keyword(s):  
Composite Materials ◽  
Physical Properties ◽  
Structural Defects ◽  
Structural Composites ◽  
Multiphase Materials ◽  
Structural Reinforcement ◽  
Transmission Electron ◽  
Reinforced Fiber ◽  
Particulate Reinforced Composites ◽  
Definition Of

Although most materials contain more than one phase, and thus are multiphase materials, the definition of composite materials is commonly used to describe those materials containing more than one phase deliberately added to obtain certain desired physical properties. Composite materials are often classified according to their application, i.e. structural composites and electronic composites, but may also be classified according to the type of compounds making up the composite, i.e. metal/ceramic, ceramic/ceramie and metal/semiconductor composites. For structural composites it is also common to refer to the type of structural reinforcement; whisker-reinforced, fiber-reinforced, or particulate reinforced composites [1-4].For all types of composite materials, it is of fundamental importance to understand the relationship between the microstructure and the observed physical properties, and it is therefore vital to properly characterize the microstructure. The interfaces separating the different phases comprising the composite are of particular interest to understand. In structural composites the interface is often the weakest part, where fracture will nucleate, and in electronic composites structural defects at or near the interface will affect the critical electronic properties.

“Triple Helix” in Russia’s Innovation System

2007 ◽  
pp. 123-135 ◽  
Author(s):  
I. Dezhina ◽  
V. Kiseleva
Keyword(s):  
Triple Helix ◽  
Government Regulation ◽  
Innovation System ◽  
Innovation Systems ◽  
Modern Theory

The article analyzes modern theory that explains the specificity of relationships among government, science and business in innovation systems - the "triple helix" concept. Factors that determine the appearance of new theory are systematized. The peculiarities of formation of "triple helix" in Russia are described, including the development of science, business and the system of government regulation in innovation sphere. The conclusion is made that currently in Russia only double linkages are formed.

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