Three-dimensional rice husk-originated mesoporous silicon and its electrical properties

Integration of two dimensional (2D) materials with three dimensional (3D) semiconductors reveals intriguing optical and electrical properties that surpass those of the original materials. Here we report the high performance...

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Rice husk bio-filler reinforced polymer blends of recycled HDPE/PET: Three-dimensional stability under water immersion and mechanical performance

Polymer Composites ◽

10.1002/pc.24260 ◽

2016 ◽

Vol 39 (8) ◽

pp. 2695-2704 ◽

Cited By ~ 8

Author(s):

Ruey Shan Chen ◽

Sahrim Ahmad ◽

Sinyee Gan

Keyword(s):

Polymer Blends ◽

Rice Husk ◽

Dimensional Stability ◽

Mechanical Performance ◽

Water Immersion ◽

Three Dimensional ◽

Reinforced Polymer ◽

Recycled Hdpe

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Three-Dimensional Potential and Electric Field Distributions in HV Cable Insulation Containing Multiple Cavities

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.845.372 ◽

2013 ◽

Vol 845 ◽

pp. 372-377 ◽

Cited By ~ 6

Author(s):

Nabipour Afrouzi Hadi ◽

Zulkurnain Abdul-Malek ◽

Saeed Vahabi Mashak ◽

A.R. Naderipour

Keyword(s):

Electrical Properties ◽

Electric Field ◽

High Voltage ◽

Three Dimensional ◽

The Finite Element Method ◽

Low Dielectric ◽

Underground Cable ◽

Insulation Failure ◽

Field Distributions ◽

Hv Cable

Cross-linked polyethylene is widely used as electrical insulation because of its excellent electrical properties such as low dielectric constant, low dielectric loss and also due to its excellent chemical resistance and mechanical flexibility. Nevertheless, the most important reason for failure of high voltage equipment is due to its insulation failure. The electrical properties of an insulator are affected by the presence of cavities within the insulating material, in particular with regard to the electric field and potential distributions. In this paper, the electric field and potential distributions in high voltage cables containing single and multiple cavities are studied. Three different insulating media, namely PE, XLPE, and PVC was modeled. COMSOL software which utilises the finite element method (FEM) was used to carry out the simulation. An 11kV underground cable was modeled in 3D for better observation and analyses of the generated voltage and field distributions. The results show that the electric field is affected by the presence of cavities in the insulation. Furthermore, the field strength and uniformity are also affected by whether cavities are radially or axially aligned, as well as the type of the insulating solid. The effect of insulator type due the presence of cavities was seen most prevalent in PVC followed by PE and then XLPE.

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Electromagnetic images of the Trans-Hudson orogen: the North American Central Plains anomaly revealed

Canadian Journal of Earth Sciences ◽

10.1139/e05-018 ◽

2005 ◽

Vol 42 (4) ◽

pp. 457-478 ◽

Cited By ~ 47

Author(s):

Alan G Jones ◽

Juanjo Ledo ◽

Ian J Ferguson

Keyword(s):

Electrical Properties ◽

North American ◽

Upper Mantle ◽

Lithospheric Mantle ◽

Three Dimensional ◽

Conductivity Anomaly ◽

Central Plains ◽

Slave Craton ◽

The North ◽

Kimberlite Field

Magnetotelluric studies of the Trans-Hudson orogen over the last two decades, prompted by the discovery of a significant conductivity anomaly beneath the North American Central Plains (NACP), from over 300 sites yield an extensive database for interrogation and enable three-dimensional information to be obtained about the geometry of the orogen from southern North Dakota to northern Saskatchewan. The NACP anomaly is remarkable in its continuity along strike, testimony to along-strike similarity of orogenic processes. Where bedrock is exposed, the anomaly can be associated with sulphides that were metamorphosed during subduction and compression and penetratively emplaced deep within the crust of the internides of the orogen to the boundary of the Hearne margin. A new result from this compilation is the discovery of an anomaly within the upper mantle beginning at depths of ~80100 km. This lithospheric mantle conductor has electrical properties similar to those for the central Slave craton mantle conductor, which lies directly beneath the major diamond-producing Lac de Gras kimberlite field. While the Saskatchewan mantle conductor does not directly underlie the Fort à la Corne kimberlite, which is associated with the Sask craton, the spatial correspondence is close.

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Rapid manufacturing of copper-graphene composites using a novel rapid tooling technique

Rapid Prototyping Journal ◽

10.1108/rpj-10-2019-0258 ◽

2020 ◽

Vol 26 (4) ◽

pp. 765-776 ◽

Cited By ~ 3

Author(s):

Gurminder Singh ◽

Pulak Mohan Pandey

Keyword(s):

Electrical Conductivity ◽

Electrical Properties ◽

Wear Rate ◽

Coefficient Of Friction ◽

Rate Coefficient ◽

Three Dimensional ◽

Rapid Tooling ◽

Content Type ◽

Three Dimensional Printing ◽

Dimensional Printing

Purpose The purpose of this study is to study the mechanical, tribological and electrical properties of the copper-graphene (Cu-Gn) composites fabricated by a novel rapid tooling technique consist of three-dimensional printing and ultrasonic-assisted pressureless sintering (UAPS). Design/methodology/approach Four different Cu-Gn compositions with 0.25, 0.5, 1 and 1.5 per cent of graphene were fabricated using an amalgamation of three-dimensional printing and UAPS. The polymer 3d printed parts were used to prepare mould cavity and later the UAPS process was used to sinter Cu-Gn powder to acquire free-form shape. The density, hardness, wear rate, coefficient of friction and electrical conductivity were evaluated for the different compositions of graphene and compared with the pure copper. Besides, the comparison was performed with the conventional method. Findings Cu-Gn composites revealed excellent wear properties due to higher hardness, and the lubrication provided by the graphene. The electrical conductivity of the fabricated Cu-Gn composites started increasing initially but decreased afterwards with increasing the content of graphene. The UAPS fabricated composites outperformed the conventional method manufactured samples with better properties such as density, hardness, wear rate, coefficient of friction and electrical conductivity due to homogeneous mixing of metal particles and graphene. Originality/value The fabrication of Cu-Gn composite freeform shapes was found to be difficult using conventional methods. The novel technique using a combination of polymer three-dimensional printing and UAPS as rapid tooling was introduced for the fabrication of freeform shapes of Cu-Gn composites and mechanical, tribological and electrical properties were studied. The method can be used to fabricate optimized complex Cu-Gn structures with improved wear and electrical applications.

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Three Dimensional Structure-Electrical Properties of Oriented PPV and PANI Films

2003 International Electronic Packaging Technical Conference and Exhibition, Volume 2 ◽

10.1115/ipack2003-35009 ◽

2003 ◽

Author(s):

Runqing Ou ◽

Robert J. Samuels ◽

Rosario A. Gerhardt

Keyword(s):

Electrical Properties ◽

Three Dimensional ◽

The Other ◽

Planar Structure ◽

Dimensional Structure ◽

Phenylene Vinylene ◽

Random Orientation ◽

Waveguide Coupler ◽

Impedance Measurements ◽

Oriented Films

In this paper the influence of anisotropic molecular structure on the three dimensional electrical properties of both poly(phenylene vinylene), (PPV), and polyaniline, (PANI) oriented films is investigated. The anisotropic structure of the stretched PPV and PANI EB films were examined using a modified waveguide coupler while three dimensional impedance spectroscopy measurements were made using specially designed test fixtures that allowed the in-plane as well as the through-plane impedance to be measured. The unstretched PANI EB film has a random orientation and one-way stretching leads to a uniaxial structure. The unstretched PPV film, on the other hand, was found to have a highly planar structure and oneway stretching converts the planar structure to a uniaxial structure. Impedance measurements were made on PANI after it was doped with HCl while PPV films were measured in the undoped state. For HCl-doped PANI films, the conductivity along the stretch direction was found to increase with orientation. For undoped PPV films, the conductivity through the film thickness direction decreased with increasing orientation. For both polymers, the in-plane conductivity was significantly greater than the through-plane conductivity.

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Comparison Between Isotropic and Anisotropic Electrical Properties of a DTI-Based Cardiac Model

ASME 2008 Summer Bioengineering Conference, Parts A and B ◽

10.1115/sbc2008-193049 ◽

2008 ◽

Author(s):

Ana Maria Saaibi ◽

Isaac Chang ◽

Min-Sig Hwang ◽

Malisa Sarntinoranont

Keyword(s):

Electrical Properties ◽

Ventricular Fibrillation ◽

Cardiac Function ◽

Cardiac Arrhythmias ◽

Three Dimensional ◽

Delicate Balance ◽

Cardiac Model ◽

Myocardial Fibers ◽

Fiber Organization ◽

Cardiac Fibers

Cardiac function is influenced by the three-dimensional organization of the myocardial fibers. Cardiac fibers are arranged in a circumferential, longitudinal, and a sheet-like fashion, forming counter-wound helices from the base to the apex of the heart. This fiber organization is responsible for the delicate balance between mechanical and electrical functioning of the heart. When electrical disruption of this coordinated function occurs, this is associated with cardiac arrhythmias which may lead to more serious conditions like ventricular fibrillation.

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