scholarly journals Nonlinear Electrical Conduction in Polymer Composites for Field Grading in High-Voltage Applications: A Review

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1370
Author(s):  
Alejandro Can-Ortiz ◽  
Lionel Laudebat ◽  
Zarel Valdez-Nava ◽  
Sombel Diaham
Keyword(s):  
Electric Field ◽  
Polymer Composites ◽  
High Voltage ◽  
Electrical Conduction ◽  
High Performance ◽  
Polymeric Materials ◽  
Comprehensive Review ◽  
Electrical Systems ◽  
Recent Developments ◽  
High Voltage Engineering

Applications of polymeric materials in electrical engineering increasingly require improvements in operating voltages, performance, reliability, and size reduction. However, the resulting increase on the electric field in electrical systems can prevent achieving these goals. Polymer composites, functionalized with conductive or semiconductive particles, can allow us to reduce the electric field, thus grading the field within the system. In this paper, a comprehensive review of field-grading materials, their properties, and recent developments and applications is provided to realize high-performance high-voltage engineering applications.

Molecular materials for micro-electronics

2000 ◽  
Vol 78 (3) ◽  
pp. 231-241 ◽  
Author(s):  
M D'Iorio
Keyword(s):  
High Performance ◽  
Organic Materials ◽  
Coming Of Age ◽  
Polymeric Materials ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Plastic Electronics ◽  
Organic Light ◽  
Recent Developments

Molecular organic materials have had an illustrious past but the ability to deposit these as homogeneous thin films has rejuvenated the field and led to organic light-emitting diodes (OLEDs) and the development of an increasing number of high-performance polymers for nonlinear and electronic applications. Whereas the use of organic materials in micro-electronics was restricted to photoresists for patterning purposes, polymeric materials are coming of age as metallic interconnects, flexible substrates, insulators, and semiconductors in all-plastic electronics. The focus of this topical review will be on organic light-emitting devices with a discussion of the most recent developments in electronic devices.PACS Nos.: 85.60Jb, 78.60Fi, 78.55Kz, 78.66Qn, 73.61Ph, 72.80Le

Are Compact AMS Facilities a Competitive Alternative to Larger Tandem Accelerators?

Radiocarbon ◽  
2010 ◽  
Vol 52 (2) ◽  
pp. 319-330 ◽  
Author(s):  
M Suter ◽  
A M Müller ◽  
V Alfimov ◽  
M Christl ◽  
T Schulze-König ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
The Netherlands ◽  
High Voltage ◽  
Accelerator Mass Spectrometry ◽  
Biomedical Applications ◽  
Detection System ◽  
Ion Optics ◽  
Recent Developments ◽  
High Voltage Engineering

In the last decade, small and compact accelerator mass spectrometry (AMS) systems became available operating at terminal voltages of 1 MV and below. This new category of instruments has become competitive for radiocarbon detection to larger tandem accelerators and many of these instruments are successfully used for 14C dating or biomedical applications. The AMS group at ETH Zurich has demonstrated that small instruments can be built, which allow measurements also of other radionuclides such as 10Be, 26Al, 129I, and the actinides. 41Ca measurements can be performed with sufficient sensitivity for biomedical applications. A summary of recent developments made at the 500kV Pelletron in Zurich is given and its performance is compared with that of a commercial compact instrument from the company High Voltage Engineering Europe (HVEE) in Amersfoort, the Netherlands, operating at 1MV at CNA in Seville, Spain, as well as with that of larger AMS facilities. It turns out that the ion optics, stripper design, and the detection system are critical for the performance.

scholarly journals Changes in Physicochemical and Bioactive Profile of Garlic Pulp by High Voltage Electric Field

2020 ◽  
Vol 8 (1) ◽  
pp. 131-143
Author(s):  
P Poojitha ◽  
K.A. Athmaselvi
Keyword(s):  
Electric Field ◽  
High Voltage ◽  
Pyruvic Acid ◽  
High Performance ◽  
Ohmic Heating ◽  
Storage Period ◽  
Conventional Heating ◽  
Voltage Gradient ◽  
Growth Study

Ohmic heating is an unconventional rapid sterilizing technique for complex food fluids. In this study, garlic pulp was ohmic heated at 13.33, 20 and 26.66 V/cm and also in conventional means. The effect of high voltage electric field-induced ohmic heating for increasing the shelf-life and maintaining the quality of garlic pulp was investigated. The physicochemical properties like pH and colour were determined and microbial growth study was carried out for both the ohmic heated and conventionally heated garlic pulp throughout the storage period. During storage, the physiochemical changes were at a rapid rate in conventionally heated garlic pulp when compared with the ohmic heated pulp. Garlic pulp ohmic heated at high voltage gradient (26.66 V/cm) could extend the storage period upto 60 days without adding preservatives. Bioactive compounds were analysed using high performance liquid chromatography and found to have 8.83 µg/mL, 30.28 µg/mL, 9.04 µg/mL of alliin, pyruvic acid and diallyl disulphide content, respectively in garlic pulp ohmic heated at high voltage gradient. Whereas, in conventional heating, alliin, pyruvic acid and diallyl disulphide are found to be 4.71 µg/mL, 22.97 µg/mL, 4.64 µg/mL, respectively

scholarly journals Fruit waste valorization for biodegradable biocomposite applications: A review

BioResources ◽  
2019 ◽  
Vol 14 (4) ◽  
pp. 10047-10092 ◽  
Author(s):  
Alison C. Gowman ◽  
Maisyn C. Picard ◽  
Loong-Tak Lim ◽  
Manjusri Misra ◽  
Amar K. Mohanty
Keyword(s):  
Food Waste ◽  
Polymeric Materials ◽  
Waste Valorization ◽  
Comprehensive Review ◽  
Industrial Processing ◽  
Fruit Waste ◽  
Fruit Processing ◽  
Recent Developments ◽  
Fruit Wastes ◽  
By Products

Currently, food waste is a major concern for companies, governments, and consumers. One of the largest sources of food waste occurs during industrial processing, where substantial by-products are generated. Fruit processing creates a lot of these by-products, from undesirable or “ugly fruit,” to the skins, seeds, and fleshy parts of the fruits. These by-products compose up to 30% of the initial mass of fruit processed. Millions of tons of fruit wastes are generated globally from spoilage and industrial by-products, so it is essential to find alternative uses for fruit wastes to increase their value. This goal can be accomplished by processing fruit waste into fillers and incorporating them into polymeric materials. This review summarizes recent developments in technologies to incorporate fruit wastes from sources such as grape, apple, olive, banana, coconut, pineapple, and others into polymer matrices to create green composites or films. Various surface treatments of biofillers/fibers are also discussed; these treatments increase the adhesion and applicability of the fillers with various bioplastics. Lastly, a comprehensive review of sustainable and biodegradable biocomposites is presented.

scholarly journals Tailoring P-N Conversion in All-solid-state Polymer Composites with A Record Ionic Thermopower

2021 ◽  
Author(s):  
Cheng Chi ◽  
Meng An ◽  
Xin Qi ◽  
Yang Li ◽  
Ruihan Zhang ◽  
...  
Keyword(s):  
Solid State ◽  
Polymer Composites ◽  
High Voltage ◽  
High Performance ◽  
Large Scale ◽  
Ambient Air ◽  
Organic Polymer ◽  
Cyclic Stability ◽  
Simulation Results ◽  
The Relationship

Abstract All-solid-state organic polymer composites are promising ionic thermoelectric (i-TE) materials, however, the transition from aqueous to organic gelation always sacrifices their thermoelectric performance, especially the n-type thermopowers are severely unexplored, leaving the unrealized large-scale application of p-n integrated i-TE devices. Herein, we successfully developed all-solid-state PVDF-HFP/NaTFSI/PC (PhNP) with ultrahigh thermopower (Si) of +20 mV K-1. The experimental and molecular simulation results detailly specified the relationship between the interactions among ions and polymers and the highly enhanced thermopower. Meanwhile, a major scientific breakthrough in p-n conversion from +20 to -6 mV K-1 was achieved by incorporating tris(pentafluorophenyl)borane (TPFPB) to capture Na+ and TFSI- anions dominating the thermodiffusion process. As a result, an all-solid-state i-TE generator generated a high voltage over 2.6 V at ΔT=10 K and exhibited excellent cyclic stability under ambient air condition employing only 13 pairs of p-n couples, showing great potential for developing high-performance i-TE systems.

Design of an intermediate high voltage EM for 3-D studies of biological material and its integration with a system for remote access

1995 ◽  
Vol 53 ◽  
pp. 66-67 ◽  
Author(s):  
Mark H. Ellisman
Keyword(s):  
High Voltage ◽  
High Performance ◽  
Remote Access ◽  
3 Dimensional ◽  
Voltage Electron ◽  
Remote Operation ◽  
High Voltage Electron Microscope ◽  
La Jolla ◽  
Performance Computing ◽  
Advanced Version

The increased availability of High Performance Computing and Communications (HPCC) offers scientists and students the potential for effective remote interactive use of centralized, specialized, and expensive instrumentation and computers. Examples of instruments capable of remote operation that may be usefully controlled from a distance are increasing. Some in current use include telescopes, networks of remote geophysical sensing devices and more recently, the intermediate high voltage electron microscope developed at the San Diego Microscopy and Imaging Resource (SDMIR) in La Jolla. In this presentation the imaging capabilities of a specially designed JEOL 4000EX IVEM will be described. This instrument was developed mainly to facilitate the extraction of 3-dimensional information from thick sections. In addition, progress will be described on a project now underway to develop a more advanced version of the Telemicroscopy software we previously demonstrated as a tool to for providing remote access to this IVEM (Mercurio et al., 1992; Fan et al., 1992).

Microstructure of sputter deposited Ni-Sb ohmic contacts on GaAs

1989 ◽  
Vol 47 ◽  
pp. 450-451
Author(s):  
S. Yegnasubramanian ◽  
V.C. Kannan ◽  
R. Dutto ◽  
P.J. Sakach
Keyword(s):  
High Performance ◽  
Ohmic Contacts ◽  
Surface Defects ◽  
Pure Metal ◽  
Device Fabrication ◽  
Native Oxide ◽  
Metal Thin Films ◽  
Recent Developments ◽  
Different Temperatures ◽  
Sputter Deposited

Recent developments in the fabrication of high performance GaAs devices impose crucial requirements of low resistance ohmic contacts with excellent contact properties such as, thermal stability, contact resistivity, contact depth, Schottky barrier height etc. The nature of the interface plays an important role in the stability of the contacts due to problems associated with interdiffusion and compound formation at the interface during device fabrication. Contacts of pure metal thin films on GaAs are not desirable due to the presence of the native oxide and surface defects at the interface. Nickel has been used as a contact metal on GaAs and has been found to be reactive at low temperatures. Formation Of Ni2 GaAs at 200 - 350C is reported and is found to grow epitaxially on (001) and on (111) GaAs, but is shown to be unstable at 450C. This paper reports the investigations carried out to understand the microstructure, nature of the interface and composition of sputter deposited and annealed (at different temperatures) Ni-Sb ohmic contacts on GaAs by TEM. Attempts were made to correlate the electrical properties of the films such as the sheet resistance and contact resistance, with the microstructure. The observations are corroborated by Scanning Auger Microprobe (SAM) investigations.

Sign in / Sign up

Export Citation Format

Share Document