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An electrical insulator that can be polarized by an applied electric field. When a dielectric is placed in an electric field, electric charges do not flow through the material as they do in a conductor, but only slightly shift from their average equilibrium positions causing dielectric polarization. Because of dielectric polarization, positive charges are displaced toward the field and negative charges shift in the opposite direction. This creates an internal electric field that reduces the overall field within the dielectric itself.
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Scope and Importance
Crystal growth is an important field of materials science which has got scientific as well as technological importance. Scientific importance of the subject is mainly related to the growth of single crystals and its characterization while the technological importance is dealing with the growth of large single crystals and its application on device fabrication. The present research work (reported in this thesis) is scientific in nature and not technological.
It will be interesting to study the micro hardness studies for different orientations of the grown crystals. Grown crystals could also be subjected to Nuclear Magnetic Resonance (NMR), Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM) studies to visualize the structure and defect mechanisms.
The term insulator implies low electrical conduction; dielectric typically means materials with a high polarizability. The latter is expressed by a number called the relative permittivity (also known in older texts as dielectric constant). The term "dielectric" was coined by William Whewell (from "dia-electric") in response to a request from Michael Faraday.
Dipolar polarization is a polarization that is either inherent to polar molecules (orientation polarization), or can be induced in any molecule in which the asymmetric distortion of the nuclei is possible (distortion polarization). Orientation polarization results from a permanent dipole, e.g., that arising from the 104.45° angle between the asymmetric bonds between oxygen and hydrogen atoms in the water molecule, which retains polarization in the absence of an external electric field. The assembly of these dipoles forms a macroscopic polarization.
The analysis shows that the total dielectric material market is projected to reach market revenue worth $50.63 billion by 2020. In terms of the technological segments, materials for TFT-LCD displays accounted for the largest market revenue, worth $25.00 billion, while materials for plasma displays accounted for the least market share, in 2012. Moreover, OLED dielectric material market is expected to grow at the highest CAGR from 2012 to 2020.In terms of the application segment, materials in conventional application sector accounted for the largest market revenue, while materials in the ‘transparent application’ sector recorded the least market revenue, in 2012. The APAC region commanded the largest market share in terms of revenue. However, Asia-Pacific and ROW are likely to grow at the highest CAGR.
International symposium and workshops
1.Electronics and Electrical Engineering,
November 03-05, 2015 Valencia, Spain.
November 14-16, 2016 Atlanta, USA
3.4th Materials Science & Engineering Conference
September 14-16, 2015 Florida, USA.
4.5th Nanotek and Expo Conference
November 16-18, 2015 San Antonio, USA
5.5th International Conference on Solid State Science and Technology,
December 13th, 2015 Langkawi, Malaysia.
6.4th First International Symposium on Dielectric Materials and Applications (ISyDMA’2016) Kenitra,
May 4th, 2016,Rabat, Morocco
List of Societies and Associations
2.Dielectrics and electrical insulation society
List of Companies
This page will be updated regularly.
This page was last updated on September 21, 2020