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Related Concept Videos

Capacitor With A Dielectric01:18

Capacitor With A Dielectric

Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
MOS Capacitor01:25

MOS Capacitor

A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
Energy Stored in a Capacitor: Problem Solving01:26

Energy Stored in a Capacitor: Problem Solving

In 1749, Benjamin Franklin coined the word battery for a series of capacitors connected to store energy. Capacitors store electric potential energy that can be released over a short time. This property means capacitors have a wide range of applications.
Capacitor-discharge ignition is a type of ignition system commonly found in small engines where the energy released from a capacitor ignites an induction coil that, in turn, fires the spark plug.
To calculate the energy stored in a capacitor of...
Energy Stored in a Capacitor01:12

Energy Stored in a Capacitor

When an archer pulls the string in a bow, he saves the work done in the form of elastic potential energy. When he releases the string, the potential energy is released as kinetic energy of the arrow. A capacitor works on the same principle in which the work done is saved as electric potential energy. The potential energy (UC) could be calculated by measuring the work done (W) to charge the capacitor.
Energy Stored in Capacitors01:10

Energy Stored in Capacitors

A parallel plate capacitor, when connected to a battery, develops a potential difference across its plates. This potential difference is key to the operation of the capacitor, as it determines how much electrical energy the capacitor can store.
By integrating the equation that relates voltage and current in a capacitor, one can derive an equation for the voltage across the capacitor at any given time. This equation is crucial in understanding and predicting the behavior of capacitors in...

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Updated: May 18, 2026

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
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Published on: April 8, 2018

Temperature-stable high-energy-density capacitors using complex perovskite thin films.

Do-Kyun Kwon1, Min Hyuk Lee

  • 1Department of Materials Engineering, Korea Aerospace University, Goyang, Korea. dkwon@kau.ac.kr

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|September 26, 2012
PubMed
Summary

Researchers developed temperature-stable, high-energy-density capacitors using chemical-solution-derived (1-x)BaTiO(3-x)Bi(Mg,Ti)O(3) thin films. These films exhibit high dielectric permittivity and excellent thermal stability for demanding pulse power applications.

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Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
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Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites

Published on: September 19, 2020

Area of Science:

  • Materials Science
  • Solid State Chemistry
  • Electrical Engineering

Background:

  • Developing advanced dielectric materials is crucial for high-performance energy storage devices.
  • Existing materials often face limitations in thermal stability and energy density for demanding applications.

Purpose of the Study:

  • To explore the synthesis and dielectric properties of (1-x)BaTiO(3-x)Bi(Mg,Ti)O(3) complex perovskites for temperature-stable, high-energy-density capacitor applications.
  • To optimize solution chemistry for stable precursor solutions and thin film fabrication.

Main Methods:

  • Chemical-solution-derived synthesis of (1-x)BaTiO(3-x)Bi(Mg,Ti)O(3) thin films (250-500 nm thickness).
  • Fabrication via repeated spinning and crystallization processes.
  • Dielectric characterization, including polarization response, dielectric breakdown strength, and leakage current measurements at elevated temperatures.

Main Results:

  • Thin films exhibited high relative dielectric permittivity (>900) and near-linear polarization.
  • Achieved high dielectric breakdown strength (up to 2.08 MV/cm) and low leakage current densities (~10^-8 A/cm^2) even at 200°C.
  • Demonstrated excellent structural and dielectric property stability at high temperatures.
  • A 500-nm-thick 0.88BaTiO(3)-0.12Bi(Mg,Ti)O(3) film achieved an energy density of 37 J/cm^3 at 1.9 MV/cm.

Conclusions:

  • The synthesized (1-x)BaTiO(3-x)Bi(Mg,Ti)O(3) complex perovskites show significant promise for high-temperature pulse power capacitor applications.
  • The combination of high energy density and excellent temperature stability makes these materials suitable for advanced energy storage solutions.