Question

Which material has the highest dielectric constant?

Answer 1

Hint:When building thin-film capacitors and other situations where the material is expected to introduce capacitance into a circuit, knowing the dielectric constant is crucial. The test film is used to make a thin film capacitor to measure it. The dielectric constant is the ratio of a capacitor's capacitance using test material as the dielectric to a capacitor's capacitance with a vacuum (or air).

Complete step-by-step solution:
The dielectric constant of films that will be electrically insulated should be below. The dielectric constant of films that will employ dielectrics in capacitors should be high so that the capacitor dimensions can keep to a minimum. Temperature and current frequency have an impact on the dielectric constant. Frequencies less than \[1,000{\text{ }}MHz\] are considered low megahertz. Frequencies in the high megahertz range are greater than \[1,000{\text{ }}MHz\].
The highest dielectric constant is Calcium Copper Titanate.
The dielectric constant of Calcium Copper Titanate (CCTO) is over \[10,000\] and goes deeper at higher frequencies. It used to develop supercapacitors. However, there are some limitations to its application, and it may take some time.
The dielectric constant of barium titanate in some forms stated to reach \[18,000\] , and Monsanto and EEStor have filed for patents on the invention. They hoped to construct a supercapacitor out of it without having to use carbon versions.
While Monsanto did not pursue the idea, EEStor continues to pursue it and recently claimed to have come close. They say that once completed the EV energy storage system would be revolutionized.

Additional information:
Because there are fewer molecules per unit volume, there is less interaction with electric fields, resulting in a lower dielectric constant. As the temperature rises, the density of the oil reduces, and the dielectric constant of the oil falls as well.
Then, the least dielectric constant is Oil. Hydrocarbon oils have a dielectric constant of roughly \[0.0013\]or \[0.05\] percent per degree Celsius.

Note:
Capacitors are made with high dielectric constant (\[k\]) insulator compositions (as high as \[k = 1,200\]), whereas low k insulator compositions (\[k = 9 - 15\]) offer insulation between conductors.
A high dielectric constant allows for the development of higher electrostatic forces, which are responsible for actuation stress and strain, while material strength refers to the elastic ability to bear the electrostatic forces.