What is the current during BaTiO3 voltage breakdown?

In summary, the conversation discusses an experiment on dielectric breakdown using 0.3mm of BaTiO3 between two electrodes. The breakdown occurred at 97kV/mm, or approximately 29kV at 0.3mm thickness. The current used was from a dc high voltage generator with a current limit of 4 mA and a maximum voltage of 35 kV. The relationship between μJ/m and current is not clear, but it was the only information on joules used in the experiment. The conversation also mentions the possibility of negative resistance and the use of similar compounds in voltage protection devices. High voltage sources can cause damage to the dielectric before actual breakdown occurs.
  • #1
HelloCthulhu
151
3
I've been researching dielectric breakdown for a while and came across this interesting experiment:

https://tore.tuhh.de/bitstream/1142..._nano_to_millimeter_scale_TUB_Doc_version.pdf

0.3mm of BaTiO3 was placed between two electrodes and reached its dielectric breakdown at 97kV/mm. At 0.3mm thickness this was probably around 29kV. I'm trying to understand what the current was, but so far I only know that a dc high voltage generator HCN 140-35000 with a current limit of 4 mA and a maximum voltage of 35 kV was used during the experiment. I'm not familiar with the relationship between μJ/m and current if there is one, but it's the only information on joules used I could see. Any assistance is greatly appreciated!

notes.png
 
Physics news on Phys.org
  • #2
https://ieeexplore.ieee.org/document/38354
Expect negative resistance after breakdown. Apparently the current limit prevented avalanch breakdown. 35K at 4 mil was 150 Watts which is a pretty hefty high voltage source. Similar compounds used in voltage protection devices have an avalanche breackdown that drop line voltage to a few volts. Usually used for electronics capacitors, dielectric has problems at high voltage. (Dielectric is damaged before voltage breakdown.)
 
  • Like
Likes HelloCthulhu

1. What is the voltage breakdown of BaTiO3?

The voltage breakdown of BaTiO3 is the point at which the material experiences a sudden increase in current due to the breakdown of its insulating properties. This is typically seen at high electric fields, around 10^6 V/m for BaTiO3.

2. How does the current change during BaTiO3 voltage breakdown?

The current during BaTiO3 voltage breakdown can increase dramatically, sometimes by several orders of magnitude. This is due to the material transitioning from an insulating to a conducting state, allowing for the flow of electric current.

3. What factors influence the voltage breakdown of BaTiO3?

The voltage breakdown of BaTiO3 can be influenced by a variety of factors, including the composition and purity of the material, the electric field strength, and the temperature. Additionally, the presence of defects or impurities can also affect the breakdown voltage.

4. Is the voltage breakdown of BaTiO3 reversible?

In most cases, the voltage breakdown of BaTiO3 is not reversible. Once the material has undergone breakdown and transitioned to a conducting state, it is unlikely to return to its original insulating state. However, under certain conditions, such as reducing the applied electric field, the material may partially recover its insulating properties.

5. How is the voltage breakdown of BaTiO3 used in practical applications?

The voltage breakdown of BaTiO3 is an important property that is utilized in various practical applications, such as in capacitors and varistors. These devices take advantage of the material's ability to transition from an insulating to a conducting state, allowing for the control and regulation of electric current.

Similar threads

What is the breakdown voltage for this two dielectric capacitor (BaTiO3,LPDE)?
    • Introductory Physics Homework Help
Replies
8
Views
1K
Cause of multiple paths of electrical breakdown?
    • Electromagnetism
Replies
5
Views
2K
Dielectric breakdown with insulating electrodes
    • Electrical Engineering
Replies
2
Views
1K
What is voltage when running current through copper plats?
    • Electrical Engineering
Replies
1
Views
1K
What does the path of least resistance really mean?
    • Electromagnetism
Replies
3
Views
12K
Anomalies in the Asymmetrical Capacitors for Propulsion Tests
    • General Discussion
Replies
2
Views
4K
Magnetic Reconnection vs Double Layers
    • Astronomy and Astrophysics
Replies
8
Views
4K
Why is the U-2 nicknamed the Dragon Lady?
    • General Discussion
Replies
4
Views
7K

Hot Threads

Recent Insights

Back
Top