Dielectric Strength Of Liquids: looking for data

Click For Summary

Discussion Overview

The discussion revolves around the search for reliable data on the dielectric strength (breakdown field) of various liquid insulators that possess high permittivity and low viscosity. The context includes potential applications in electrostatic alternators, particularly in the megawatt (MW) or gigawatt (GW) range.

Discussion Character

  • Exploratory
  • Technical explanation
  • Homework-related

Main Points Raised

  • One participant seeks data on the dielectric strength of specific liquids, including ethylene glycol carbonate, propylene glycol carbonate, ethanol, methanol, and others.
  • Another participant suggests looking in the Handbook of Chemistry and Physics under "Dielectric Constant - Liquids" for relevant information.
  • A different participant expresses that they already have the permittivities but questions where to find the dielectric strength data.
  • One participant recommends searching more technical resources, including specific websites for scientific literature.

Areas of Agreement / Disagreement

The discussion does not reach a consensus on where to find the desired dielectric strength data, as participants provide differing suggestions and resources without confirming any specific source as definitive.

Contextual Notes

Participants express uncertainty about the availability of dielectric strength data in common references and suggest various technical resources, indicating a potential gap in accessible information.

Enthalpy
Messages
667
Reaction score
4
Hello all of you!

I'm looking for reliable data about the dielectric strength (=breakdown field) of liquid insulators with a high permittivity and a low viscosity and not too dangerous.

Examples of such liquids:
- Ethylene glycol carbonate. Propylene glycol carbonate. Maybe the oxalates and sulphates.
- Ethanol. Methanol.
- Small ketones and aldehydes
- Small phosphates?
- Furfuraldehyde maybe.

I couldn't find them in my Handbook of Chemistry and Physics (1990), in Wikipedia, nor on the Web.

The use would be in an electrostatic alternator which looks very interesting (MW or GW range!), as I describe it there:
http://saposjoint.cjb.net/Forum/viewtopic.php?f=66&t=1684
I suggest beginning to read on page 2 with the sketches and diagrams.

Thank you!
 
Chemistry news on Phys.org
Enthalpy said:
Hello all of you!

I'm looking for reliable data about the dielectric strength (=breakdown field) of liquid insulators with a high permittivity and a low viscosity and not too dangerous.

Examples of such liquids:
- Ethylene glycol carbonate. Propylene glycol carbonate. Maybe the oxalates and sulphates.
- Ethanol. Methanol.
- Small ketones and aldehydes
- Small phosphates?
- Furfuraldehyde maybe.

I couldn't find them in my Handbook of Chemistry and Physics (1990),...

Learn to use the index of the handbook! Look under "Dielectric Constant - Liquids" . In the 84th Edition it is in Section 6 pages 155 to 177.
 
I already have all permittivities.

Where do you find the dielectric strength?
 
Thank you!