asimpson
Mechanical
- Aug 6, 2010
- 300
I would like to make an electret material for a expirament with capacitance. I have been given instructions for making it from a mixture of waxes:
"Bulk electrets can be prepared by cooling a suitable dielectric material within a strong electric field, after heating it above its melting temperature. The field repositions the charge carriers or aligns the dipoles within the material. When the material cools, solidification freezes them in position. Materials used for electrets are usually waxes, polymers or resins. One of the earliest recipes consists of 45% carnauba wax, 45% white rosin, and 10% white beeswax, melted, mixed together, and left to cool in a static electric field of several kilovolts/cm. The thermo-dielectric effect, related to this process, was first described by the Brazilian researcher Joaquim Costa Ribeiro."
These waxes come in a variety of forms and grades and I have concerns about which to get.
Does anybody have better knowledge of the type of wax to use and where it would be best sourced?
Many thanks
"Bulk electrets can be prepared by cooling a suitable dielectric material within a strong electric field, after heating it above its melting temperature. The field repositions the charge carriers or aligns the dipoles within the material. When the material cools, solidification freezes them in position. Materials used for electrets are usually waxes, polymers or resins. One of the earliest recipes consists of 45% carnauba wax, 45% white rosin, and 10% white beeswax, melted, mixed together, and left to cool in a static electric field of several kilovolts/cm. The thermo-dielectric effect, related to this process, was first described by the Brazilian researcher Joaquim Costa Ribeiro."
These waxes come in a variety of forms and grades and I have concerns about which to get.
Does anybody have better knowledge of the type of wax to use and where it would be best sourced?
Many thanks
