Enhancing dielectric constants of elastomer sheets
Dielectric ceramic particulates are introduced into thin a sheet of pre-cured elastomer to form a sheet. Successive layers of the sheets may then be laminated together to form a finished article. An electric field may be applied to the article during a curing process while the article is at a temperature near a Curie temperature of the dielectric ceramic particulates to increase a dielectric constant of the article. As each sheet may be different from each other in the finished article, the resulting finished article may have anisotropic dielectric and mechanical properties. Similarly, tiled dielectric ceramic structures may be introduced into the elastomers layers to generate materials with varying dielectric constants.
1. A method comprising:
receiving an uncured elastomer;
depositing dielectric ceramic particulates having a value of a dielectric constant satisfying one or more conditions onto the uncured elastomer;
receiving an additional uncured elastomer;
layering the additional uncured elastomer onto the dielectric ceramic particulates deposited onto the uncured elastomer;
depositing additional dielectric ceramic particulates having an additional value of an additional dielectric constant satisfying the one or more conditions;
curing the uncured elastomer and the additional uncured elastomer for an interval of time and at a specified temperature within a mold having an anode and a cathode; and
for at least a portion of the interval of time during the curing while a temperature within the mold is within a threshold amount of a Curie temperature of the dielectric ceramic particulates or of the additional dielectric ceramic particulates, applying an electric field by applying a voltage to the anode and to the cathode of the mold including the uncured elastomer and the additional uncured elastomer such that a cured elastomer and the uncured elastomer have different dielectric constants.
2. The method of claim 1 , wherein depositing dielectric ceramic particulates having the value of the dielectric constant satisfying one or more conditions onto the uncured elastomer comprises:
lifting the dielectric ceramic particulates from a substrate onto the uncured elastomer.
3. The method of claim 2 , wherein the substrate includes a plurality of cavities configured to create dielectric ceramic structures from dielectric ceramic particulates printed onto the substrate.
4. The method of claim 3 , wherein a dielectric ceramic structure comprises a tile.
5. The method of claim 3 , wherein the substrate comprises a material configured to burn out during sintering to create the dielectric ceramic structures.
6. The method of claim 2 , wherein the dielectric ceramic structures are separated by at least a threshold distance.
7. The method of claim 2 , wherein a threshold distance between the dielectric ceramic structures varies along one or more dimensions.
8. The method of claim 1 , wherein depositing dielectric ceramic particulates having the value of the dielectric constant satisfying one or more conditions onto the uncured elastomer comprises:
screen printing a pattern of the dielectric ceramic particulates onto the uncured elastomer.
9. The method of claim 1 , wherein a condition of the value of the dielectric constant comprises a value greater than a threshold value.
10. The method of claim 1 , wherein a condition of the value of the dielectric constant comprises a specific value of the dielectric constant.
11. The method of claim 1 , wherein the dielectric ceramic particulates have a Curie temperature within an additional threshold amount of a melt temperature of the uncured elastomer.
12. The method of claim 1 , wherein the additional value of the additional dielectric constant differs from the value of the dielectric constant.
13. The method of claim 1 , wherein an elastic modulus of the uncured elastomer differs from an elastic modulus of the additional uncured elastomer.