Method for the preparation of a pyroelectric material

A method for the preparation of a pyroelectric structure comprising:

• dispersing solid, discrete crystalline pyroelectric particles in a liquid and placing the resulting dispersion between an opposing pair of electrodes,
• establishing an electric field between said electrodes with a sufficient magnitude to cause said particles in said dispersion to be deposited in a layer on one of said electrodes, and
• changing the temperature of said particles before deposition of said particles on said one electrode, the temperature change being sufficient to orient the pyroelectric axes of the crystal particles in the deposited layer.

A method for the preparation of a pyroelectric structure comprising:

• spraying pyroelectric particles in a liquid dispersion into the space between two spaced electrodes,
• establishing an electric field between said spaced electrodes of sufficient intensity to cause said particles to be deposited as a layer on a substrate at the potential of one of said electrodes, and
• changing the temperature of said particles before deposition thereof to thereby orient the pyroelectric axes of the crystal particles in the deposited layer.

A method for the preparation of a complex pyroelectric structure comprising:

• dispersing crystalline pyroelectric particles and a binder material between an opposing pair of electrodes,
• establishing an electric field between said electrodes with a sufficient magnitude to cause said particles to be deposited in a layer on one of said electrodes, and
• changing the temperature of said particles before deposition of said particles on said one electrode, the temperature change being sufficient to orient the pyroelectric axes of the crystal particles in the deposited layer to obtain a pyroelectric structure codeposited with said binder material.